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stabilize const_mut_refs

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This commit is contained in:
Ralf Jung 2024-08-17 14:19:34 +02:00
parent 4f1be92153
commit 3175cc2814
152 changed files with 286 additions and 1376 deletions
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7
compiler/rustc_const_eval/messages.ftl
View File

@ -230,9 +230,6 @@ const_eval_memory_exhausted =
const_eval_modified_global =
modifying a static's initial value from another static's initializer
const_eval_mut_deref =
mutation through a reference is not allowed in {const_eval_const_context}s
const_eval_mutable_ptr_in_final = encountered mutable pointer in final value of {const_eval_intern_kind}
const_eval_nested_static_in_thread_local = #[thread_local] does not support implicit nested statics, please create explicit static items and refer to them instead
@ -363,10 +360,6 @@ const_eval_too_generic =
const_eval_too_many_caller_args =
calling a function with more arguments than it expected
const_eval_transient_mut_borrow = mutable references are not allowed in {const_eval_const_context}s
const_eval_transient_mut_raw = raw mutable pointers are not allowed in {const_eval_const_context}s
const_eval_try_block_from_output_non_const =
`try` block cannot convert `{$ty}` to the result in {const_eval_const_context}s
const_eval_unallowed_fn_pointer_call = function pointer calls are not allowed in {const_eval_const_context}s

111
compiler/rustc_const_eval/src/check_consts/check.rs
View File

@ -22,7 +22,6 @@
use rustc_span::{sym, Span, Symbol, DUMMY_SP};
use rustc_trait_selection::error_reporting::InferCtxtErrorExt;
use rustc_trait_selection::traits::{self, ObligationCauseCode, ObligationCtxt};
use rustc_type_ir::visit::{TypeSuperVisitable, TypeVisitor};
use tracing::{debug, instrument, trace};
use super::ops::{self, NonConstOp, Status};
@ -166,24 +165,6 @@ fn in_return_place(
}
}
struct LocalReturnTyVisitor<'a, 'mir, 'tcx> {
kind: LocalKind,
checker: &'a mut Checker<'mir, 'tcx>,
}
impl<'a, 'mir, 'tcx> TypeVisitor<TyCtxt<'tcx>> for LocalReturnTyVisitor<'a, 'mir, 'tcx> {
fn visit_ty(&mut self, t: Ty<'tcx>) {
match t.kind() {
ty::FnPtr(..) => {}
ty::Ref(_, _, hir::Mutability::Mut) => {
self.checker.check_op(ops::mut_ref::MutRef(self.kind));
t.super_visit_with(self)
}
_ => t.super_visit_with(self),
}
}
}
pub struct Checker<'mir, 'tcx> {
ccx: &'mir ConstCx<'mir, 'tcx>,
qualifs: Qualifs<'mir, 'tcx>,
@ -230,25 +211,6 @@ pub fn check_body(&mut self) {
return;
}
// The local type and predicate checks are not free and only relevant for `const fn`s.
if self.const_kind() == hir::ConstContext::ConstFn {
for (idx, local) in body.local_decls.iter_enumerated() {
// Handle the return place below.
if idx == RETURN_PLACE {
continue;
}
self.span = local.source_info.span;
self.check_local_or_return_ty(local.ty, idx);
}
// impl trait is gone in MIR, so check the return type of a const fn by its signature
// instead of the type of the return place.
self.span = body.local_decls[RETURN_PLACE].source_info.span;
let return_ty = self.ccx.fn_sig().output();
self.check_local_or_return_ty(return_ty.skip_binder(), RETURN_PLACE);
}
if !tcx.has_attr(def_id, sym::rustc_do_not_const_check) {
self.visit_body(body);
}
@ -358,16 +320,8 @@ fn check_static(&mut self, def_id: DefId, span: Span) {
self.check_op_spanned(ops::StaticAccess, span)
}
fn check_local_or_return_ty(&mut self, ty: Ty<'tcx>, local: Local) {
let kind = self.body.local_kind(local);
let mut visitor = LocalReturnTyVisitor { kind, checker: self };
visitor.visit_ty(ty);
}
fn check_mut_borrow(&mut self, place: &Place<'_>, kind: hir::BorrowKind) {
match self.const_kind() {
let is_transient = match self.const_kind() {
// In a const fn all borrows are transient or point to the places given via
// references in the arguments (so we already checked them with
// TransientMutBorrow/MutBorrow as appropriate).
@ -375,7 +329,7 @@ fn check_mut_borrow(&mut self, place: &Place<'_>, kind: hir::BorrowKind) {
// NOTE: Once we have heap allocations during CTFE we need to figure out
// how to prevent `const fn` to create long-lived allocations that point
// to mutable memory.
hir::ConstContext::ConstFn => self.check_op(ops::TransientMutBorrow(kind)),
hir::ConstContext::ConstFn => true,
_ => {
// For indirect places, we are not creating a new permanent borrow, it's just as
// transient as the already existing one. For reborrowing references this is handled
@ -389,12 +343,11 @@ fn check_mut_borrow(&mut self, place: &Place<'_>, kind: hir::BorrowKind) {
// `StorageDead` in every control flow path leading to a `return` terminator.
// The good news is that interning will detect if any unexpected mutable
// pointer slips through.
if place.is_indirect() || self.local_is_transient(place.local) {
self.check_op(ops::TransientMutBorrow(kind));
} else {
self.check_op(ops::MutBorrow(kind));
}
place.is_indirect() || self.local_is_transient(place.local)
}
};
if !is_transient {
self.check_op(ops::EscapingMutBorrow(kind));
}
}
}
@ -636,58 +589,6 @@ fn visit_operand(&mut self, op: &Operand<'tcx>, location: Location) {
}
}
}
fn visit_projection_elem(
&mut self,
place_ref: PlaceRef<'tcx>,
elem: PlaceElem<'tcx>,
context: PlaceContext,
location: Location,
) {
trace!(
"visit_projection_elem: place_ref={:?} elem={:?} \
context={:?} location={:?}",
place_ref, elem, context, location,
);
self.super_projection_elem(place_ref, elem, context, location);
match elem {
ProjectionElem::Deref => {
let base_ty = place_ref.ty(self.body, self.tcx).ty;
if base_ty.is_unsafe_ptr() {
if place_ref.projection.is_empty() {
let decl = &self.body.local_decls[place_ref.local];
// If this is a static, then this is not really dereferencing a pointer,
// just directly accessing a static. That is not subject to any feature
// gates (except for the one about whether statics can even be used, but
// that is checked already by `visit_operand`).
if let LocalInfo::StaticRef { .. } = *decl.local_info() {
return;
}
}
// `*const T` is stable, `*mut T` is not
if !base_ty.is_mutable_ptr() {
return;
}
self.check_op(ops::RawMutPtrDeref);
}
if context.is_mutating_use() {
self.check_op(ops::MutDeref);
}
}
ProjectionElem::ConstantIndex { .. }
| ProjectionElem::Downcast(..)
| ProjectionElem::OpaqueCast(..)
| ProjectionElem::Subslice { .. }
| ProjectionElem::Subtype(..)
| ProjectionElem::Field(..)
| ProjectionElem::Index(_) => {}
}
}
fn visit_source_info(&mut self, source_info: &SourceInfo) {
trace!("visit_source_info: source_info={:?}", source_info);

97
compiler/rustc_const_eval/src/check_consts/ops.rs
View File

@ -8,7 +8,7 @@
use rustc_hir::def_id::DefId;
use rustc_infer::infer::TyCtxtInferExt;
use rustc_infer::traits::{ImplSource, Obligation, ObligationCause};
use rustc_middle::mir::{self, CallSource};
use rustc_middle::mir::CallSource;
use rustc_middle::span_bug;
use rustc_middle::ty::print::{with_no_trimmed_paths, PrintTraitRefExt as _};
use rustc_middle::ty::{
@ -431,9 +431,9 @@ fn build_error(&self, ccx: &ConstCx<'_, 'tcx>, span: Span) -> Diag<'tcx> {
/// This op is for `&mut` borrows in the trailing expression of a constant
/// which uses the "enclosing scopes rule" to leak its locals into anonymous
/// static or const items.
pub(crate) struct MutBorrow(pub hir::BorrowKind);
pub(crate) struct EscapingMutBorrow(pub hir::BorrowKind);
impl<'tcx> NonConstOp<'tcx> for MutBorrow {
impl<'tcx> NonConstOp<'tcx> for EscapingMutBorrow {
fn status_in_item(&self, _ccx: &ConstCx<'_, 'tcx>) -> Status {
Status::Forbidden
}
@ -460,49 +460,6 @@ fn build_error(&self, ccx: &ConstCx<'_, 'tcx>, span: Span) -> Diag<'tcx> {
}
}
#[derive(Debug)]
pub(crate) struct TransientMutBorrow(pub hir::BorrowKind);
impl<'tcx> NonConstOp<'tcx> for TransientMutBorrow {
fn status_in_item(&self, _: &ConstCx<'_, 'tcx>) -> Status {
Status::Unstable(sym::const_mut_refs)
}
fn build_error(&self, ccx: &ConstCx<'_, 'tcx>, span: Span) -> Diag<'tcx> {
let kind = ccx.const_kind();
match self.0 {
hir::BorrowKind::Raw => ccx
.tcx
.sess
.create_feature_err(errors::TransientMutRawErr { span, kind }, sym::const_mut_refs),
hir::BorrowKind::Ref => ccx.tcx.sess.create_feature_err(
errors::TransientMutBorrowErr { span, kind },
sym::const_mut_refs,
),
}
}
}
#[derive(Debug)]
pub(crate) struct MutDeref;
impl<'tcx> NonConstOp<'tcx> for MutDeref {
fn status_in_item(&self, _: &ConstCx<'_, 'tcx>) -> Status {
Status::Unstable(sym::const_mut_refs)
}
fn importance(&self) -> DiagImportance {
// Usually a side-effect of a `TransientMutBorrow` somewhere.
DiagImportance::Secondary
}
fn build_error(&self, ccx: &ConstCx<'_, 'tcx>, span: Span) -> Diag<'tcx> {
ccx.tcx.sess.create_feature_err(
errors::MutDerefErr { span, kind: ccx.const_kind() },
sym::const_mut_refs,
)
}
}
/// A call to a `panic()` lang item where the first argument is _not_ a `&str`.
#[derive(Debug)]
pub(crate) struct PanicNonStr;
@ -524,24 +481,6 @@ fn build_error(&self, ccx: &ConstCx<'_, 'tcx>, span: Span) -> Diag<'tcx> {
}
}
#[derive(Debug)]
pub(crate) struct RawMutPtrDeref;
impl<'tcx> NonConstOp<'tcx> for RawMutPtrDeref {
fn status_in_item(&self, _: &ConstCx<'_, '_>) -> Status {
Status::Unstable(sym::const_mut_refs)
}
#[allow(rustc::untranslatable_diagnostic)] // FIXME: make this translatable
fn build_error(&self, ccx: &ConstCx<'_, 'tcx>, span: Span) -> Diag<'tcx> {
feature_err(
&ccx.tcx.sess,
sym::const_mut_refs,
span,
format!("dereferencing raw mutable pointers in {}s is unstable", ccx.const_kind(),),
)
}
}
/// Casting raw pointer or function pointer to an integer.
/// Not currently intended to ever be allowed, even behind a feature gate: operation depends on
/// allocation base addresses that are not known at compile-time.
@ -588,33 +527,3 @@ fn build_error(&self, ccx: &ConstCx<'_, 'tcx>, span: Span) -> Diag<'tcx> {
ccx.dcx().create_err(errors::ThreadLocalAccessErr { span })
}
}
/// Types that cannot appear in the signature or locals of a `const fn`.
pub(crate) mod mut_ref {
use super::*;
#[derive(Debug)]
pub(crate) struct MutRef(pub mir::LocalKind);
impl<'tcx> NonConstOp<'tcx> for MutRef {
fn status_in_item(&self, _ccx: &ConstCx<'_, 'tcx>) -> Status {
Status::Unstable(sym::const_mut_refs)
}
fn importance(&self) -> DiagImportance {
match self.0 {
mir::LocalKind::Temp => DiagImportance::Secondary,
mir::LocalKind::ReturnPointer | mir::LocalKind::Arg => DiagImportance::Primary,
}
}
#[allow(rustc::untranslatable_diagnostic)] // FIXME: make this translatable
fn build_error(&self, ccx: &ConstCx<'_, 'tcx>, span: Span) -> Diag<'tcx> {
feature_err(
&ccx.tcx.sess,
sym::const_mut_refs,
span,
format!("mutable references are not allowed in {}s", ccx.const_kind()),
)
}
}
}

24
compiler/rustc_const_eval/src/errors.rs
View File

@ -93,30 +93,6 @@ pub(crate) struct PanicNonStrErr {
pub span: Span,
}
#[derive(Diagnostic)]
#[diag(const_eval_mut_deref, code = E0658)]
pub(crate) struct MutDerefErr {
#[primary_span]
pub span: Span,
pub kind: ConstContext,
}
#[derive(Diagnostic)]
#[diag(const_eval_transient_mut_borrow, code = E0658)]
pub(crate) struct TransientMutBorrowErr {
#[primary_span]
pub span: Span,
pub kind: ConstContext,
}
#[derive(Diagnostic)]
#[diag(const_eval_transient_mut_raw, code = E0658)]
pub(crate) struct TransientMutRawErr {
#[primary_span]
pub span: Span,
pub kind: ConstContext,
}
#[derive(Diagnostic)]
#[diag(const_eval_max_num_nodes_in_const)]
pub(crate) struct MaxNumNodesInConstErr {

4
compiler/rustc_error_codes/src/error_codes/E0764.md
View File

@ -3,8 +3,6 @@ A mutable reference was used in a constant.
Erroneous code example:
```compile_fail,E0764
#![feature(const_mut_refs)]
fn main() {
const OH_NO: &'static mut usize = &mut 1; // error!
}
@ -26,8 +24,6 @@ Remember: you cannot use a function call inside a constant or static. However,
you can totally use it in constant functions:
```
#![feature(const_mut_refs)]
const fn foo(x: usize) -> usize {
let mut y = 1;
let z = &mut y;

2
compiler/rustc_feature/src/accepted.rs
View File

@ -143,6 +143,8 @@ macro_rules! declare_features {
(accepted, const_let, "1.33.0", Some(48821)),
/// Allows the use of `loop` and `while` in constants.
(accepted, const_loop, "1.46.0", Some(52000)),
/// Allows using `&mut` in constant functions.
(accepted, const_mut_refs, "CURRENT_RUSTC_VERSION", Some(57349)),
/// Allows panicking during const eval (producing compile-time errors).
(accepted, const_panic, "1.57.0", Some(51999)),
/// Allows dereferencing raw pointers during const eval.

2
compiler/rustc_feature/src/unstable.rs
View File

@ -403,8 +403,6 @@ pub fn internal(&self, feature: Symbol) -> bool {
(incomplete, const_closures, "1.68.0", Some(106003)),
/// Allows `for _ in _` loops in const contexts.
(unstable, const_for, "1.56.0", Some(87575)),
/// Allows using `&mut` in constant functions.
(unstable, const_mut_refs, "1.41.0", Some(57349)),
/// Be more precise when looking for live drops in a const context.
(unstable, const_precise_live_drops, "1.46.0", Some(73255)),
/// Allows references to types with interior mutability within constants

2
library/alloc/src/lib.rs
View File

@ -164,13 +164,13 @@
//
// Language features:
// tidy-alphabetical-start
#![cfg_attr(bootstrap, feature(const_mut_refs))]
#![cfg_attr(not(test), feature(coroutine_trait))]
#![cfg_attr(test, feature(panic_update_hook))]
#![cfg_attr(test, feature(test))]
#![feature(allocator_internals)]
#![feature(allow_internal_unstable)]
#![feature(cfg_sanitize)]
#![feature(const_mut_refs)]
#![feature(const_precise_live_drops)]
#![feature(const_ptr_write)]
#![feature(const_try)]

2
library/alloc/tests/lib.rs
View File

@ -6,7 +6,7 @@
#![feature(cow_is_borrowed)]
#![feature(const_cow_is_borrowed)]
#![feature(const_heap)]
#![feature(const_mut_refs)]
#![cfg_attr(bootstrap, feature(const_mut_refs))]
#![feature(const_slice_from_raw_parts_mut)]
#![feature(const_ptr_write)]
#![feature(const_try)]

2
library/core/src/lib.rs
View File

@ -191,6 +191,7 @@
//
// Language features:
// tidy-alphabetical-start
#![cfg_attr(bootstrap, feature(const_mut_refs))]
#![feature(abi_unadjusted)]
#![feature(adt_const_params)]
#![feature(allow_internal_unsafe)]
@ -201,7 +202,6 @@
#![feature(cfg_target_has_atomic_equal_alignment)]
#![feature(cfg_ub_checks)]
#![feature(const_for)]
#![feature(const_mut_refs)]
#![feature(const_precise_live_drops)]
#![feature(const_refs_to_cell)]
#![feature(decl_macro)]

4
library/core/src/ptr/mut_ptr.rs
View File

@ -1569,7 +1569,7 @@ pub const fn align_offset(self, align: usize) -> usize
///
/// ```
/// #![feature(const_pointer_is_aligned)]
/// #![feature(const_mut_refs)]
/// # #![cfg_attr(bootstrap, feature(const_mut_refs))]
///
/// // On some platforms, the alignment of primitives is less than their size.
/// #[repr(align(4))]
@ -1695,7 +1695,7 @@ pub const fn is_aligned(self) -> bool
/// ```
/// #![feature(pointer_is_aligned_to)]
/// #![feature(const_pointer_is_aligned)]
/// #![feature(const_mut_refs)]
/// # #![cfg_attr(bootstrap, feature(const_mut_refs))]
///
/// // On some platforms, the alignment of i32 is less than 4.
/// #[repr(align(4))]

2
library/core/tests/lib.rs
View File

@ -1,4 +1,5 @@
// tidy-alphabetical-start
#![cfg_attr(bootstrap, feature(const_mut_refs))]
#![cfg_attr(target_has_atomic = "128", feature(integer_atomics))]
#![cfg_attr(test, feature(cfg_match))]
#![feature(alloc_layout_extra)]
@ -26,7 +27,6 @@
#![feature(const_ipv6)]
#![feature(const_likely)]
#![feature(const_maybe_uninit_as_mut_ptr)]
#![feature(const_mut_refs)]
#![feature(const_nonnull_new)]
#![feature(const_option)]
#![feature(const_option_ext)]

2
library/std/src/lib.rs
View File

@ -272,6 +272,7 @@
//
// Language features:
// tidy-alphabetical-start
#![cfg_attr(bootstrap, feature(const_mut_refs))]
#![feature(alloc_error_handler)]
#![feature(allocator_internals)]
#![feature(allow_internal_unsafe)]
@ -281,7 +282,6 @@
#![feature(cfg_target_thread_local)]
#![feature(cfi_encoding)]
#![feature(concat_idents)]
#![feature(const_mut_refs)]
#![feature(decl_macro)]
#![feature(deprecated_suggestion)]
#![feature(doc_cfg)]

6
src/tools/clippy/tests/ui/arithmetic_side_effects.rs
View File

@ -1,5 +1,8 @@
//@aux-build:proc_macro_derive.rs
#![feature(f128)]
#![feature(f16)]
#![allow(
clippy::assign_op_pattern,
clippy::erasing_op,
@ -10,9 +13,6 @@
arithmetic_overflow,
unconditional_panic
)]
#![feature(const_mut_refs)]
#![feature(f128)]
#![feature(f16)]
#![warn(clippy::arithmetic_side_effects)]
extern crate proc_macro_derive;

1
src/tools/clippy/tests/ui/missing_const_for_fn/could_be_const.fixed
View File

@ -1,7 +1,6 @@
#![warn(clippy::missing_const_for_fn)]
#![allow(incomplete_features, clippy::let_and_return, clippy::missing_transmute_annotations)]
#![allow(unsupported_calling_conventions)]
#![feature(const_mut_refs)]
#![feature(const_trait_impl)]
use std::mem::transmute;

1
src/tools/clippy/tests/ui/missing_const_for_fn/could_be_const.rs
View File

@ -1,7 +1,6 @@
#![warn(clippy::missing_const_for_fn)]
#![allow(incomplete_features, clippy::let_and_return, clippy::missing_transmute_annotations)]
#![allow(unsupported_calling_conventions)]
#![feature(const_mut_refs)]
#![feature(const_trait_impl)]
use std::mem::transmute;

52
src/tools/clippy/tests/ui/missing_const_for_fn/could_be_const.stderr
View File

@ -1,5 +1,5 @@
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:15:5
--> tests/ui/missing_const_for_fn/could_be_const.rs:14:5
|
LL | / pub fn new() -> Self {
LL | |
@ -16,7 +16,7 @@ LL | pub const fn new() -> Self {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:21:5
--> tests/ui/missing_const_for_fn/could_be_const.rs:20:5
|
LL | / fn const_generic_params<'a, T, const N: usize>(&self, b: &'a [T; N]) -> &'a [T; N] {
LL | |
@ -30,7 +30,7 @@ LL | const fn const_generic_params<'a, T, const N: usize>(&self, b: &'a [T;
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:28:1
--> tests/ui/missing_const_for_fn/could_be_const.rs:27:1
|
LL | / fn one() -> i32 {
LL | |
@ -44,7 +44,7 @@ LL | const fn one() -> i32 {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:34:1
--> tests/ui/missing_const_for_fn/could_be_const.rs:33:1
|
LL | / fn two() -> i32 {
LL | |
@ -59,7 +59,7 @@ LL | const fn two() -> i32 {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:41:1
--> tests/ui/missing_const_for_fn/could_be_const.rs:40:1
|
LL | / fn string() -> String {
LL | |
@ -73,7 +73,7 @@ LL | const fn string() -> String {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:47:1
--> tests/ui/missing_const_for_fn/could_be_const.rs:46:1
|
LL | / unsafe fn four() -> i32 {
LL | |
@ -87,7 +87,7 @@ LL | const unsafe fn four() -> i32 {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:53:1
--> tests/ui/missing_const_for_fn/could_be_const.rs:52:1
|
LL | / fn generic<T>(t: T) -> T {
LL | |
@ -101,7 +101,7 @@ LL | const fn generic<T>(t: T) -> T {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:62:1
--> tests/ui/missing_const_for_fn/could_be_const.rs:61:1
|
LL | / fn generic_arr<T: Copy>(t: [T; 1]) -> T {
LL | |
@ -115,7 +115,7 @@ LL | const fn generic_arr<T: Copy>(t: [T; 1]) -> T {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:76:9
--> tests/ui/missing_const_for_fn/could_be_const.rs:75:9
|
LL | / pub fn b(self, a: &A) -> B {
LL | |
@ -129,7 +129,7 @@ LL | pub const fn b(self, a: &A) -> B {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:86:5
--> tests/ui/missing_const_for_fn/could_be_const.rs:85:5
|
LL | / fn const_fn_stabilized_before_msrv(byte: u8) {
LL | |
@ -143,7 +143,7 @@ LL | const fn const_fn_stabilized_before_msrv(byte: u8) {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:98:1
--> tests/ui/missing_const_for_fn/could_be_const.rs:97:1
|
LL | / fn msrv_1_46() -> i32 {
LL | |
@ -157,7 +157,7 @@ LL | const fn msrv_1_46() -> i32 {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:118:1
--> tests/ui/missing_const_for_fn/could_be_const.rs:117:1
|
LL | fn d(this: D) {}
| ^^^^^^^^^^^^^^^^
@ -168,7 +168,7 @@ LL | const fn d(this: D) {}
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:126:9
--> tests/ui/missing_const_for_fn/could_be_const.rs:125:9
|
LL | / fn deref_ptr_can_be_const(self) -> usize {
LL | |
@ -182,7 +182,7 @@ LL | const fn deref_ptr_can_be_const(self) -> usize {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:131:9
--> tests/ui/missing_const_for_fn/could_be_const.rs:130:9
|
LL | / fn deref_copied_val(self) -> usize {
LL | |
@ -196,7 +196,7 @@ LL | const fn deref_copied_val(self) -> usize {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:142:5
--> tests/ui/missing_const_for_fn/could_be_const.rs:141:5
|
LL | / fn union_access_can_be_const() {
LL | |
@ -211,7 +211,7 @@ LL | const fn union_access_can_be_const() {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:150:9
--> tests/ui/missing_const_for_fn/could_be_const.rs:149:9
|
LL | extern "C" fn c() {}
| ^^^^^^^^^^^^^^^^^^^^
@ -222,7 +222,7 @@ LL | const extern "C" fn c() {}
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:154:9
--> tests/ui/missing_const_for_fn/could_be_const.rs:153:9
|
LL | extern fn implicit_c() {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^
@ -233,7 +233,7 @@ LL | const extern fn implicit_c() {}
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:171:9
--> tests/ui/missing_const_for_fn/could_be_const.rs:170:9
|
LL | / pub fn new(strings: Vec<String>) -> Self {
LL | | Self { strings }
@ -246,7 +246,7 @@ LL | pub const fn new(strings: Vec<String>) -> Self {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:176:9
--> tests/ui/missing_const_for_fn/could_be_const.rs:175:9
|
LL | / pub fn empty() -> Self {
LL | | Self { strings: Vec::new() }
@ -259,7 +259,7 @@ LL | pub const fn empty() -> Self {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:187:9
--> tests/ui/missing_const_for_fn/could_be_const.rs:186:9
|
LL | / pub fn new(text: String) -> Self {
LL | | let vec = Vec::new();
@ -273,7 +273,7 @@ LL | pub const fn new(text: String) -> Self {
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:206:5
--> tests/ui/missing_const_for_fn/could_be_const.rs:205:5
|
LL | fn alias_ty_is_projection(bar: <() as FooTrait>::Foo) {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -284,7 +284,7 @@ LL | const fn alias_ty_is_projection(bar: <() as FooTrait>::Foo) {}
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:210:5
--> tests/ui/missing_const_for_fn/could_be_const.rs:209:5
|
LL | extern "C-unwind" fn c_unwind() {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -295,7 +295,7 @@ LL | const extern "C-unwind" fn c_unwind() {}
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:212:5
--> tests/ui/missing_const_for_fn/could_be_const.rs:211:5
|
LL | extern "system" fn system() {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -306,7 +306,7 @@ LL | const extern "system" fn system() {}
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:214:5
--> tests/ui/missing_const_for_fn/could_be_const.rs:213:5
|
LL | extern "system-unwind" fn system_unwind() {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -317,7 +317,7 @@ LL | const extern "system-unwind" fn system_unwind() {}
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:216:5
--> tests/ui/missing_const_for_fn/could_be_const.rs:215:5
|
LL | pub extern "stdcall" fn std_call() {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -328,7 +328,7 @@ LL | pub const extern "stdcall" fn std_call() {}
| +++++
error: this could be a `const fn`
--> tests/ui/missing_const_for_fn/could_be_const.rs:218:5
--> tests/ui/missing_const_for_fn/could_be_const.rs:217:5
|
LL | pub extern "stdcall-unwind" fn std_call_unwind() {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

2
src/tools/tidy/src/issues.txt
View File

@ -675,8 +675,6 @@ ui/consts/auxiliary/issue-17718-aux.rs
ui/consts/auxiliary/issue-63226.rs
ui/consts/const-eval/issue-100878.rs
ui/consts/const-eval/issue-104390.rs
ui/consts/const-eval/issue-114994-fail.rs
ui/consts/const-eval/issue-114994.rs
ui/consts/const-eval/issue-43197.rs
ui/consts/const-eval/issue-44578.rs
ui/consts/const-eval/issue-47971.rs

1
tests/ui/const-generics/issues/issue-100313.rs
View File

@ -1,5 +1,4 @@
#![allow(incomplete_features)]
#![feature(const_mut_refs)]
#![feature(adt_const_params, unsized_const_params)]
struct T<const B: &'static bool>;

6
tests/ui/const-generics/issues/issue-100313.stderr
View File

@ -1,16 +1,16 @@
error[E0080]: evaluation of constant value failed
--> $DIR/issue-100313.rs:10:13
--> $DIR/issue-100313.rs:9:13
|
LL | *(B as *const bool as *mut bool) = false;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ writing to ALLOC0 which is read-only
|
note: inside `T::<&true>::set_false`
--> $DIR/issue-100313.rs:10:13
--> $DIR/issue-100313.rs:9:13
|
LL | *(B as *const bool as *mut bool) = false;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: inside `_`
--> $DIR/issue-100313.rs:18:5
--> $DIR/issue-100313.rs:17:5
|
LL | x.set_false();
| ^^^^^^^^^^^^^

2
tests/ui/consts/auxiliary/const_mut_refs_crate.rs
View File

@ -10,8 +10,6 @@
// See also ../const-mut-refs-crate.rs for more details
// about this test.
#![feature(const_mut_refs)]
// if we used immutable references here, then promotion would
// turn the `&42` into a promoted, which gets duplicated arbitrarily.
pub static mut FOO: &'static mut i32 = &mut 42;

8
tests/ui/consts/const-address-of-mut.rs
View File

@ -1,10 +1,12 @@
const A: () = { let mut x = 2; &raw mut x; }; //~ mutable pointer
//@check-pass
static B: () = { let mut x = 2; &raw mut x; }; //~ mutable pointer
const A: () = { let mut x = 2; &raw mut x; };
static B: () = { let mut x = 2; &raw mut x; };
const fn foo() {
let mut x = 0;
let y = &raw mut x; //~ mutable pointer
let y = &raw mut x;
}
fn main() {}

33
tests/ui/consts/const-address-of-mut.stderr
View File

@ -1,33 +0,0 @@
error[E0658]: raw mutable pointers are not allowed in constants
--> $DIR/const-address-of-mut.rs:1:32
|
LL | const A: () = { let mut x = 2; &raw mut x; };
| ^^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: raw mutable pointers are not allowed in statics
--> $DIR/const-address-of-mut.rs:3:33
|
LL | static B: () = { let mut x = 2; &raw mut x; };
| ^^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: raw mutable pointers are not allowed in constant functions
--> $DIR/const-address-of-mut.rs:7:13
|
LL | let y = &raw mut x;
| ^^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0658`.

1
tests/ui/consts/const-eval/heap/alloc_intrinsic_errors.rs
View File

@ -1,6 +1,5 @@
#![feature(core_intrinsics)]
#![feature(const_heap)]
#![feature(const_mut_refs)]
use std::intrinsics;
const FOO: i32 = foo();

6
tests/ui/consts/const-eval/heap/alloc_intrinsic_errors.stderr
View File

@ -1,16 +1,16 @@
error[E0080]: evaluation of constant value failed
--> $DIR/alloc_intrinsic_errors.rs:9:17
--> $DIR/alloc_intrinsic_errors.rs:8:17
|
LL | let _ = intrinsics::const_allocate(4, 3) as *mut i32;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ invalid align passed to `const_allocate`: 3 is not a power of 2
|
note: inside `foo`
--> $DIR/alloc_intrinsic_errors.rs:9:17
--> $DIR/alloc_intrinsic_errors.rs:8:17
|
LL | let _ = intrinsics::const_allocate(4, 3) as *mut i32;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: inside `FOO`
--> $DIR/alloc_intrinsic_errors.rs:6:18
--> $DIR/alloc_intrinsic_errors.rs:5:18
|
LL | const FOO: i32 = foo();
| ^^^^^

1
tests/ui/consts/const-eval/heap/alloc_intrinsic_nontransient.rs
View File

@ -1,7 +1,6 @@
//@ run-pass
#![feature(core_intrinsics)]
#![feature(const_heap)]
#![feature(const_mut_refs)]
use std::intrinsics;
const FOO: &i32 = foo();

1
tests/ui/consts/const-eval/heap/alloc_intrinsic_transient.rs
View File

@ -1,7 +1,6 @@
//@ run-pass
#![feature(core_intrinsics)]
#![feature(const_heap)]
#![feature(const_mut_refs)]
use std::intrinsics;
const FOO: i32 = foo();

2
tests/ui/consts/const-eval/heap/alloc_intrinsic_uninit.32bit.stderr
View File

@ -1,5 +1,5 @@
error[E0080]: it is undefined behavior to use this value
--> $DIR/alloc_intrinsic_uninit.rs:8:1
--> $DIR/alloc_intrinsic_uninit.rs:7:1
|
LL | const BAR: &i32 = unsafe { &*(intrinsics::const_allocate(4, 4) as *mut i32) };
| ^^^^^^^^^^^^^^^ constructing invalid value at .<deref>: encountered uninitialized memory, but expected an integer

2
tests/ui/consts/const-eval/heap/alloc_intrinsic_uninit.64bit.stderr
View File

@ -1,5 +1,5 @@
error[E0080]: it is undefined behavior to use this value
--> $DIR/alloc_intrinsic_uninit.rs:8:1
--> $DIR/alloc_intrinsic_uninit.rs:7:1
|
LL | const BAR: &i32 = unsafe { &*(intrinsics::const_allocate(4, 4) as *mut i32) };
| ^^^^^^^^^^^^^^^ constructing invalid value at .<deref>: encountered uninitialized memory, but expected an integer

1
tests/ui/consts/const-eval/heap/alloc_intrinsic_uninit.rs
View File

@ -2,7 +2,6 @@
// compile-test
#![feature(core_intrinsics)]
#![feature(const_heap)]
#![feature(const_mut_refs)]
use std::intrinsics;
const BAR: &i32 = unsafe { &*(intrinsics::const_allocate(4, 4) as *mut i32) };

3
tests/ui/consts/const-eval/heap/alloc_intrinsic_untyped.rs
View File

@ -1,9 +1,8 @@
// We unleash Miri here since this test demonstrates code that bypasses the checks against interning
// mutable pointers, which currently ICEs. Unleashing Miri silence the ICE.
// mutable pointers, which currently ICEs. Unleashing Miri silences the ICE.
//@ compile-flags: -Zunleash-the-miri-inside-of-you
#![feature(core_intrinsics)]
#![feature(const_heap)]
#![feature(const_mut_refs)]
use std::intrinsics;
const BAR: *mut i32 = unsafe { intrinsics::const_allocate(4, 4) as *mut i32 };

2
tests/ui/consts/const-eval/heap/alloc_intrinsic_untyped.stderr
View File

@ -1,5 +1,5 @@
error: encountered mutable pointer in final value of constant
--> $DIR/alloc_intrinsic_untyped.rs:9:1
--> $DIR/alloc_intrinsic_untyped.rs:8:1
|
LL | const BAR: *mut i32 = unsafe { intrinsics::const_allocate(4, 4) as *mut i32 };
| ^^^^^^^^^^^^^^^^^^^

1
tests/ui/consts/const-eval/heap/dealloc_intrinsic.rs
View File

@ -1,7 +1,6 @@
//@ run-pass
#![feature(core_intrinsics)]
#![feature(const_heap)]
#![feature(const_mut_refs)]
use std::intrinsics;

1
tests/ui/consts/const-eval/heap/dealloc_intrinsic_dangling.rs
View File

@ -1,6 +1,5 @@
#![feature(core_intrinsics)]
#![feature(const_heap)]
#![feature(const_mut_refs)]
// Strip out raw byte dumps to make comparison platform-independent:
//@ normalize-stderr-test: "(the raw bytes of the constant) \(size: [0-9]*, align: [0-9]*\)" -> "$1 (size: $$SIZE, align: $$ALIGN)"

4
tests/ui/consts/const-eval/heap/dealloc_intrinsic_dangling.stderr
View File

@ -1,5 +1,5 @@
error[E0080]: it is undefined behavior to use this value
--> $DIR/dealloc_intrinsic_dangling.rs:12:1
--> $DIR/dealloc_intrinsic_dangling.rs:11:1
|
LL | const _X: &'static u8 = unsafe {
| ^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered a dangling reference (use-after-free)
@ -10,7 +10,7 @@ LL | const _X: &'static u8 = unsafe {
}
error[E0080]: evaluation of constant value failed
--> $DIR/dealloc_intrinsic_dangling.rs:23:5
--> $DIR/dealloc_intrinsic_dangling.rs:22:5
|
LL | *reference
| ^^^^^^^^^^ memory access failed: ALLOC1 has been freed, so this pointer is dangling

14
tests/ui/consts/const-eval/issue-114994-fail.rs
View File

@ -1,14 +0,0 @@
// This checks that function pointer signatures that are referenced mutably
// but contain a &mut T parameter still fail in a constant context: see issue #114994.
//
//@ check-fail
const fn use_mut_const_fn(_f: &mut fn(&mut String)) { //~ ERROR mutable references are not allowed in constant functions
()
}
const fn use_mut_const_tuple_fn(_f: (fn(), &mut u32)) { //~ ERROR mutable references are not allowed in constant functions
}
fn main() {}

23
tests/ui/consts/const-eval/issue-114994-fail.stderr
View File

@ -1,23 +0,0 @@
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/issue-114994-fail.rs:6:27
|
LL | const fn use_mut_const_fn(_f: &mut fn(&mut String)) {
| ^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/issue-114994-fail.rs:10:33
|
LL | const fn use_mut_const_tuple_fn(_f: (fn(), &mut u32)) {
| ^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0658`.

18
tests/ui/consts/const-eval/issue-114994.rs
View File

@ -1,18 +0,0 @@
// This checks that function pointer signatures containing &mut T types
// work in a constant context: see issue #114994.
//
//@ check-pass
const fn use_const_fn(_f: fn(&mut String)) {
()
}
const fn get_some_fn() -> fn(&mut String) {
String::clear
}
const fn some_const_fn() {
let _f: fn(&mut String) = String::clear;
}
fn main() {}

11
tests/ui/consts/const-eval/issue-65394.rs
View File

@ -1,11 +1,16 @@
//@ revisions: stock precise_drops
//@[precise_drops] check-pass
// This test originated from #65394. We conservatively assume that `x` is still `LiveDrop` even
// after it has been moved because a mutable reference to it exists at some point in the const body.
//
// We will likely have to change this behavior before we allow `&mut` in a `const`.
// With `&mut` in `const` being stable, this surprising behavior is now observable.
// `const_precise_live_drops` fixes that.
#![cfg_attr(precise_drops, feature(const_precise_live_drops))]
const _: Vec<i32> = {
let mut x = Vec::<i32>::new(); //~ ERROR destructor of
let r = &mut x; //~ ERROR mutable references are not allowed in constants
let mut x = Vec::<i32>::new(); //[stock]~ ERROR destructor of
let r = &mut x;
let y = x;
y
};

23
tests/ui/consts/const-eval/issue-65394.stderr
View File

@ -1,23 +0,0 @@
error[E0658]: mutable references are not allowed in constants
--> $DIR/issue-65394.rs:8:13
|
LL | let r = &mut x;
| ^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0493]: destructor of `Vec<i32>` cannot be evaluated at compile-time
--> $DIR/issue-65394.rs:7:9
|
LL | let mut x = Vec::<i32>::new();
| ^^^^^ the destructor for this type cannot be evaluated in constants
...
LL | };
| - value is dropped here
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0493, E0658.
For more information about an error, try `rustc --explain E0493`.

12
tests/ui/consts/const-eval/issue-65394.stock.stderr Normal file
View File

@ -0,0 +1,12 @@
error[E0493]: destructor of `Vec<i32>` cannot be evaluated at compile-time
--> $DIR/issue-65394.rs:12:9
|
LL | let mut x = Vec::<i32>::new();
| ^^^^^ the destructor for this type cannot be evaluated in constants
...
LL | };
| - value is dropped here
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0493`.

2
tests/ui/consts/const-eval/mod-static-with-const-fn.rs
View File

@ -1,8 +1,6 @@
// New test for #53818: modifying static memory at compile-time is not allowed.
// The test should never compile successfully
#![feature(const_mut_refs)]
use std::cell::UnsafeCell;
struct Foo(UnsafeCell<u32>);

2
tests/ui/consts/const-eval/mod-static-with-const-fn.stderr
View File

@ -1,5 +1,5 @@
error[E0080]: could not evaluate static initializer
--> $DIR/mod-static-with-const-fn.rs:16:5
--> $DIR/mod-static-with-const-fn.rs:14:5
|
LL | *FOO.0.get() = 5;
| ^^^^^^^^^^^^^^^^ modifying a static's initial value from another static's initializer

2
tests/ui/consts/const-eval/nrvo.rs
View File

@ -4,8 +4,6 @@
// its address may be taken and it may be written to indirectly. Ensure that the const-eval
// interpreter can handle this.
#![feature(const_mut_refs)]
#[inline(never)] // Try to ensure that MIR optimizations don't optimize this away.
const fn init(buf: &mut [u8; 1024]) {
buf[33] = 3;

1
tests/ui/consts/const-eval/partial_ptr_overwrite.rs
View File

@ -1,5 +1,4 @@
// Test for the behavior described in <https://github.com/rust-lang/rust/issues/87184>.
#![feature(const_mut_refs)]
const PARTIAL_OVERWRITE: () = {
let mut p = &42;

2
tests/ui/consts/const-eval/partial_ptr_overwrite.stderr
View File

@ -1,5 +1,5 @@
error[E0080]: evaluation of constant value failed
--> $DIR/partial_ptr_overwrite.rs:8:9
--> $DIR/partial_ptr_overwrite.rs:7:9
|
LL | *(ptr as *mut u8) = 123;
| ^^^^^^^^^^^^^^^^^^^^^^^ unable to overwrite parts of a pointer in memory at ALLOC0

2
tests/ui/consts/const-eval/raw-pointer-ub.rs
View File

@ -1,4 +1,4 @@
#![feature(const_mut_refs, const_intrinsic_copy)]
#![feature(const_intrinsic_copy)]
const MISALIGNED_LOAD: () = unsafe {

2
tests/ui/consts/const-eval/ub-enum-overwrite.rs
View File

@ -1,5 +1,3 @@
#![feature(const_mut_refs)]
enum E {
A(u8),
B,

2
tests/ui/consts/const-eval/ub-enum-overwrite.stderr
View File

@ -1,5 +1,5 @@
error[E0080]: evaluation of constant value failed
--> $DIR/ub-enum-overwrite.rs:13:14
--> $DIR/ub-enum-overwrite.rs:11:14
|
LL | unsafe { *p }
| ^^ using uninitialized data, but this operation requires initialized memory

2
tests/ui/consts/const-eval/ub-write-through-immutable.rs
View File

@ -1,5 +1,5 @@
//! Ensure we catch UB due to writing through a shared reference.
#![feature(const_mut_refs, const_refs_to_cell)]
#![feature(const_refs_to_cell)]
#![allow(invalid_reference_casting)]
use std::mem;

1
tests/ui/consts/const-fn-error.rs
View File

@ -5,7 +5,6 @@ const fn f(x: usize) -> usize {
for i in 0..x {
//~^ ERROR cannot convert
//~| ERROR `for` is not allowed in a `const fn`
//~| ERROR mutable references are not allowed in constant functions
//~| ERROR cannot call non-const fn
sum += i;
}

13
tests/ui/consts/const-fn-error.stderr
View File

@ -5,7 +5,6 @@ LL | / for i in 0..x {
LL | |
LL | |
LL | |
LL | |
LL | | sum += i;
LL | | }
| |_____^
@ -28,16 +27,6 @@ help: add `#![feature(const_trait_impl)]` to the crate attributes to enable
LL + #![feature(const_trait_impl)]
|
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/const-fn-error.rs:5:14
|
LL | for i in 0..x {
| ^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0015]: cannot call non-const fn `<std::ops::Range<usize> as Iterator>::next` in constant functions
--> $DIR/const-fn-error.rs:5:14
|
@ -50,7 +39,7 @@ help: add `#![feature(const_trait_impl)]` to the crate attributes to enable
LL + #![feature(const_trait_impl)]
|
error: aborting due to 4 previous errors
error: aborting due to 3 previous errors
Some errors have detailed explanations: E0015, E0658.
For more information about an error, try `rustc --explain E0015`.

1
tests/ui/consts/const-for-feature-gate.rs
View File

@ -5,7 +5,6 @@
//~^ error: `for` is not allowed in a `const`
//~| ERROR: cannot convert
//~| ERROR: cannot call
//~| ERROR: mutable references
};
fn main() {}

12
tests/ui/consts/const-for-feature-gate.stderr
View File

@ -22,16 +22,6 @@ help: add `#![feature(const_trait_impl)]` to the crate attributes to enable
LL + #![feature(const_trait_impl)]
|
error[E0658]: mutable references are not allowed in constants
--> $DIR/const-for-feature-gate.rs:4:14
|
LL | for _ in 0..5 {}
| ^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0015]: cannot call non-const fn `<std::ops::Range<i32> as Iterator>::next` in constants
--> $DIR/const-for-feature-gate.rs:4:14
|
@ -44,7 +34,7 @@ help: add `#![feature(const_trait_impl)]` to the crate attributes to enable
LL + #![feature(const_trait_impl)]
|
error: aborting due to 4 previous errors
error: aborting due to 3 previous errors
Some errors have detailed explanations: E0015, E0658.
For more information about an error, try `rustc --explain E0015`.

1
tests/ui/consts/const-for.rs
View File

@ -1,5 +1,4 @@
#![feature(const_for)]
#![feature(const_mut_refs)]
const _: () = {
for _ in 0..5 {}

4
tests/ui/consts/const-for.stderr
View File

@ -1,5 +1,5 @@
error[E0015]: cannot convert `std::ops::Range<i32>` into an iterator in constants
--> $DIR/const-for.rs:5:14
--> $DIR/const-for.rs:4:14
|
LL | for _ in 0..5 {}
| ^^^^
@ -13,7 +13,7 @@ LL + #![feature(const_trait_impl)]
|
error[E0015]: cannot call non-const fn `<std::ops::Range<i32> as Iterator>::next` in constants
--> $DIR/const-for.rs:5:14
--> $DIR/const-for.rs:4:14
|
LL | for _ in 0..5 {}
| ^^^^

24
tests/ui/consts/const-multi-ref.rs
View File

@ -1,24 +0,0 @@
// Ensure that we point the user to the erroneous borrow but not to any subsequent borrows of that
// initial one.
const _: i32 = {
let mut a = 5;
let p = &mut a; //~ ERROR mutable references are not allowed in constants
let reborrow = {p};
let pp = &reborrow;
let ppp = &pp;
***ppp
};
const _: std::cell::Cell<i32> = {
let mut a = std::cell::Cell::new(5);
let p = &a; //~ ERROR borrowed element may contain interior mutability
let reborrow = {p};
let pp = &reborrow;
let ppp = &pp;
a
};
fn main() {}

23
tests/ui/consts/const-multi-ref.stderr
View File

@ -1,23 +0,0 @@
error[E0658]: mutable references are not allowed in constants
--> $DIR/const-multi-ref.rs:6:13
|
LL | let p = &mut a;
| ^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: cannot borrow here, since the borrowed element may contain interior mutability
--> $DIR/const-multi-ref.rs:16:13
|
LL | let p = &a;
| ^^
|
= note: see issue #80384 <https://github.com/rust-lang/rust/issues/80384> for more information
= help: add `#![feature(const_refs_to_cell)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0658`.

2
tests/ui/consts/const-mut-refs-crate.rs
View File

@ -1,8 +1,6 @@
//@ run-pass
//@ aux-build:const_mut_refs_crate.rs
#![feature(const_mut_refs)]
//! Regression test for https://github.com/rust-lang/rust/issues/79738
//! Show how we are not duplicating allocations anymore. Statics that
//! copy their value from another static used to also duplicate

1
tests/ui/consts/const-mut-refs/const_mut_address_of.rs
View File

@ -1,5 +1,4 @@
//@ check-pass
#![feature(const_mut_refs)]
struct Foo {
x: usize

1
tests/ui/consts/const-mut-refs/const_mut_refs.rs
View File

@ -1,5 +1,4 @@
//@ check-pass
#![feature(const_mut_refs)]
use std::sync::Mutex;

8
tests/ui/consts/const-mut-refs/feature-gate-const_mut_refs.rs
View File

@ -1,8 +0,0 @@
fn main() {
foo(&mut 5);
}
const fn foo(x: &mut i32) -> i32 { //~ ERROR mutable references
*x + 1
}

13
tests/ui/consts/const-mut-refs/feature-gate-const_mut_refs.stderr
View File

@ -1,13 +0,0 @@
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/feature-gate-const_mut_refs.rs:5:14
|
LL | const fn foo(x: &mut i32) -> i32 {
| ^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0658`.

1
tests/ui/consts/const-mut-refs/issue-76510.rs
View File

@ -2,7 +2,6 @@
const S: &'static mut str = &mut " hello ";
//~^ ERROR: mutable references are not allowed in the final value of constants
//~| ERROR: mutation through a reference is not allowed in constants
const fn trigger() -> [(); unsafe {
let s = transmute::<(*const u8, usize), &ManuallyDrop<str>>((S.as_ptr(), 3));

15
tests/ui/consts/const-mut-refs/issue-76510.stderr
View File

@ -4,17 +4,6 @@ error[E0764]: mutable references are not allowed in the final value of constants
LL | const S: &'static mut str = &mut " hello ";
| ^^^^^^^^^^^^^^
error[E0658]: mutation through a reference is not allowed in constants
--> $DIR/issue-76510.rs:3:29
|
LL | const S: &'static mut str = &mut " hello ";
| ^^^^^^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 1 previous error
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0658, E0764.
For more information about an error, try `rustc --explain E0658`.
For more information about this error, try `rustc --explain E0764`.

11
tests/ui/consts/const-mut-refs/mut_ref_in_final.rs
View File

@ -1,4 +1,4 @@
#![feature(const_mut_refs)]
use std::cell::UnsafeCell;
const NULL: *mut i32 = std::ptr::null_mut();
const A: *const i32 = &4;
@ -25,7 +25,14 @@ const fn helper(x: &mut i32) -> Option<&mut i32> { Some(x) }
x
};
use std::cell::UnsafeCell;
// Still ok, since `x` will be moved before the final pointer is crated,
// so `_ref` doesn't actually point to the memory that escapes.
const C_NO: *const i32 = &{
let mut x = 42;
let _ref = &mut x;
x
};
struct NotAMutex<T>(UnsafeCell<T>);
unsafe impl<T> Sync for NotAMutex<T> {}

14
tests/ui/consts/const-mut-refs/mut_ref_in_final.stderr
View File

@ -25,7 +25,7 @@ LL | const B4: Option<&mut i32> = helper(&mut 42);
| using this value as a constant requires that borrow lasts for `'static`
error[E0716]: temporary value dropped while borrowed
--> $DIR/mut_ref_in_final.rs:33:65
--> $DIR/mut_ref_in_final.rs:40:65
|
LL | const FOO: NotAMutex<&mut i32> = NotAMutex(UnsafeCell::new(&mut 42));
| -------------------------------^^--
@ -35,7 +35,7 @@ LL | const FOO: NotAMutex<&mut i32> = NotAMutex(UnsafeCell::new(&mut 42));
| using this value as a constant requires that borrow lasts for `'static`
error[E0716]: temporary value dropped while borrowed
--> $DIR/mut_ref_in_final.rs:36:67
--> $DIR/mut_ref_in_final.rs:43:67
|
LL | static FOO2: NotAMutex<&mut i32> = NotAMutex(UnsafeCell::new(&mut 42));
| -------------------------------^^--
@ -45,7 +45,7 @@ LL | static FOO2: NotAMutex<&mut i32> = NotAMutex(UnsafeCell::new(&mut 42));
| using this value as a static requires that borrow lasts for `'static`
error[E0716]: temporary value dropped while borrowed
--> $DIR/mut_ref_in_final.rs:39:71
--> $DIR/mut_ref_in_final.rs:46:71
|
LL | static mut FOO3: NotAMutex<&mut i32> = NotAMutex(UnsafeCell::new(&mut 42));
| -------------------------------^^--
@ -55,25 +55,25 @@ LL | static mut FOO3: NotAMutex<&mut i32> = NotAMutex(UnsafeCell::new(&mut 42));
| using this value as a static requires that borrow lasts for `'static`
error[E0764]: mutable references are not allowed in the final value of statics
--> $DIR/mut_ref_in_final.rs:52:53
--> $DIR/mut_ref_in_final.rs:59:53
|
LL | static RAW_MUT_CAST_S: SyncPtr<i32> = SyncPtr { x : &mut 42 as *mut _ as *const _ };
| ^^^^^^^
error[E0764]: mutable references are not allowed in the final value of statics
--> $DIR/mut_ref_in_final.rs:54:54
--> $DIR/mut_ref_in_final.rs:61:54
|
LL | static RAW_MUT_COERCE_S: SyncPtr<i32> = SyncPtr { x: &mut 0 };
| ^^^^^^
error[E0764]: mutable references are not allowed in the final value of constants
--> $DIR/mut_ref_in_final.rs:56:52
--> $DIR/mut_ref_in_final.rs:63:52
|
LL | const RAW_MUT_CAST_C: SyncPtr<i32> = SyncPtr { x : &mut 42 as *mut _ as *const _ };
| ^^^^^^^
error[E0764]: mutable references are not allowed in the final value of constants
--> $DIR/mut_ref_in_final.rs:58:53
--> $DIR/mut_ref_in_final.rs:65:53
|
LL | const RAW_MUT_COERCE_C: SyncPtr<i32> = SyncPtr { x: &mut 0 };
| ^^^^^^

2
tests/ui/consts/const-mut-refs/mut_ref_in_final_dynamic_check.rs
View File

@ -1,7 +1,7 @@
//@ normalize-stderr-test: "(the raw bytes of the constant) \(size: [0-9]*, align: [0-9]*\)" -> "$1 (size: $$SIZE, align: $$ALIGN)"
//@ normalize-stderr-test: "( 0x[0-9a-f][0-9a-f] │)? ([0-9a-f][0-9a-f] |__ |╾─*ALLOC[0-9]+(\+[a-z0-9]+)?(<imm>)?─*╼ )+ *│.*" -> " HEX_DUMP"
//@ normalize-stderr-test: "HEX_DUMP\s*\n\s*HEX_DUMP" -> "HEX_DUMP"
#![feature(const_mut_refs, const_refs_to_static)]
#![feature(const_refs_to_static)]
use std::sync::Mutex;

2
tests/ui/consts/const-ref-to-static-linux-vtable.rs
View File

@ -1,6 +1,6 @@
//@check-pass
//! This is the reduced version of the "Linux kernel vtable" use-case.
#![feature(const_mut_refs, const_refs_to_static)]
#![feature(const_refs_to_static)]
use std::ptr::addr_of_mut;
#[repr(C)]

9
tests/ui/consts/const-suggest-feature.rs
View File

@ -1,7 +1,10 @@
use std::cell::Cell;
const WRITE: () = unsafe {
*std::ptr::null_mut() = 0;
//~^ ERROR dereferencing raw mutable pointers in constants is unstable
//~| HELP add `#![feature(const_mut_refs)]` to the crate attributes to enable
let x = Cell::new(0);
let y = &x;
//~^ ERROR interior mutability
//~| HELP add `#![feature(const_refs_to_cell)]` to the crate attributes to enable
};
fn main() {}

12
tests/ui/consts/const-suggest-feature.stderr
View File

@ -1,11 +1,11 @@
error[E0658]: dereferencing raw mutable pointers in constants is unstable
--> $DIR/const-suggest-feature.rs:2:5
error[E0658]: cannot borrow here, since the borrowed element may contain interior mutability
--> $DIR/const-suggest-feature.rs:5:13
|
LL | *std::ptr::null_mut() = 0;
| ^^^^^^^^^^^^^^^^^^^^^^^^^
LL | let y = &x;
| ^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: see issue #80384 <https://github.com/rust-lang/rust/issues/80384> for more information
= help: add `#![feature(const_refs_to_cell)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 1 previous error

7
tests/ui/consts/const_let_assign3.rs
View File

@ -1,23 +1,24 @@
//@ check-pass
struct S {
state: u32,
}
impl S {
const fn foo(&mut self, x: u32) {
//~^ ERROR mutable reference
self.state = x;
}
}
const FOO: S = {
let mut s = S { state: 42 };
s.foo(3); //~ ERROR mutable reference
s.foo(3);
s
};
type Array = [u32; {
let mut x = 2;
let y = &mut x; //~ ERROR mutable reference
let y = &mut x;
*y = 42;
*y
}];

33
tests/ui/consts/const_let_assign3.stderr
View File

@ -1,33 +0,0 @@
error[E0658]: mutable references are not allowed in constants
--> $DIR/const_let_assign3.rs:14:5
|
LL | s.foo(3);
| ^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/const_let_assign3.rs:6:18
|
LL | const fn foo(&mut self, x: u32) {
| ^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: mutable references are not allowed in constants
--> $DIR/const_let_assign3.rs:20:13
|
LL | let y = &mut x;
| ^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0658`.

2
tests/ui/consts/const_refs_to_static_fail.rs
View File

@ -1,6 +1,6 @@
//@ normalize-stderr-test: "(the raw bytes of the constant) \(size: [0-9]*, align: [0-9]*\)" -> "$1 (size: $$SIZE, align: $$ALIGN)"
//@ normalize-stderr-test: "([0-9a-f][0-9a-f] |╾─*ALLOC[0-9]+(\+[a-z0-9]+)?(<imm>)?─*╼ )+ *│.*" -> "HEX_DUMP"
#![feature(const_refs_to_static, const_mut_refs, sync_unsafe_cell)]
#![feature(const_refs_to_static, sync_unsafe_cell)]
use std::cell::SyncUnsafeCell;
static S: SyncUnsafeCell<i32> = SyncUnsafeCell::new(0);

2
tests/ui/consts/control-flow/loop.rs
View File

@ -52,14 +52,12 @@ fn main() {
for i in 0..4 { //~ ERROR `for` is not allowed in a `const`
//~^ ERROR: cannot call
//~| ERROR: mutable references
//~| ERROR: cannot convert
x += i;
}
for i in 0..4 { //~ ERROR `for` is not allowed in a `const`
//~^ ERROR: cannot call
//~| ERROR: mutable references
//~| ERROR: cannot convert
x += i;
}

30
tests/ui/consts/control-flow/loop.stderr
View File

@ -4,7 +4,6 @@ error[E0658]: `for` is not allowed in a `const`
LL | / for i in 0..4 {
LL | |
LL | |
LL | |
LL | | x += i;
LL | | }
| |_____^
@ -14,12 +13,11 @@ LL | | }
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: `for` is not allowed in a `const`
--> $DIR/loop.rs:60:5
--> $DIR/loop.rs:59:5
|
LL | / for i in 0..4 {
LL | |
LL | |
LL | |
LL | | x += i;
LL | | }
| |_____^
@ -42,16 +40,6 @@ help: add `#![feature(const_trait_impl)]` to the crate attributes to enable
LL + #![feature(const_trait_impl)]
|
error[E0658]: mutable references are not allowed in constants
--> $DIR/loop.rs:53:14
|
LL | for i in 0..4 {
| ^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0015]: cannot call non-const fn `<std::ops::Range<i32> as Iterator>::next` in constants
--> $DIR/loop.rs:53:14
|
@ -65,7 +53,7 @@ LL + #![feature(const_trait_impl)]
|
error[E0015]: cannot convert `std::ops::Range<i32>` into an iterator in constants
--> $DIR/loop.rs:60:14
--> $DIR/loop.rs:59:14
|
LL | for i in 0..4 {
| ^^^^
@ -78,18 +66,8 @@ help: add `#![feature(const_trait_impl)]` to the crate attributes to enable
LL + #![feature(const_trait_impl)]
|
error[E0658]: mutable references are not allowed in constants
--> $DIR/loop.rs:60:14
|
LL | for i in 0..4 {
| ^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0015]: cannot call non-const fn `<std::ops::Range<i32> as Iterator>::next` in constants
--> $DIR/loop.rs:60:14
--> $DIR/loop.rs:59:14
|
LL | for i in 0..4 {
| ^^^^
@ -100,7 +78,7 @@ help: add `#![feature(const_trait_impl)]` to the crate attributes to enable
LL + #![feature(const_trait_impl)]
|
error: aborting due to 8 previous errors
error: aborting due to 6 previous errors
Some errors have detailed explanations: E0015, E0658.
For more information about an error, try `rustc --explain E0015`.

1
tests/ui/consts/copy-intrinsic.rs
View File

@ -2,7 +2,6 @@
// ignore-tidy-linelength
#![feature(intrinsics, staged_api)]
#![feature(const_mut_refs)]
use std::mem;
extern "rust-intrinsic" {

8
tests/ui/consts/copy-intrinsic.stderr
View File

@ -1,23 +1,23 @@
error[E0080]: evaluation of constant value failed
--> $DIR/copy-intrinsic.rs:29:5
--> $DIR/copy-intrinsic.rs:28:5
|
LL | copy_nonoverlapping(0x100 as *const i32, dangle, 1);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ memory access failed: expected a pointer to 4 bytes of memory, but got 0x100[noalloc] which is a dangling pointer (it has no provenance)
error[E0080]: evaluation of constant value failed
--> $DIR/copy-intrinsic.rs:38:5
--> $DIR/copy-intrinsic.rs:37:5
|
LL | copy_nonoverlapping(dangle, 0x100 as *mut i32, 1);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ memory access failed: expected a pointer to 4 bytes of memory, but got ALLOC0+0x28 which is at or beyond the end of the allocation of size 4 bytes
error[E0080]: evaluation of constant value failed
--> $DIR/copy-intrinsic.rs:45:5
--> $DIR/copy-intrinsic.rs:44:5
|
LL | copy(&x, &mut y, 1usize << (mem::size_of::<usize>() * 8 - 1));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ overflow computing total size of `copy`
error[E0080]: evaluation of constant value failed
--> $DIR/copy-intrinsic.rs:51:5
--> $DIR/copy-intrinsic.rs:50:5
|
LL | copy_nonoverlapping(&x, &mut y, 1usize << (mem::size_of::<usize>() * 8 - 1));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ overflow computing total size of `copy_nonoverlapping`

1
tests/ui/consts/fn_trait_refs.rs
View File

@ -4,7 +4,6 @@
#![feature(fn_traits)]
#![feature(unboxed_closures)]
#![feature(const_trait_impl)]
#![feature(const_mut_refs)]
#![feature(const_cmp)]
#![feature(const_refs_to_cell)]

48
tests/ui/consts/fn_trait_refs.stderr
View File

@ -5,25 +5,25 @@ LL | #![feature(const_fn_trait_ref_impls)]
| ^^^^^^^^^^^^^^^^^^^^^^^^
error[E0635]: unknown feature `const_cmp`
--> $DIR/fn_trait_refs.rs:8:12
--> $DIR/fn_trait_refs.rs:7:12
|
LL | #![feature(const_cmp)]
| ^^^^^^^^^
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/fn_trait_refs.rs:15:15
--> $DIR/fn_trait_refs.rs:14:15
|
LL | T: ~const Fn<()> + ~const Destruct,
| ^^^^^^
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/fn_trait_refs.rs:15:31
--> $DIR/fn_trait_refs.rs:14:31
|
LL | T: ~const Fn<()> + ~const Destruct,
| ^^^^^^^^
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/fn_trait_refs.rs:15:15
--> $DIR/fn_trait_refs.rs:14:15
|
LL | T: ~const Fn<()> + ~const Destruct,
| ^^^^^^
@ -31,19 +31,19 @@ LL | T: ~const Fn<()> + ~const Destruct,
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/fn_trait_refs.rs:22:15
--> $DIR/fn_trait_refs.rs:21:15
|
LL | T: ~const FnMut<()> + ~const Destruct,
| ^^^^^^^^^
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/fn_trait_refs.rs:22:34
--> $DIR/fn_trait_refs.rs:21:34
|
LL | T: ~const FnMut<()> + ~const Destruct,
| ^^^^^^^^
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/fn_trait_refs.rs:22:15
--> $DIR/fn_trait_refs.rs:21:15
|
LL | T: ~const FnMut<()> + ~const Destruct,
| ^^^^^^^^^
@ -51,13 +51,13 @@ LL | T: ~const FnMut<()> + ~const Destruct,
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/fn_trait_refs.rs:29:15
--> $DIR/fn_trait_refs.rs:28:15
|
LL | T: ~const FnOnce<()>,
| ^^^^^^^^^^
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/fn_trait_refs.rs:29:15
--> $DIR/fn_trait_refs.rs:28:15
|
LL | T: ~const FnOnce<()>,
| ^^^^^^^^^^
@ -65,19 +65,19 @@ LL | T: ~const FnOnce<()>,
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/fn_trait_refs.rs:36:15
--> $DIR/fn_trait_refs.rs:35:15
|
LL | T: ~const Fn<()> + ~const Destruct,
| ^^^^^^
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/fn_trait_refs.rs:36:31
--> $DIR/fn_trait_refs.rs:35:31
|
LL | T: ~const Fn<()> + ~const Destruct,
| ^^^^^^^^
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/fn_trait_refs.rs:36:15
--> $DIR/fn_trait_refs.rs:35:15
|
LL | T: ~const Fn<()> + ~const Destruct,
| ^^^^^^
@ -85,19 +85,19 @@ LL | T: ~const Fn<()> + ~const Destruct,
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/fn_trait_refs.rs:50:15
--> $DIR/fn_trait_refs.rs:49:15
|
LL | T: ~const FnMut<()> + ~const Destruct,
| ^^^^^^^^^
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/fn_trait_refs.rs:50:34
--> $DIR/fn_trait_refs.rs:49:34
|
LL | T: ~const FnMut<()> + ~const Destruct,
| ^^^^^^^^
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/fn_trait_refs.rs:50:15
--> $DIR/fn_trait_refs.rs:49:15
|
LL | T: ~const FnMut<()> + ~const Destruct,
| ^^^^^^^^^
@ -105,7 +105,7 @@ LL | T: ~const FnMut<()> + ~const Destruct,
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0015]: cannot call non-const operator in constants
--> $DIR/fn_trait_refs.rs:72:17
--> $DIR/fn_trait_refs.rs:71:17
|
LL | assert!(test_one == (1, 1, 1));
| ^^^^^^^^^^^^^^^^^^^^^
@ -117,7 +117,7 @@ LL + #![feature(effects)]
|
error[E0015]: cannot call non-const operator in constants
--> $DIR/fn_trait_refs.rs:75:17
--> $DIR/fn_trait_refs.rs:74:17
|
LL | assert!(test_two == (2, 2));
| ^^^^^^^^^^^^^^^^^^
@ -129,7 +129,7 @@ LL + #![feature(effects)]
|
error[E0015]: cannot call non-const closure in constant functions
--> $DIR/fn_trait_refs.rs:17:5
--> $DIR/fn_trait_refs.rs:16:5
|
LL | f()
| ^^^
@ -145,7 +145,7 @@ LL + #![feature(effects)]
|
error[E0493]: destructor of `T` cannot be evaluated at compile-time
--> $DIR/fn_trait_refs.rs:13:23
--> $DIR/fn_trait_refs.rs:12:23
|
LL | const fn tester_fn<T>(f: T) -> T::Output
| ^ the destructor for this type cannot be evaluated in constant functions
@ -154,7 +154,7 @@ LL | }
| - value is dropped here
error[E0015]: cannot call non-const closure in constant functions
--> $DIR/fn_trait_refs.rs:24:5
--> $DIR/fn_trait_refs.rs:23:5
|
LL | f()
| ^^^
@ -170,7 +170,7 @@ LL + #![feature(effects)]
|
error[E0493]: destructor of `T` cannot be evaluated at compile-time
--> $DIR/fn_trait_refs.rs:20:27
--> $DIR/fn_trait_refs.rs:19:27
|
LL | const fn tester_fn_mut<T>(mut f: T) -> T::Output
| ^^^^^ the destructor for this type cannot be evaluated in constant functions
@ -179,7 +179,7 @@ LL | }
| - value is dropped here
error[E0015]: cannot call non-const closure in constant functions
--> $DIR/fn_trait_refs.rs:31:5
--> $DIR/fn_trait_refs.rs:30:5
|
LL | f()
| ^^^
@ -195,7 +195,7 @@ LL + #![feature(effects)]
|
error[E0493]: destructor of `T` cannot be evaluated at compile-time
--> $DIR/fn_trait_refs.rs:34:21
--> $DIR/fn_trait_refs.rs:33:21
|
LL | const fn test_fn<T>(mut f: T) -> (T::Output, T::Output, T::Output)
| ^^^^^ the destructor for this type cannot be evaluated in constant functions
@ -204,7 +204,7 @@ LL | }
| - value is dropped here
error[E0493]: destructor of `T` cannot be evaluated at compile-time
--> $DIR/fn_trait_refs.rs:48:25
--> $DIR/fn_trait_refs.rs:47:25
|
LL | const fn test_fn_mut<T>(mut f: T) -> (T::Output, T::Output)
| ^^^^^ the destructor for this type cannot be evaluated in constant functions

6
tests/ui/consts/interior-mut-const-via-union.32bit.stderr
View File

@ -1,5 +1,5 @@
error[E0080]: it is undefined behavior to use this value
--> $DIR/interior-mut-const-via-union.rs:35:1
--> $DIR/interior-mut-const-via-union.rs:34:1
|
LL | fn main() {
| ^^^^^^^^^ constructing invalid value at .<deref>.y.<enum-variant(B)>.0: encountered `UnsafeCell` in read-only memory
@ -10,13 +10,13 @@ LL | fn main() {
}
note: erroneous constant encountered
--> $DIR/interior-mut-const-via-union.rs:37:25
--> $DIR/interior-mut-const-via-union.rs:36:25
|
LL | let _: &'static _ = &C;
| ^^
note: erroneous constant encountered
--> $DIR/interior-mut-const-via-union.rs:37:25
--> $DIR/interior-mut-const-via-union.rs:36:25
|
LL | let _: &'static _ = &C;
| ^^

6
tests/ui/consts/interior-mut-const-via-union.64bit.stderr
View File

@ -1,5 +1,5 @@
error[E0080]: it is undefined behavior to use this value
--> $DIR/interior-mut-const-via-union.rs:35:1
--> $DIR/interior-mut-const-via-union.rs:34:1
|
LL | fn main() {
| ^^^^^^^^^ constructing invalid value at .<deref>.y.<enum-variant(B)>.0: encountered `UnsafeCell` in read-only memory
@ -10,13 +10,13 @@ LL | fn main() {
}
note: erroneous constant encountered
--> $DIR/interior-mut-const-via-union.rs:37:25
--> $DIR/interior-mut-const-via-union.rs:36:25
|
LL | let _: &'static _ = &C;
| ^^
note: erroneous constant encountered
--> $DIR/interior-mut-const-via-union.rs:37:25
--> $DIR/interior-mut-const-via-union.rs:36:25
|
LL | let _: &'static _ = &C;
| ^^

1
tests/ui/consts/interior-mut-const-via-union.rs
View File

@ -3,7 +3,6 @@
//
//@ build-fail
//@ stderr-per-bitwidth
#![feature(const_mut_refs)]
use std::cell::Cell;
use std::mem::ManuallyDrop;

1
tests/ui/consts/issue-17718-const-bad-values.rs
View File

@ -6,6 +6,5 @@
static mut S: usize = 3;
const C2: &'static mut usize = unsafe { &mut S };
//~^ ERROR: referencing statics in constants
//~| ERROR: mutable references are not allowed
fn main() {}

12
tests/ui/consts/issue-17718-const-bad-values.stderr
View File

@ -16,17 +16,7 @@ LL | const C2: &'static mut usize = unsafe { &mut S };
= note: `static` and `const` variables can refer to other `const` variables. A `const` variable, however, cannot refer to a `static` variable.
= help: to fix this, the value can be extracted to a `const` and then used.
error[E0658]: mutable references are not allowed in constants
--> $DIR/issue-17718-const-bad-values.rs:7:41
|
LL | const C2: &'static mut usize = unsafe { &mut S };
| ^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 3 previous errors
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0658, E0764.
For more information about an error, try `rustc --explain E0658`.

1
tests/ui/consts/issue-69488.rs
View File

@ -1,7 +1,6 @@
//@ run-pass
#![feature(const_ptr_write)]
#![feature(const_mut_refs)]
// Or, equivalently: `MaybeUninit`.
pub union BagOfBits<T: Copy> {

1
tests/ui/consts/issue-94371.rs
View File

@ -1,7 +1,6 @@
//@ check-pass
#![feature(const_swap)]
#![feature(const_mut_refs)]
#[repr(C)]
struct Demo(u64, bool, u64, u32, u64, u64, u64);

2
tests/ui/consts/issue-94675.rs
View File

@ -1,6 +1,6 @@
//@ known-bug: #103507
#![feature(const_trait_impl, const_mut_refs)]
#![feature(const_trait_impl)]
struct Foo<'a> {
bar: &'a mut Vec<usize>,

15
tests/ui/consts/min_const_fn/address_of.rs
View File

@ -1,15 +0,0 @@
const fn mutable_address_of_in_const() {
let mut a = 0;
let b = &raw mut a; //~ ERROR mutable pointer
}
struct X;
impl X {
const fn inherent_mutable_address_of_in_const() {
let mut a = 0;
let b = &raw mut a; //~ ERROR mutable pointer
}
}
fn main() {}

23
tests/ui/consts/min_const_fn/address_of.stderr
View File

@ -1,23 +0,0 @@
error[E0658]: raw mutable pointers are not allowed in constant functions
--> $DIR/address_of.rs:3:13
|
LL | let b = &raw mut a;
| ^^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: raw mutable pointers are not allowed in constant functions
--> $DIR/address_of.rs:11:17
|
LL | let b = &raw mut a;
| ^^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0658`.

17
tests/ui/consts/min_const_fn/min_const_fn.rs
View File

@ -37,34 +37,22 @@ const fn new(t: T) -> Self { Foo(t) }
const fn into_inner(self) -> T { self.0 } //~ destructor of
const fn get(&self) -> &T { &self.0 }
const fn get_mut(&mut self) -> &mut T { &mut self.0 }
//~^ mutable references
//~| mutable references
//~| mutable references
}
impl<'a, T> Foo<T> {
const fn new_lt(t: T) -> Self { Foo(t) }
const fn into_inner_lt(self) -> T { self.0 } //~ destructor of
const fn get_lt(&'a self) -> &T { &self.0 } //~ WARNING elided lifetime has a name
const fn get_mut_lt(&'a mut self) -> &mut T { &mut self.0 } //~ WARNING elided lifetime has a name
//~^ mutable references
//~| mutable references
//~| mutable references
const fn get_lt(&self) -> &T { &self.0 }
const fn get_mut_lt(&mut self) -> &mut T { &mut self.0 }
}
impl<T: Sized> Foo<T> {
const fn new_s(t: T) -> Self { Foo(t) }
const fn into_inner_s(self) -> T { self.0 } //~ ERROR destructor
const fn get_s(&self) -> &T { &self.0 }
const fn get_mut_s(&mut self) -> &mut T { &mut self.0 }
//~^ mutable references
//~| mutable references
//~| mutable references
}
impl<T: ?Sized> Foo<T> {
const fn get_sq(&self) -> &T { &self.0 }
const fn get_mut_sq(&mut self) -> &mut T { &mut self.0 }
//~^ mutable references
//~| mutable references
//~| mutable references
}
@ -98,7 +86,6 @@ const fn foo30_2_with_unsafe(x: *mut u32) -> usize { unsafe { x as usize } }
//~^ ERROR pointers cannot be cast to integers
const fn foo30_6() -> bool { let x = true; x }
const fn inc(x: &mut i32) { *x += 1 }
//~^ ERROR mutable references
// ok
const fn foo36(a: bool, b: bool) -> bool { a && b }

172
tests/ui/consts/min_const_fn/min_const_fn.stderr
View File

@ -1,23 +1,3 @@
warning: elided lifetime has a name
--> $DIR/min_const_fn.rs:47:34
|
LL | impl<'a, T> Foo<T> {
| -- lifetime `'a` declared here
...
LL | const fn get_lt(&'a self) -> &T { &self.0 }
| ^ this elided lifetime gets resolved as `'a`
|
= note: `#[warn(elided_named_lifetimes)]` on by default
warning: elided lifetime has a name
--> $DIR/min_const_fn.rs:48:42
|
LL | impl<'a, T> Foo<T> {
| -- lifetime `'a` declared here
...
LL | const fn get_mut_lt(&'a mut self) -> &mut T { &mut self.0 }
| ^ this elided lifetime gets resolved as `'a`
error[E0493]: destructor of `Foo<T>` cannot be evaluated at compile-time
--> $DIR/min_const_fn.rs:37:25
|
@ -26,144 +6,24 @@ LL | const fn into_inner(self) -> T { self.0 }
| |
| the destructor for this type cannot be evaluated in constant functions
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/min_const_fn.rs:39:22
|
LL | const fn get_mut(&mut self) -> &mut T { &mut self.0 }
| ^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/min_const_fn.rs:39:36
|
LL | const fn get_mut(&mut self) -> &mut T { &mut self.0 }
| ^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/min_const_fn.rs:39:45
|
LL | const fn get_mut(&mut self) -> &mut T { &mut self.0 }
| ^^^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0493]: destructor of `Foo<T>` cannot be evaluated at compile-time
--> $DIR/min_const_fn.rs:46:28
--> $DIR/min_const_fn.rs:43:28
|
LL | const fn into_inner_lt(self) -> T { self.0 }
| ^^^^ - value is dropped here
| |
| the destructor for this type cannot be evaluated in constant functions
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/min_const_fn.rs:48:25
|
LL | const fn get_mut_lt(&'a mut self) -> &mut T { &mut self.0 }
| ^^^^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/min_const_fn.rs:48:42
|
LL | const fn get_mut_lt(&'a mut self) -> &mut T { &mut self.0 }
| ^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/min_const_fn.rs:48:51
|
LL | const fn get_mut_lt(&'a mut self) -> &mut T { &mut self.0 }
| ^^^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0493]: destructor of `Foo<T>` cannot be evaluated at compile-time
--> $DIR/min_const_fn.rs:55:27
--> $DIR/min_const_fn.rs:49:27
|
LL | const fn into_inner_s(self) -> T { self.0 }
| ^^^^ - value is dropped here
| |
| the destructor for this type cannot be evaluated in constant functions
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/min_const_fn.rs:57:24
|
LL | const fn get_mut_s(&mut self) -> &mut T { &mut self.0 }
| ^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/min_const_fn.rs:57:38
|
LL | const fn get_mut_s(&mut self) -> &mut T { &mut self.0 }
| ^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/min_const_fn.rs:57:47
|
LL | const fn get_mut_s(&mut self) -> &mut T { &mut self.0 }
| ^^^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/min_const_fn.rs:64:25
|
LL | const fn get_mut_sq(&mut self) -> &mut T { &mut self.0 }
| ^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/min_const_fn.rs:64:39
|
LL | const fn get_mut_sq(&mut self) -> &mut T { &mut self.0 }
| ^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/min_const_fn.rs:64:48
|
LL | const fn get_mut_sq(&mut self) -> &mut T { &mut self.0 }
| ^^^^^^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: referencing statics in constant functions is unstable
--> $DIR/min_const_fn.rs:89:27
--> $DIR/min_const_fn.rs:77:27
|
LL | const fn foo25() -> u32 { BAR }
| ^^^
@ -175,7 +35,7 @@ LL | const fn foo25() -> u32 { BAR }
= help: to fix this, the value can be extracted to a `const` and then used.
error[E0658]: referencing statics in constant functions is unstable
--> $DIR/min_const_fn.rs:90:37
--> $DIR/min_const_fn.rs:78:37
|
LL | const fn foo26() -> &'static u32 { &BAR }
| ^^^
@ -187,7 +47,7 @@ LL | const fn foo26() -> &'static u32 { &BAR }
= help: to fix this, the value can be extracted to a `const` and then used.
error: pointers cannot be cast to integers during const eval
--> $DIR/min_const_fn.rs:91:42
--> $DIR/min_const_fn.rs:79:42
|
LL | const fn foo30(x: *const u32) -> usize { x as usize }
| ^^^^^^^^^^
@ -196,7 +56,7 @@ LL | const fn foo30(x: *const u32) -> usize { x as usize }
= note: avoiding this restriction via `transmute`, `union`, or raw pointers leads to compile-time undefined behavior
error: pointers cannot be cast to integers during const eval
--> $DIR/min_const_fn.rs:93:63
--> $DIR/min_const_fn.rs:81:63
|
LL | const fn foo30_with_unsafe(x: *const u32) -> usize { unsafe { x as usize } }
| ^^^^^^^^^^
@ -205,7 +65,7 @@ LL | const fn foo30_with_unsafe(x: *const u32) -> usize { unsafe { x as usize }
= note: avoiding this restriction via `transmute`, `union`, or raw pointers leads to compile-time undefined behavior
error: pointers cannot be cast to integers during const eval
--> $DIR/min_const_fn.rs:95:42
--> $DIR/min_const_fn.rs:83:42
|
LL | const fn foo30_2(x: *mut u32) -> usize { x as usize }
| ^^^^^^^^^^
@ -214,7 +74,7 @@ LL | const fn foo30_2(x: *mut u32) -> usize { x as usize }
= note: avoiding this restriction via `transmute`, `union`, or raw pointers leads to compile-time undefined behavior
error: pointers cannot be cast to integers during const eval
--> $DIR/min_const_fn.rs:97:63
--> $DIR/min_const_fn.rs:85:63
|
LL | const fn foo30_2_with_unsafe(x: *mut u32) -> usize { unsafe { x as usize } }
| ^^^^^^^^^^
@ -222,18 +82,8 @@ LL | const fn foo30_2_with_unsafe(x: *mut u32) -> usize { unsafe { x as usize }
= note: at compile-time, pointers do not have an integer value
= note: avoiding this restriction via `transmute`, `union`, or raw pointers leads to compile-time undefined behavior
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/min_const_fn.rs:100:14
|
LL | const fn inc(x: &mut i32) { *x += 1 }
| ^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0493]: destructor of `AlanTuring<impl std::fmt::Debug>` cannot be evaluated at compile-time
--> $DIR/min_const_fn.rs:122:19
--> $DIR/min_const_fn.rs:109:19
|
LL | const fn no_apit2(_x: AlanTuring<impl std::fmt::Debug>) {}
| ^^ - value is dropped here
@ -241,14 +91,14 @@ LL | const fn no_apit2(_x: AlanTuring<impl std::fmt::Debug>) {}
| the destructor for this type cannot be evaluated in constant functions
error[E0493]: destructor of `impl std::fmt::Debug` cannot be evaluated at compile-time
--> $DIR/min_const_fn.rs:124:18
--> $DIR/min_const_fn.rs:111:18
|
LL | const fn no_apit(_x: impl std::fmt::Debug) {}
| ^^ - value is dropped here
| |
| the destructor for this type cannot be evaluated in constant functions
error: aborting due to 24 previous errors; 2 warnings emitted
error: aborting due to 11 previous errors
Some errors have detailed explanations: E0493, E0658.
For more information about an error, try `rustc --explain E0493`.

13
tests/ui/consts/min_const_fn/min_const_fn_unsafe_bad.rs
View File

@ -1,13 +0,0 @@
const fn bad_const_fn_deref_raw(x: *mut usize) -> &'static usize { unsafe { &*x } }
//~^ dereferencing raw mutable pointers in constant functions
const unsafe fn bad_const_unsafe_deref_raw(x: *mut usize) -> usize { *x }
//~^ dereferencing raw mutable pointers in constant functions
const unsafe fn bad_const_unsafe_deref_raw_ref(x: *mut usize) -> &'static usize { &*x }
//~^ dereferencing raw mutable pointers in constant functions
const unsafe fn bad_const_unsafe_deref_raw_underscore(x: *mut usize) { let _ = *x; }
//~^ dereferencing raw mutable pointers in constant functions
fn main() {}

43
tests/ui/consts/min_const_fn/min_const_fn_unsafe_bad.stderr
View File

@ -1,43 +0,0 @@
error[E0658]: dereferencing raw mutable pointers in constant functions is unstable
--> $DIR/min_const_fn_unsafe_bad.rs:1:77
|
LL | const fn bad_const_fn_deref_raw(x: *mut usize) -> &'static usize { unsafe { &*x } }
| ^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: dereferencing raw mutable pointers in constant functions is unstable
--> $DIR/min_const_fn_unsafe_bad.rs:4:70
|
LL | const unsafe fn bad_const_unsafe_deref_raw(x: *mut usize) -> usize { *x }
| ^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: dereferencing raw mutable pointers in constant functions is unstable
--> $DIR/min_const_fn_unsafe_bad.rs:7:83
|
LL | const unsafe fn bad_const_unsafe_deref_raw_ref(x: *mut usize) -> &'static usize { &*x }
| ^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: dereferencing raw mutable pointers in constant functions is unstable
--> $DIR/min_const_fn_unsafe_bad.rs:10:80
|
LL | const unsafe fn bad_const_unsafe_deref_raw_underscore(x: *mut usize) { let _ = *x; }
| ^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 4 previous errors
For more information about this error, try `rustc --explain E0658`.

8
tests/ui/consts/min_const_fn/min_const_fn_unsafe_ok.rs
View File

@ -41,4 +41,12 @@ const fn call_unsafe_generic_cell_const_fn()
ret_null_mut_ptr_no_unsafe::<Vec<std::cell::Cell<u32>>>()
}
const fn bad_const_fn_deref_raw(x: *mut usize) -> &'static usize { unsafe { &*x } }
const unsafe fn bad_const_unsafe_deref_raw(x: *mut usize) -> usize { *x }
const unsafe fn bad_const_unsafe_deref_raw_ref(x: *mut usize) -> &'static usize { &*x }
const unsafe fn bad_const_unsafe_deref_raw_underscore(x: *mut usize) { let _ = *x; }
fn main() {}

17
tests/ui/consts/min_const_fn/mutable_borrow.rs
View File

@ -1,17 +0,0 @@
const fn mutable_ref_in_const() -> u8 {
let mut a = 0;
let b = &mut a; //~ ERROR mutable references
*b
}
struct X;
impl X {
const fn inherent_mutable_ref_in_const() -> u8 {
let mut a = 0;
let b = &mut a; //~ ERROR mutable references
*b
}
}
fn main() {}

23
tests/ui/consts/min_const_fn/mutable_borrow.stderr
View File

@ -1,23 +0,0 @@
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/mutable_borrow.rs:3:13
|
LL | let b = &mut a;
| ^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: mutable references are not allowed in constant functions
--> $DIR/mutable_borrow.rs:12:17
|
LL | let b = &mut a;
| ^^^^^^
|
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0658`.

10
tests/ui/consts/miri_unleashed/box.stderr
View File

@ -11,16 +11,6 @@ help: skipping check that does not even have a feature gate
|
LL | &mut *(Box::new(0))
| ^^^^^^^^^^^^^
help: skipping check for `const_mut_refs` feature
--> $DIR/box.rs:8:5
|
LL | &mut *(Box::new(0))
| ^^^^^^^^^^^^^^^^^^^
help: skipping check for `const_mut_refs` feature
--> $DIR/box.rs:8:5
|
LL | &mut *(Box::new(0))
| ^^^^^^^^^^^^^^^^^^^
error: aborting due to 1 previous error; 1 warning emitted

15
tests/ui/consts/miri_unleashed/mutable_references.stderr
View File

@ -177,11 +177,6 @@ help: skipping check for `const_refs_to_static` feature
|
LL | const SUBTLE: &mut i32 = unsafe { static mut STATIC: i32 = 0; &mut STATIC };
| ^^^^^^
help: skipping check for `const_mut_refs` feature
--> $DIR/mutable_references.rs:30:63
|
LL | const SUBTLE: &mut i32 = unsafe { static mut STATIC: i32 = 0; &mut STATIC };
| ^^^^^^^^^^^
help: skipping check that does not even have a feature gate
--> $DIR/mutable_references.rs:40:28
|
@ -197,16 +192,6 @@ help: skipping check that does not even have a feature gate
|
LL | const SNEAKY: &dyn Sync = &Synced { x: UnsafeCell::new(42) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
help: skipping check for `const_mut_refs` feature
--> $DIR/mutable_references.rs:65:49
|
LL | static mut MUT_TO_READONLY: &mut i32 = unsafe { &mut *(&READONLY as *const _ as *mut _) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
help: skipping check for `const_mut_refs` feature
--> $DIR/mutable_references.rs:65:49
|
LL | static mut MUT_TO_READONLY: &mut i32 = unsafe { &mut *(&READONLY as *const _ as *mut _) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
help: skipping check for `const_refs_to_static` feature
--> $DIR/mutable_references.rs:72:43
|

2
tests/ui/consts/miri_unleashed/static-no-inner-mut.rs
View File

@ -1,6 +1,6 @@
//@ stderr-per-bitwidth
//@ compile-flags: -Zunleash-the-miri-inside-of-you
#![feature(const_refs_to_cell, const_mut_refs)]
// All "inner" allocations that come with a `static` are interned immutably. This means it is
// crucial that we do not accept any form of (interior) mutability there.
use std::sync::atomic::*;

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