mikros/rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Auto merge of #108301 - Dylan-DPC:rollup-70zpkt0, r=Dylan-DPC

Browse Source 
Rollup of 7 pull requests

Successful merges:

 - #108000 (lint: don't suggest MaybeUninit::assume_init for uninhabited types)
 - #108105 (Explain the default panic hook better)
 - #108141 (Add rpitit queries)
 - #108272 (docs: wrong naming convention in struct keyword doc)
 - #108285 (remove unstable `pick_stable_methods_before_any_unstable` flag)
 - #108289 (Name placeholder in some region errors)
 - #108290 (Add a test for default trait method with RPITITs)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
This commit is contained in:
bors 2023-02-21 09:51:03 +00:00
commit bda32a4023
27 changed files with 429 additions and 323 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
compiler/rustc_hir/src/definitions.rs
View File

@ -280,6 +280,8 @@ pub enum DefPathData {
AnonConst,
/// An `impl Trait` type node.
ImplTrait,
/// `impl Trait` generated associated type node.
ImplTraitAssocTy,
}
impl Definitions {
@ -403,7 +405,7 @@ pub fn get_opt_name(&self) -> Option<Symbol> {
TypeNs(name) | ValueNs(name) | MacroNs(name) | LifetimeNs(name) => Some(name),
Impl | ForeignMod | CrateRoot | Use | GlobalAsm | ClosureExpr | Ctor | AnonConst
| ImplTrait => None,
| ImplTrait | ImplTraitAssocTy => None,
}
}
@ -422,7 +424,7 @@ pub fn name(&self) -> DefPathDataName {
ClosureExpr => DefPathDataName::Anon { namespace: sym::closure },
Ctor => DefPathDataName::Anon { namespace: sym::constructor },
AnonConst => DefPathDataName::Anon { namespace: sym::constant },
ImplTrait => DefPathDataName::Anon { namespace: sym::opaque },
ImplTrait | ImplTraitAssocTy => DefPathDataName::Anon { namespace: sym::opaque },
}
}
}

56
compiler/rustc_hir_typeck/src/method/probe.rs
View File

@ -1095,17 +1095,8 @@ fn pick(mut self) -> PickResult<'tcx> {
}
fn pick_core(&self) -> Option<PickResult<'tcx>> {
let pick = self.pick_all_method(Some(&mut vec![]));
// In this case unstable picking is done by `pick_method`.
if !self.tcx.sess.opts.unstable_opts.pick_stable_methods_before_any_unstable {
return pick;
}
if pick.is_none() {
return self.pick_all_method(None);
}
pick
// Pick stable methods only first, and consider unstable candidates if not found.
self.pick_all_method(Some(&mut vec![])).or_else(|| self.pick_all_method(None))
}
fn pick_all_method(
@ -1244,54 +1235,11 @@ fn pick_const_ptr_method(
})
}
fn pick_method_with_unstable(&self, self_ty: Ty<'tcx>) -> Option<PickResult<'tcx>> {
debug!("pick_method_with_unstable(self_ty={})", self.ty_to_string(self_ty));
let mut possibly_unsatisfied_predicates = Vec::new();
for (kind, candidates) in
&[("inherent", &self.inherent_candidates), ("extension", &self.extension_candidates)]
{
debug!("searching {} candidates", kind);
let res = self.consider_candidates(
self_ty,
candidates,
&mut possibly_unsatisfied_predicates,
Some(&mut vec![]),
);
if res.is_some() {
return res;
}
}
for (kind, candidates) in
&[("inherent", &self.inherent_candidates), ("extension", &self.extension_candidates)]
{
debug!("searching unstable {kind} candidates");
let res = self.consider_candidates(
self_ty,
candidates,
&mut possibly_unsatisfied_predicates,
None,
);
if res.is_some() {
return res;
}
}
self.unsatisfied_predicates.borrow_mut().extend(possibly_unsatisfied_predicates);
None
}
fn pick_method(
&self,
self_ty: Ty<'tcx>,
mut unstable_candidates: Option<&mut Vec<(Candidate<'tcx>, Symbol)>>,
) -> Option<PickResult<'tcx>> {
if !self.tcx.sess.opts.unstable_opts.pick_stable_methods_before_any_unstable {
return self.pick_method_with_unstable(self_ty);
}
debug!("pick_method(self_ty={})", self.ty_to_string(self_ty));
let mut possibly_unsatisfied_predicates = Vec::new();

27
compiler/rustc_infer/src/infer/error_reporting/mod.rs
View File

@ -129,21 +129,16 @@ pub(super) fn note_and_explain_region<'tcx>(
alt_span: Option<Span>,
) {
let (description, span) = match *region {
ty::ReEarlyBound(_) | ty::ReFree(_) | ty::ReStatic => {
msg_span_from_free_region(tcx, region, alt_span)
ty::ReEarlyBound(_) | ty::ReFree(_) | ty::RePlaceholder(_) | ty::ReStatic => {
msg_span_from_named_region(tcx, region, alt_span)
}
ty::RePlaceholder(_) => return,
ty::ReError(_) => return,
// FIXME(#13998) RePlaceholder should probably print like
// ReFree rather than dumping Debug output on the user.
//
// We shouldn't really be having unification failures with ReVar
// and ReLateBound though.
ty::ReVar(_) | ty::ReLateBound(..) | ty::ReErased => {
(format!("lifetime {:?}", region), alt_span)
(format!("lifetime `{region}`"), alt_span)
}
};
@ -157,12 +152,12 @@ fn explain_free_region<'tcx>(
region: ty::Region<'tcx>,
suffix: &str,
) {
let (description, span) = msg_span_from_free_region(tcx, region, None);
let (description, span) = msg_span_from_named_region(tcx, region, None);
label_msg_span(err, prefix, description, span, suffix);
}
fn msg_span_from_free_region<'tcx>(
fn msg_span_from_named_region<'tcx>(
tcx: TyCtxt<'tcx>,
region: ty::Region<'tcx>,
alt_span: Option<Span>,
@ -173,6 +168,18 @@ fn msg_span_from_free_region<'tcx>(
(msg, Some(span))
}
ty::ReStatic => ("the static lifetime".to_owned(), alt_span),
ty::RePlaceholder(ty::PlaceholderRegion {
name: ty::BoundRegionKind::BrNamed(def_id, name),
..
}) => (format!("the lifetime `{name}` as defined here"), Some(tcx.def_span(def_id))),
ty::RePlaceholder(ty::PlaceholderRegion {
name: ty::BoundRegionKind::BrAnon(_, Some(span)),
..
}) => (format!("the anonymous lifetime defined here"), Some(span)),
ty::RePlaceholder(ty::PlaceholderRegion {
name: ty::BoundRegionKind::BrAnon(_, None),
..
}) => (format!("an anonymous lifetime"), None),
_ => bug!("{:?}", region),
}
}

1
compiler/rustc_interface/src/tests.rs
View File

@ -776,7 +776,6 @@ macro_rules! tracked {
tracked!(packed_bundled_libs, true);
tracked!(panic_abort_tests, true);
tracked!(panic_in_drop, PanicStrategy::Abort);
tracked!(pick_stable_methods_before_any_unstable, false);
tracked!(plt, Some(true));
tracked!(polonius, true);
tracked!(precise_enum_drop_elaboration, false);

8
compiler/rustc_lint/src/builtin.rs
View File

@ -2635,7 +2635,13 @@ fn ty_find_init_error<'tcx>(
cx.emit_spanned_lint(
INVALID_VALUE,
expr.span,
BuiltinUnpermittedTypeInit { msg, ty: conjured_ty, label: expr.span, sub },
BuiltinUnpermittedTypeInit {
msg,
ty: conjured_ty,
label: expr.span,
sub,
tcx: cx.tcx,
},
);
}
}

13
compiler/rustc_lint/src/lints.rs
View File

@ -8,7 +8,9 @@
};
use rustc_hir::def_id::DefId;
use rustc_macros::{LintDiagnostic, Subdiagnostic};
use rustc_middle::ty::{PolyExistentialTraitRef, Predicate, Ty, TyCtxt};
use rustc_middle::ty::{
inhabitedness::InhabitedPredicate, PolyExistentialTraitRef, Predicate, Ty, TyCtxt,
};
use rustc_session::parse::ParseSess;
use rustc_span::{edition::Edition, sym, symbol::Ident, Span, Symbol};
@ -419,6 +421,7 @@ pub struct BuiltinUnpermittedTypeInit<'a> {
pub ty: Ty<'a>,
pub label: Span,
pub sub: BuiltinUnpermittedTypeInitSub,
pub tcx: TyCtxt<'a>,
}
impl<'a> DecorateLint<'a, ()> for BuiltinUnpermittedTypeInit<'_> {
@ -428,7 +431,13 @@ fn decorate_lint<'b>(
) -> &'b mut rustc_errors::DiagnosticBuilder<'a, ()> {
diag.set_arg("ty", self.ty);
diag.span_label(self.label, fluent::lint_builtin_unpermitted_type_init_label);
diag.span_label(self.label, fluent::lint_builtin_unpermitted_type_init_label_suggestion);
if let InhabitedPredicate::True = self.ty.inhabited_predicate(self.tcx) {
// Only suggest late `MaybeUninit::assume_init` initialization if the type is inhabited.
diag.span_label(
self.label,
fluent::lint_builtin_unpermitted_type_init_label_suggestion,
);
}
self.sub.add_to_diagnostic(diag);
diag
}

2
compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs
View File

@ -254,6 +254,8 @@ fn into_args(self) -> (DefId, SimplifiedType) {
.process_decoded(tcx, || panic!("{def_id:?} does not have trait_impl_trait_tys")))
}
associated_items_for_impl_trait_in_trait => { table_defaulted_array }
visibility => { cdata.get_visibility(def_id.index) }
adt_def => { cdata.get_adt_def(def_id.index, tcx) }
adt_destructor => {

13
compiler/rustc_metadata/src/rmeta/encoder.rs
View File

@ -1129,6 +1129,11 @@ fn should_encode_trait_impl_trait_tys(tcx: TyCtxt<'_>, def_id: DefId) -> bool {
})
}
// Return `false` to avoid encoding impl trait in trait, while we don't use the query.
fn should_encode_fn_impl_trait_in_trait<'tcx>(_tcx: TyCtxt<'tcx>, _def_id: DefId) -> bool {
false
}
impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
fn encode_attrs(&mut self, def_id: LocalDefId) {
let tcx = self.tcx;
@ -1137,8 +1142,8 @@ fn encode_attrs(&mut self, def_id: LocalDefId) {
is_doc_hidden: false,
};
let attr_iter = tcx
.hir()
.attrs(tcx.hir().local_def_id_to_hir_id(def_id))
.opt_local_def_id_to_hir_id(def_id)
.map_or(Default::default(), |hir_id| tcx.hir().attrs(hir_id))
.iter()
.filter(|attr| analyze_attr(attr, &mut state));
@ -1211,6 +1216,10 @@ fn encode_def_ids(&mut self) {
{
record!(self.tables.trait_impl_trait_tys[def_id] <- table);
}
if should_encode_fn_impl_trait_in_trait(tcx, def_id) {
let table = tcx.associated_items_for_impl_trait_in_trait(def_id);
record_defaulted_array!(self.tables.associated_items_for_impl_trait_in_trait[def_id] <- table);
}
}
let inherent_impls = tcx.with_stable_hashing_context(|hcx| {

1
compiler/rustc_metadata/src/rmeta/mod.rs
View File

@ -354,6 +354,7 @@ fn encode(&self, buf: &mut FileEncoder) -> LazyTables {
explicit_item_bounds: Table<DefIndex, LazyArray<(ty::Predicate<'static>, Span)>>,
inferred_outlives_of: Table<DefIndex, LazyArray<(ty::Clause<'static>, Span)>>,
inherent_impls: Table<DefIndex, LazyArray<DefIndex>>,
associated_items_for_impl_trait_in_trait: Table<DefIndex, LazyArray<DefId>>,
- optional:
attributes: Table<DefIndex, LazyArray<ast::Attribute>>,

7
compiler/rustc_middle/src/hir/map/mod.rs
View File

@ -849,6 +849,13 @@ pub fn expect_trait_item(self, id: LocalDefId) -> &'hir TraitItem<'hir> {
}
}
pub fn get_fn_output(self, def_id: LocalDefId) -> Option<&'hir FnRetTy<'hir>> {
match self.tcx.hir_owner(OwnerId { def_id }) {
Some(Owner { node, .. }) => node.fn_decl().map(|fn_decl| &fn_decl.output),
_ => None,
}
}
pub fn expect_variant(self, id: HirId) -> &'hir Variant<'hir> {
match self.find(id) {
Some(Node::Variant(variant)) => variant,

6
compiler/rustc_middle/src/hir/mod.rs
View File

@ -121,13 +121,13 @@ pub fn provide(providers: &mut Providers) {
let node = owner.node();
Some(Owner { node, hash_without_bodies: owner.nodes.hash_without_bodies })
};
providers.local_def_id_to_hir_id = |tcx, id| {
providers.opt_local_def_id_to_hir_id = |tcx, id| {
let owner = tcx.hir_crate(()).owners[id].map(|_| ());
match owner {
Some(match owner {
MaybeOwner::Owner(_) => HirId::make_owner(id),
MaybeOwner::Phantom => bug!("No HirId for {:?}", id),
MaybeOwner::NonOwner(hir_id) => hir_id,
}
})
};
providers.hir_owner_nodes = |tcx, id| tcx.hir_crate(()).owners[id.def_id].map(|i| &i.nodes);
providers.hir_owner_parent = |tcx, id| {

27
compiler/rustc_middle/src/query/mod.rs
View File

@ -85,11 +85,10 @@
desc { |tcx| "getting HIR owner of `{}`", tcx.def_path_str(key.to_def_id()) }
}
/// Gives access to the HIR ID for the given `LocalDefId` owner `key`.
/// Gives access to the HIR ID for the given `LocalDefId` owner `key` if any.
///
/// This can be conveniently accessed by methods on `tcx.hir()`.
/// Avoid calling this query directly.
query local_def_id_to_hir_id(key: LocalDefId) -> hir::HirId {
/// Definitions that were generated with no HIR, would be feeded to return `None`.
query opt_local_def_id_to_hir_id(key: LocalDefId) -> Option<hir::HirId>{
desc { |tcx| "getting HIR ID of `{}`", tcx.def_path_str(key.to_def_id()) }
}
@ -767,6 +766,26 @@
desc { |tcx| "comparing impl items against trait for `{}`", tcx.def_path_str(impl_id) }
}
/// Given `fn_def_id` of a trait or of an impl that implements a given trait:
/// if `fn_def_id` is the def id of a function defined inside a trait, then it creates and returns
/// the associated items that correspond to each impl trait in return position for that trait.
/// if `fn_def_id` is the def id of a function defined inside an impl that implements a trait, then it
/// creates and returns the associated items that correspond to each impl trait in return position
/// of the implemented trait.
query associated_items_for_impl_trait_in_trait(fn_def_id: DefId) -> &'tcx [DefId] {
desc { |tcx| "creating associated items for impl trait in trait returned by `{}`", tcx.def_path_str(fn_def_id) }
cache_on_disk_if { fn_def_id.is_local() }
separate_provide_extern
}
/// Given an impl trait in trait `opaque_ty_def_id`, create and return the corresponding
/// associated item.
query associated_item_for_impl_trait_in_trait(opaque_ty_def_id: LocalDefId) -> LocalDefId {
desc { |tcx| "creates the associated item corresponding to the opaque type `{}`", tcx.def_path_str(opaque_ty_def_id.to_def_id()) }
cache_on_disk_if { true }
separate_provide_extern
}
/// Given an `impl_id`, return the trait it implements.
/// Return `None` if this is an inherent impl.
query impl_trait_ref(impl_id: DefId) -> Option<ty::EarlyBinder<ty::TraitRef<'tcx>>> {

4
compiler/rustc_middle/src/ty/context.rs
View File

@ -2451,6 +2451,10 @@ pub fn is_const_trait_impl_raw(self, def_id: DefId) -> bool {
)
}
pub fn local_def_id_to_hir_id(self, local_def_id: LocalDefId) -> HirId {
self.opt_local_def_id_to_hir_id(local_def_id).unwrap()
}
pub fn trait_solver_next(self) -> bool {
self.sess.opts.unstable_opts.trait_solver == rustc_session::config::TraitSolver::Next
}

2
compiler/rustc_session/src/options.rs
View File

@ -1567,8 +1567,6 @@ pub(crate) fn parse_proc_macro_execution_strategy(
"parse only; do not compile, assemble, or link (default: no)"),
perf_stats: bool = (false, parse_bool, [UNTRACKED],
"print some performance-related statistics (default: no)"),
pick_stable_methods_before_any_unstable: bool = (true, parse_bool, [TRACKED],
"try to pick stable methods first before picking any unstable methods (default: yes)"),
plt: Option<bool> = (None, parse_opt_bool, [TRACKED],
"whether to use the PLT when calling into shared libraries;
only has effect for PIC code on systems with ELF binaries

1
compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs
View File

@ -396,6 +396,7 @@ fn encode_ty_name(tcx: TyCtxt<'_>, def_id: DefId) -> String {
hir::definitions::DefPathData::CrateRoot
| hir::definitions::DefPathData::Use
| hir::definitions::DefPathData::GlobalAsm
| hir::definitions::DefPathData::ImplTraitAssocTy
| hir::definitions::DefPathData::MacroNs(..)
| hir::definitions::DefPathData::LifetimeNs(..) => {
bug!("encode_ty_name: unexpected `{:?}`", disambiguated_data.data);

1
compiler/rustc_symbol_mangling/src/v0.rs
View File

@ -791,6 +791,7 @@ fn path_append(
| DefPathData::Use
| DefPathData::GlobalAsm
| DefPathData::Impl
| DefPathData::ImplTraitAssocTy
| DefPathData::MacroNs(_)
| DefPathData::LifetimeNs(_) => {
bug!("symbol_names: unexpected DefPathData: {:?}", disambiguated_data.data)

103
compiler/rustc_ty_utils/src/assoc.rs
View File

@ -1,13 +1,18 @@
use rustc_data_structures::fx::FxHashMap;
use rustc_hir as hir;
use rustc_hir::def_id::DefId;
use rustc_middle::ty::{self, TyCtxt};
use rustc_hir::def::DefKind;
use rustc_hir::def_id::{DefId, LocalDefId};
use rustc_hir::definitions::DefPathData;
use rustc_hir::intravisit::{self, Visitor};
use rustc_middle::ty::{self, DefIdTree, TyCtxt};
pub fn provide(providers: &mut ty::query::Providers) {
*providers = ty::query::Providers {
associated_item,
associated_item_def_ids,
associated_items,
associated_items_for_impl_trait_in_trait,
associated_item_for_impl_trait_in_trait,
impl_item_implementor_ids,
..*providers
};
@ -112,3 +117,97 @@ fn associated_item_from_impl_item_ref(impl_item_ref: &hir::ImplItemRef) -> ty::A
fn_has_self_parameter: has_self,
}
}
/// Given an `fn_def_id` of a trait or of an impl that implements a given trait:
/// if `fn_def_id` is the def id of a function defined inside a trait, then it creates and returns
/// the associated items that correspond to each impl trait in return position for that trait.
/// if `fn_def_id` is the def id of a function defined inside an impl that implements a trait, then it
/// creates and returns the associated items that correspond to each impl trait in return position
/// of the implemented trait.
fn associated_items_for_impl_trait_in_trait(tcx: TyCtxt<'_>, fn_def_id: DefId) -> &'_ [DefId] {
let parent_def_id = tcx.parent(fn_def_id);
match tcx.def_kind(parent_def_id) {
DefKind::Trait => {
struct RPITVisitor {
rpits: Vec<LocalDefId>,
}
impl<'v> Visitor<'v> for RPITVisitor {
fn visit_ty(&mut self, ty: &'v hir::Ty<'v>) {
if let hir::TyKind::OpaqueDef(item_id, _, _) = ty.kind {
self.rpits.push(item_id.owner_id.def_id)
}
intravisit::walk_ty(self, ty)
}
}
let mut visitor = RPITVisitor { rpits: Vec::new() };
if let Some(output) = tcx.hir().get_fn_output(fn_def_id.expect_local()) {
visitor.visit_fn_ret_ty(output);
tcx.arena.alloc_from_iter(visitor.rpits.iter().map(|opaque_ty_def_id| {
tcx.associated_item_for_impl_trait_in_trait(opaque_ty_def_id).to_def_id()
}))
} else {
&[]
}
}
DefKind::Impl { .. } => {
let Some(trait_fn_def_id) = tcx.associated_item(fn_def_id).trait_item_def_id else { return &[] };
tcx.arena.alloc_from_iter(
tcx.associated_items_for_impl_trait_in_trait(trait_fn_def_id).iter().map(
move |trait_assoc_def_id| {
impl_associated_item_for_impl_trait_in_trait(
tcx,
trait_assoc_def_id.expect_local(),
fn_def_id.expect_local(),
)
.to_def_id()
},
),
)
}
def_kind => bug!(
"associated_items_for_impl_trait_in_trait: {:?} should be Trait or Impl but is {:?}",
parent_def_id,
def_kind
),
}
}
/// Given an `opaque_ty_def_id` corresponding to an impl trait in trait, create and return the
/// corresponding associated item.
fn associated_item_for_impl_trait_in_trait(
tcx: TyCtxt<'_>,
opaque_ty_def_id: LocalDefId,
) -> LocalDefId {
let fn_def_id = tcx.impl_trait_in_trait_parent(opaque_ty_def_id.to_def_id());
let trait_def_id = tcx.parent(fn_def_id);
assert_eq!(tcx.def_kind(trait_def_id), DefKind::Trait);
let span = tcx.def_span(opaque_ty_def_id);
let trait_assoc_ty =
tcx.at(span).create_def(trait_def_id.expect_local(), DefPathData::ImplTraitAssocTy);
trait_assoc_ty.def_id()
}
/// Given an `trait_assoc_def_id` that corresponds to a previously synthethized impl trait in trait
/// into an associated type and an `impl_def_id` corresponding to an impl block, create and return
/// the corresponding associated item inside the impl block.
fn impl_associated_item_for_impl_trait_in_trait(
tcx: TyCtxt<'_>,
trait_assoc_def_id: LocalDefId,
impl_fn_def_id: LocalDefId,
) -> LocalDefId {
let impl_def_id = tcx.local_parent(impl_fn_def_id);
let span = tcx.def_span(trait_assoc_def_id);
let impl_assoc_ty = tcx.at(span).create_def(impl_def_id, DefPathData::ImplTraitAssocTy);
impl_assoc_ty.def_id()
}

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

@ -1568,7 +1568,7 @@ mod static_keyword {}
///
/// # Style conventions
///
/// Structs are always written in CamelCase, with few exceptions. While the trailing comma on a
/// Structs are always written in UpperCamelCase, with few exceptions. While the trailing comma on a
/// struct's list of fields can be omitted, it's usually kept for convenience in adding and
/// removing fields down the line.
///

16
library/std/src/panicking.rs
View File

@ -95,13 +95,16 @@ fn default() -> Hook {
static HOOK: RwLock<Hook> = RwLock::new(Hook::Default);
/// Registers a custom panic hook, replacing any that was previously registered.
/// Registers a custom panic hook, replacing the previously registered hook.
///
/// The panic hook is invoked when a thread panics, but before the panic runtime
/// is invoked. As such, the hook will run with both the aborting and unwinding
/// runtimes. The default hook prints a message to standard error and generates
/// a backtrace if requested, but this behavior can be customized with the
/// `set_hook` and [`take_hook`] functions.
/// runtimes.
///
/// The default hook, which is registered at startup, prints a message to standard error and
/// generates a backtrace if requested. This behavior can be customized using the `set_hook` function.
/// The current hook can be retrieved while reinstating the default hook with the [`take_hook`]
/// function.
///
/// [`take_hook`]: ./fn.take_hook.html
///
@ -143,13 +146,14 @@ pub fn set_hook(hook: Box<dyn Fn(&PanicInfo<'_>) + 'static + Sync + Send>) {
drop(old);
}
/// Unregisters the current panic hook, returning it.
/// Unregisters the current panic hook and returns it, registering the default hook
/// in its place.
///
/// *See also the function [`set_hook`].*
///
/// [`set_hook`]: ./fn.set_hook.html
///
/// If no custom hook is registered, the default hook will be returned.
/// If the default hook is registered it will be returned, but remain registered.
///
/// # Panics
///

353
tests/rustdoc-ui/z-help.stdout
View File

@ -1,76 +1,76 @@
-Z allow-features=val -- only allow the listed language features to be enabled in code (comma separated)
-Z always-encode-mir=val -- encode MIR of all functions into the crate metadata (default: no)
-Z asm-comments=val -- generate comments into the assembly (may change behavior) (default: no)
-Z assert-incr-state=val -- assert that the incremental cache is in given state: either `loaded` or `not-loaded`.
-Z assume-incomplete-release=val -- make cfg(version) treat the current version as incomplete (default: no)
-Z binary-dep-depinfo=val -- include artifacts (sysroot, crate dependencies) used during compilation in dep-info (default: no)
-Z box-noalias=val -- emit noalias metadata for box (default: yes)
-Z branch-protection=val -- set options for branch target identification and pointer authentication on AArch64
-Z cf-protection=val -- instrument control-flow architecture protection
-Z cgu-partitioning-strategy=val -- the codegen unit partitioning strategy to use
-Z codegen-backend=val -- the backend to use
-Z combine-cgu=val -- combine CGUs into a single one
-Z crate-attr=val -- inject the given attribute in the crate
-Z debug-info-for-profiling=val -- emit discriminators and other data necessary for AutoFDO
-Z debug-macros=val -- emit line numbers debug info inside macros (default: no)
-Z deduplicate-diagnostics=val -- deduplicate identical diagnostics (default: yes)
-Z dep-info-omit-d-target=val -- in dep-info output, omit targets for tracking dependencies of the dep-info files themselves (default: no)
-Z dep-tasks=val -- print tasks that execute and the color their dep node gets (requires debug build) (default: no)
-Z diagnostic-width=val -- set the current output width for diagnostic truncation
-Z dlltool=val -- import library generation tool (windows-gnu only)
-Z dont-buffer-diagnostics=val -- emit diagnostics rather than buffering (breaks NLL error downgrading, sorting) (default: no)
-Z drop-tracking=val -- enables drop tracking in generators (default: no)
-Z drop-tracking-mir=val -- enables drop tracking on MIR in generators (default: no)
-Z dual-proc-macros=val -- load proc macros for both target and host, but only link to the target (default: no)
-Z dump-dep-graph=val -- dump the dependency graph to $RUST_DEP_GRAPH (default: /tmp/dep_graph.gv) (default: no)
-Z dump-drop-tracking-cfg=val -- dump drop-tracking control-flow graph as a `.dot` file (default: no)
-Z dump-mir=val -- dump MIR state to file.
-Z allow-features=val -- only allow the listed language features to be enabled in code (comma separated)
-Z always-encode-mir=val -- encode MIR of all functions into the crate metadata (default: no)
-Z asm-comments=val -- generate comments into the assembly (may change behavior) (default: no)
-Z assert-incr-state=val -- assert that the incremental cache is in given state: either `loaded` or `not-loaded`.
-Z assume-incomplete-release=val -- make cfg(version) treat the current version as incomplete (default: no)
-Z binary-dep-depinfo=val -- include artifacts (sysroot, crate dependencies) used during compilation in dep-info (default: no)
-Z box-noalias=val -- emit noalias metadata for box (default: yes)
-Z branch-protection=val -- set options for branch target identification and pointer authentication on AArch64
-Z cf-protection=val -- instrument control-flow architecture protection
-Z cgu-partitioning-strategy=val -- the codegen unit partitioning strategy to use
-Z codegen-backend=val -- the backend to use
-Z combine-cgu=val -- combine CGUs into a single one
-Z crate-attr=val -- inject the given attribute in the crate
-Z debug-info-for-profiling=val -- emit discriminators and other data necessary for AutoFDO
-Z debug-macros=val -- emit line numbers debug info inside macros (default: no)
-Z deduplicate-diagnostics=val -- deduplicate identical diagnostics (default: yes)
-Z dep-info-omit-d-target=val -- in dep-info output, omit targets for tracking dependencies of the dep-info files themselves (default: no)
-Z dep-tasks=val -- print tasks that execute and the color their dep node gets (requires debug build) (default: no)
-Z diagnostic-width=val -- set the current output width for diagnostic truncation
-Z dlltool=val -- import library generation tool (windows-gnu only)
-Z dont-buffer-diagnostics=val -- emit diagnostics rather than buffering (breaks NLL error downgrading, sorting) (default: no)
-Z drop-tracking=val -- enables drop tracking in generators (default: no)
-Z drop-tracking-mir=val -- enables drop tracking on MIR in generators (default: no)
-Z dual-proc-macros=val -- load proc macros for both target and host, but only link to the target (default: no)
-Z dump-dep-graph=val -- dump the dependency graph to $RUST_DEP_GRAPH (default: /tmp/dep_graph.gv) (default: no)
-Z dump-drop-tracking-cfg=val -- dump drop-tracking control-flow graph as a `.dot` file (default: no)
-Z dump-mir=val -- dump MIR state to file.
`val` is used to select which passes and functions to dump. For example:
`all` matches all passes and functions,
`foo` matches all passes for functions whose name contains 'foo',
`foo & ConstProp` only the 'ConstProp' pass for function names containing 'foo',
`foo | bar` all passes for function names containing 'foo' or 'bar'.
-Z dump-mir-dataflow=val -- in addition to `.mir` files, create graphviz `.dot` files with dataflow results (default: no)
-Z dump-mir-dir=val -- the directory the MIR is dumped into (default: `mir_dump`)
-Z dump-mir-exclude-pass-number=val -- exclude the pass number when dumping MIR (used in tests) (default: no)
-Z dump-mir-graphviz=val -- in addition to `.mir` files, create graphviz `.dot` files (and with `-Z instrument-coverage`, also create a `.dot` file for the MIR-derived coverage graph) (default: no)
-Z dump-mir-spanview=val -- in addition to `.mir` files, create `.html` files to view spans for all `statement`s (including terminators), only `terminator` spans, or computed `block` spans (one span encompassing a block's terminator and all statements). If `-Z instrument-coverage` is also enabled, create an additional `.html` file showing the computed coverage spans.
-Z dump-mono-stats=val -- output statistics about monomorphization collection
-Z dump-mono-stats-format=val -- the format to use for -Z dump-mono-stats (`markdown` (default) or `json`)
-Z dwarf-version=val -- version of DWARF debug information to emit (default: 2 or 4, depending on platform)
-Z dylib-lto=val -- enables LTO for dylib crate type
-Z emit-stack-sizes=val -- emit a section containing stack size metadata (default: no)
-Z emit-thin-lto=val -- emit the bc module with thin LTO info (default: yes)
-Z export-executable-symbols=val -- export symbols from executables, as if they were dynamic libraries
-Z extra-const-ub-checks=val -- turns on more checks to detect const UB, which can be slow (default: no)
-Z fewer-names=val -- reduce memory use by retaining fewer names within compilation artifacts (LLVM-IR) (default: no)
-Z force-unstable-if-unmarked=val -- force all crates to be `rustc_private` unstable (default: no)
-Z fuel=val -- set the optimization fuel quota for a crate
-Z function-sections=val -- whether each function should go in its own section
-Z future-incompat-test=val -- forces all lints to be future incompatible, used for internal testing (default: no)
-Z gcc-ld=val -- implementation of ld used by cc
-Z graphviz-dark-mode=val -- use dark-themed colors in graphviz output (default: no)
-Z graphviz-font=val -- use the given `fontname` in graphviz output; can be overridden by setting environment variable `RUSTC_GRAPHVIZ_FONT` (default: `Courier, monospace`)
-Z hir-stats=val -- print some statistics about AST and HIR (default: no)
-Z human-readable-cgu-names=val -- generate human-readable, predictable names for codegen units (default: no)
-Z identify-regions=val -- display unnamed regions as `'<id>`, using a non-ident unique id (default: no)
-Z incremental-ignore-spans=val -- ignore spans during ICH computation -- used for testing (default: no)
-Z incremental-info=val -- print high-level information about incremental reuse (or the lack thereof) (default: no)
-Z incremental-relative-spans=val -- hash spans relative to their parent item for incr. comp. (default: no)
-Z incremental-verify-ich=val -- verify incr. comp. hashes of green query instances (default: no)
-Z inline-in-all-cgus=val -- control whether `#[inline]` functions are in all CGUs
-Z inline-llvm=val -- enable LLVM inlining (default: yes)
-Z inline-mir=val -- enable MIR inlining (default: no)
-Z inline-mir-hint-threshold=val -- inlining threshold for functions with inline hint (default: 100)
-Z inline-mir-threshold=val -- a default MIR inlining threshold (default: 50)
-Z input-stats=val -- gather statistics about the input (default: no)
-Z instrument-coverage=val -- instrument the generated code to support LLVM source-based code coverage reports (note, the compiler build config must include `profiler = true`); implies `-C symbol-mangling-version=v0`. Optional values are:
-Z dump-mir-dataflow=val -- in addition to `.mir` files, create graphviz `.dot` files with dataflow results (default: no)
-Z dump-mir-dir=val -- the directory the MIR is dumped into (default: `mir_dump`)
-Z dump-mir-exclude-pass-number=val -- exclude the pass number when dumping MIR (used in tests) (default: no)
-Z dump-mir-graphviz=val -- in addition to `.mir` files, create graphviz `.dot` files (and with `-Z instrument-coverage`, also create a `.dot` file for the MIR-derived coverage graph) (default: no)
-Z dump-mir-spanview=val -- in addition to `.mir` files, create `.html` files to view spans for all `statement`s (including terminators), only `terminator` spans, or computed `block` spans (one span encompassing a block's terminator and all statements). If `-Z instrument-coverage` is also enabled, create an additional `.html` file showing the computed coverage spans.
-Z dump-mono-stats=val -- output statistics about monomorphization collection
-Z dump-mono-stats-format=val -- the format to use for -Z dump-mono-stats (`markdown` (default) or `json`)
-Z dwarf-version=val -- version of DWARF debug information to emit (default: 2 or 4, depending on platform)
-Z dylib-lto=val -- enables LTO for dylib crate type
-Z emit-stack-sizes=val -- emit a section containing stack size metadata (default: no)
-Z emit-thin-lto=val -- emit the bc module with thin LTO info (default: yes)
-Z export-executable-symbols=val -- export symbols from executables, as if they were dynamic libraries
-Z extra-const-ub-checks=val -- turns on more checks to detect const UB, which can be slow (default: no)
-Z fewer-names=val -- reduce memory use by retaining fewer names within compilation artifacts (LLVM-IR) (default: no)
-Z force-unstable-if-unmarked=val -- force all crates to be `rustc_private` unstable (default: no)
-Z fuel=val -- set the optimization fuel quota for a crate
-Z function-sections=val -- whether each function should go in its own section
-Z future-incompat-test=val -- forces all lints to be future incompatible, used for internal testing (default: no)
-Z gcc-ld=val -- implementation of ld used by cc
-Z graphviz-dark-mode=val -- use dark-themed colors in graphviz output (default: no)
-Z graphviz-font=val -- use the given `fontname` in graphviz output; can be overridden by setting environment variable `RUSTC_GRAPHVIZ_FONT` (default: `Courier, monospace`)
-Z hir-stats=val -- print some statistics about AST and HIR (default: no)
-Z human-readable-cgu-names=val -- generate human-readable, predictable names for codegen units (default: no)
-Z identify-regions=val -- display unnamed regions as `'<id>`, using a non-ident unique id (default: no)
-Z incremental-ignore-spans=val -- ignore spans during ICH computation -- used for testing (default: no)
-Z incremental-info=val -- print high-level information about incremental reuse (or the lack thereof) (default: no)
-Z incremental-relative-spans=val -- hash spans relative to their parent item for incr. comp. (default: no)
-Z incremental-verify-ich=val -- verify incr. comp. hashes of green query instances (default: no)
-Z inline-in-all-cgus=val -- control whether `#[inline]` functions are in all CGUs
-Z inline-llvm=val -- enable LLVM inlining (default: yes)
-Z inline-mir=val -- enable MIR inlining (default: no)
-Z inline-mir-hint-threshold=val -- inlining threshold for functions with inline hint (default: 100)
-Z inline-mir-threshold=val -- a default MIR inlining threshold (default: 50)
-Z input-stats=val -- gather statistics about the input (default: no)
-Z instrument-coverage=val -- instrument the generated code to support LLVM source-based code coverage reports (note, the compiler build config must include `profiler = true`); implies `-C symbol-mangling-version=v0`. Optional values are:
`=all` (implicit value)
`=except-unused-generics`
`=except-unused-functions`
`=off` (default)
-Z instrument-mcount=val -- insert function instrument code for mcount-based tracing (default: no)
-Z instrument-xray=val -- insert function instrument code for XRay-based tracing (default: no)
-Z instrument-mcount=val -- insert function instrument code for mcount-based tracing (default: no)
-Z instrument-xray=val -- insert function instrument code for XRay-based tracing (default: no)
Optional extra settings:
`=always`
`=never`
@ -79,125 +79,124 @@
`=skip-entry`
`=skip-exit`
Multiple options can be combined with commas.
-Z keep-hygiene-data=val -- keep hygiene data after analysis (default: no)
-Z layout-seed=val -- seed layout randomization
-Z link-native-libraries=val -- link native libraries in the linker invocation (default: yes)
-Z link-only=val -- link the `.rlink` file generated by `-Z no-link` (default: no)
-Z llvm-plugins=val -- a list LLVM plugins to enable (space separated)
-Z llvm-time-trace=val -- generate JSON tracing data file from LLVM data (default: no)
-Z location-detail=val -- what location details should be tracked when using caller_location, either `none`, or a comma separated list of location details, for which valid options are `file`, `line`, and `column` (default: `file,line,column`)
-Z ls=val -- list the symbols defined by a library crate (default: no)
-Z macro-backtrace=val -- show macro backtraces (default: no)
-Z maximal-hir-to-mir-coverage=val -- save as much information as possible about the correspondence between MIR and HIR as source scopes (default: no)
-Z merge-functions=val -- control the operation of the MergeFunctions LLVM pass, taking the same values as the target option of the same name
-Z meta-stats=val -- gather metadata statistics (default: no)
-Z mir-emit-retag=val -- emit Retagging MIR statements, interpreted e.g., by miri; implies -Zmir-opt-level=0 (default: no)
-Z mir-enable-passes=val -- use like `-Zmir-enable-passes=+DestProp,-InstCombine`. Forces the specified passes to be enabled, overriding all other checks. Passes that are not specified are enabled or disabled by other flags as usual.
-Z mir-opt-level=val -- MIR optimization level (0-4; default: 1 in non optimized builds and 2 in optimized builds)
-Z mir-pretty-relative-line-numbers=val -- use line numbers relative to the function in mir pretty printing
-Z move-size-limit=val -- the size at which the `large_assignments` lint starts to be emitted
-Z mutable-noalias=val -- emit noalias metadata for mutable references (default: yes)
-Z nll-facts=val -- dump facts from NLL analysis into side files (default: no)
-Z nll-facts-dir=val -- the directory the NLL facts are dumped into (default: `nll-facts`)
-Z no-analysis=val -- parse and expand the source, but run no analysis
-Z no-codegen=val -- run all passes except codegen; no output
-Z no-generate-arange-section=val -- omit DWARF address ranges that give faster lookups
-Z no-jump-tables=val -- disable the jump tables and lookup tables that can be generated from a switch case lowering
-Z no-leak-check=val -- disable the 'leak check' for subtyping; unsound, but useful for tests
-Z no-link=val -- compile without linking
-Z no-parallel-llvm=val -- run LLVM in non-parallel mode (while keeping codegen-units and ThinLTO)
-Z no-profiler-runtime=val -- prevent automatic injection of the profiler_builtins crate
-Z no-unique-section-names=val -- do not use unique names for text and data sections when -Z function-sections is used
-Z normalize-docs=val -- normalize associated items in rustdoc when generating documentation
-Z oom=val -- panic strategy for out-of-memory handling
-Z osx-rpath-install-name=val -- pass `-install_name @rpath/...` to the macOS linker (default: no)
-Z packed-bundled-libs=val -- change rlib format to store native libraries as archives
-Z panic-abort-tests=val -- support compiling tests with panic=abort (default: no)
-Z panic-in-drop=val -- panic strategy for panics in drops
-Z parse-only=val -- parse only; do not compile, assemble, or link (default: no)
-Z perf-stats=val -- print some performance-related statistics (default: no)
-Z pick-stable-methods-before-any-unstable=val -- try to pick stable methods first before picking any unstable methods (default: yes)
-Z plt=val -- whether to use the PLT when calling into shared libraries;
-Z keep-hygiene-data=val -- keep hygiene data after analysis (default: no)
-Z layout-seed=val -- seed layout randomization
-Z link-native-libraries=val -- link native libraries in the linker invocation (default: yes)
-Z link-only=val -- link the `.rlink` file generated by `-Z no-link` (default: no)
-Z llvm-plugins=val -- a list LLVM plugins to enable (space separated)
-Z llvm-time-trace=val -- generate JSON tracing data file from LLVM data (default: no)
-Z location-detail=val -- what location details should be tracked when using caller_location, either `none`, or a comma separated list of location details, for which valid options are `file`, `line`, and `column` (default: `file,line,column`)
-Z ls=val -- list the symbols defined by a library crate (default: no)
-Z macro-backtrace=val -- show macro backtraces (default: no)
-Z maximal-hir-to-mir-coverage=val -- save as much information as possible about the correspondence between MIR and HIR as source scopes (default: no)
-Z merge-functions=val -- control the operation of the MergeFunctions LLVM pass, taking the same values as the target option of the same name
-Z meta-stats=val -- gather metadata statistics (default: no)
-Z mir-emit-retag=val -- emit Retagging MIR statements, interpreted e.g., by miri; implies -Zmir-opt-level=0 (default: no)
-Z mir-enable-passes=val -- use like `-Zmir-enable-passes=+DestProp,-InstCombine`. Forces the specified passes to be enabled, overriding all other checks. Passes that are not specified are enabled or disabled by other flags as usual.
-Z mir-opt-level=val -- MIR optimization level (0-4; default: 1 in non optimized builds and 2 in optimized builds)
-Z mir-pretty-relative-line-numbers=val -- use line numbers relative to the function in mir pretty printing
-Z move-size-limit=val -- the size at which the `large_assignments` lint starts to be emitted
-Z mutable-noalias=val -- emit noalias metadata for mutable references (default: yes)
-Z nll-facts=val -- dump facts from NLL analysis into side files (default: no)
-Z nll-facts-dir=val -- the directory the NLL facts are dumped into (default: `nll-facts`)
-Z no-analysis=val -- parse and expand the source, but run no analysis
-Z no-codegen=val -- run all passes except codegen; no output
-Z no-generate-arange-section=val -- omit DWARF address ranges that give faster lookups
-Z no-jump-tables=val -- disable the jump tables and lookup tables that can be generated from a switch case lowering
-Z no-leak-check=val -- disable the 'leak check' for subtyping; unsound, but useful for tests
-Z no-link=val -- compile without linking
-Z no-parallel-llvm=val -- run LLVM in non-parallel mode (while keeping codegen-units and ThinLTO)
-Z no-profiler-runtime=val -- prevent automatic injection of the profiler_builtins crate
-Z no-unique-section-names=val -- do not use unique names for text and data sections when -Z function-sections is used
-Z normalize-docs=val -- normalize associated items in rustdoc when generating documentation
-Z oom=val -- panic strategy for out-of-memory handling
-Z osx-rpath-install-name=val -- pass `-install_name @rpath/...` to the macOS linker (default: no)
-Z packed-bundled-libs=val -- change rlib format to store native libraries as archives
-Z panic-abort-tests=val -- support compiling tests with panic=abort (default: no)
-Z panic-in-drop=val -- panic strategy for panics in drops
-Z parse-only=val -- parse only; do not compile, assemble, or link (default: no)
-Z perf-stats=val -- print some performance-related statistics (default: no)
-Z plt=val -- whether to use the PLT when calling into shared libraries;
only has effect for PIC code on systems with ELF binaries
(default: PLT is disabled if full relro is enabled)
-Z polonius=val -- enable polonius-based borrow-checker (default: no)
-Z polymorphize=val -- perform polymorphization analysis
-Z pre-link-arg=val -- a single extra argument to prepend the linker invocation (can be used several times)
-Z pre-link-args=val -- extra arguments to prepend to the linker invocation (space separated)
-Z precise-enum-drop-elaboration=val -- use a more precise version of drop elaboration for matches on enums (default: yes). This results in better codegen, but has caused miscompilations on some tier 2 platforms. See #77382 and #74551.
-Z print-fuel=val -- make rustc print the total optimization fuel used by a crate
-Z print-llvm-passes=val -- print the LLVM optimization passes being run (default: no)
-Z print-mono-items=val -- print the result of the monomorphization collection pass
-Z print-type-sizes=val -- print layout information for each type encountered (default: no)
-Z proc-macro-backtrace=val -- show backtraces for panics during proc-macro execution (default: no)
-Z proc-macro-execution-strategy=val -- how to run proc-macro code (default: same-thread)
-Z profile=val -- insert profiling code (default: no)
-Z profile-closures=val -- profile size of closures
-Z profile-emit=val -- file path to emit profiling data at runtime when using 'profile' (default based on relative source path)
-Z profile-sample-use=val -- use the given `.prof` file for sampled profile-guided optimization (also known as AutoFDO)
-Z profiler-runtime=val -- name of the profiler runtime crate to automatically inject (default: `profiler_builtins`)
-Z query-dep-graph=val -- enable queries of the dependency graph for regression testing (default: no)
-Z randomize-layout=val -- randomize the layout of types (default: no)
-Z relax-elf-relocations=val -- whether ELF relocations can be relaxed
-Z relro-level=val -- choose which RELRO level to use
-Z remap-cwd-prefix=val -- remap paths under the current working directory to this path prefix
-Z report-delayed-bugs=val -- immediately print bugs registered with `delay_span_bug` (default: no)
-Z sanitizer=val -- use a sanitizer
-Z sanitizer-memory-track-origins=val -- enable origins tracking in MemorySanitizer
-Z sanitizer-recover=val -- enable recovery for selected sanitizers
-Z saturating-float-casts=val -- make float->int casts UB-free: numbers outside the integer type's range are clipped to the max/min integer respectively, and NaN is mapped to 0 (default: yes)
-Z self-profile=val -- run the self profiler and output the raw event data
-Z self-profile-counter=val -- counter used by the self profiler (default: `wall-time`), one of:
-Z polonius=val -- enable polonius-based borrow-checker (default: no)
-Z polymorphize=val -- perform polymorphization analysis
-Z pre-link-arg=val -- a single extra argument to prepend the linker invocation (can be used several times)
-Z pre-link-args=val -- extra arguments to prepend to the linker invocation (space separated)
-Z precise-enum-drop-elaboration=val -- use a more precise version of drop elaboration for matches on enums (default: yes). This results in better codegen, but has caused miscompilations on some tier 2 platforms. See #77382 and #74551.
-Z print-fuel=val -- make rustc print the total optimization fuel used by a crate
-Z print-llvm-passes=val -- print the LLVM optimization passes being run (default: no)
-Z print-mono-items=val -- print the result of the monomorphization collection pass
-Z print-type-sizes=val -- print layout information for each type encountered (default: no)
-Z proc-macro-backtrace=val -- show backtraces for panics during proc-macro execution (default: no)
-Z proc-macro-execution-strategy=val -- how to run proc-macro code (default: same-thread)
-Z profile=val -- insert profiling code (default: no)
-Z profile-closures=val -- profile size of closures
-Z profile-emit=val -- file path to emit profiling data at runtime when using 'profile' (default based on relative source path)
-Z profile-sample-use=val -- use the given `.prof` file for sampled profile-guided optimization (also known as AutoFDO)
-Z profiler-runtime=val -- name of the profiler runtime crate to automatically inject (default: `profiler_builtins`)
-Z query-dep-graph=val -- enable queries of the dependency graph for regression testing (default: no)
-Z randomize-layout=val -- randomize the layout of types (default: no)
-Z relax-elf-relocations=val -- whether ELF relocations can be relaxed
-Z relro-level=val -- choose which RELRO level to use
-Z remap-cwd-prefix=val -- remap paths under the current working directory to this path prefix
-Z report-delayed-bugs=val -- immediately print bugs registered with `delay_span_bug` (default: no)
-Z sanitizer=val -- use a sanitizer
-Z sanitizer-memory-track-origins=val -- enable origins tracking in MemorySanitizer
-Z sanitizer-recover=val -- enable recovery for selected sanitizers
-Z saturating-float-casts=val -- make float->int casts UB-free: numbers outside the integer type's range are clipped to the max/min integer respectively, and NaN is mapped to 0 (default: yes)
-Z self-profile=val -- run the self profiler and output the raw event data
-Z self-profile-counter=val -- counter used by the self profiler (default: `wall-time`), one of:
`wall-time` (monotonic clock, i.e. `std::time::Instant`)
`instructions:u` (retired instructions, userspace-only)
`instructions-minus-irqs:u` (subtracting hardware interrupt counts for extra accuracy)
-Z self-profile-events=val -- specify the events recorded by the self profiler;
-Z self-profile-events=val -- specify the events recorded by the self profiler;
for example: `-Z self-profile-events=default,query-keys`
all options: none, all, default, generic-activity, query-provider, query-cache-hit
query-blocked, incr-cache-load, incr-result-hashing, query-keys, function-args, args, llvm, artifact-sizes
-Z share-generics=val -- make the current crate share its generic instantiations
-Z show-span=val -- show spans for compiler debugging (expr|pat|ty)
-Z simulate-remapped-rust-src-base=val -- simulate the effect of remap-debuginfo = true at bootstrapping by remapping path to rust's source base directory. only meant for testing purposes
-Z span-debug=val -- forward proc_macro::Span's `Debug` impl to `Span`
-Z span-free-formats=val -- exclude spans when debug-printing compiler state (default: no)
-Z split-dwarf-inlining=val -- provide minimal debug info in the object/executable to facilitate online symbolication/stack traces in the absence of .dwo/.dwp files when using Split DWARF
-Z split-dwarf-kind=val -- split dwarf variant (only if -Csplit-debuginfo is enabled and on relevant platform)
-Z share-generics=val -- make the current crate share its generic instantiations
-Z show-span=val -- show spans for compiler debugging (expr|pat|ty)
-Z simulate-remapped-rust-src-base=val -- simulate the effect of remap-debuginfo = true at bootstrapping by remapping path to rust's source base directory. only meant for testing purposes
-Z span-debug=val -- forward proc_macro::Span's `Debug` impl to `Span`
-Z span-free-formats=val -- exclude spans when debug-printing compiler state (default: no)
-Z split-dwarf-inlining=val -- provide minimal debug info in the object/executable to facilitate online symbolication/stack traces in the absence of .dwo/.dwp files when using Split DWARF
-Z split-dwarf-kind=val -- split dwarf variant (only if -Csplit-debuginfo is enabled and on relevant platform)
(default: `split`)
`split`: sections which do not require relocation are written into a DWARF object (`.dwo`)
file which is ignored by the linker
`single`: sections which do not require relocation are written into object file but ignored
by the linker
-Z src-hash-algorithm=val -- hash algorithm of source files in debug info (`md5`, `sha1`, or `sha256`)
-Z stack-protector=val -- control stack smash protection strategy (`rustc --print stack-protector-strategies` for details)
-Z strict-init-checks=val -- control if mem::uninitialized and mem::zeroed panic on more UB
-Z strip=val -- tell the linker which information to strip (`none` (default), `debuginfo` or `symbols`)
-Z symbol-mangling-version=val -- which mangling version to use for symbol names ('legacy' (default) or 'v0')
-Z teach=val -- show extended diagnostic help (default: no)
-Z temps-dir=val -- the directory the intermediate files are written to
-Z terminal-urls=val -- use the OSC 8 hyperlink terminal specification to print hyperlinks in the compiler output
-Z thinlto=val -- enable ThinLTO when possible
-Z thir-unsafeck=val -- use the THIR unsafety checker (default: no)
-Z threads=val -- use a thread pool with N threads
-Z time-llvm-passes=val -- measure time of each LLVM pass (default: no)
-Z time-passes=val -- measure time of each rustc pass (default: no)
-Z tiny-const-eval-limit=val -- sets a tiny, non-configurable limit for const eval; useful for compiler tests
-Z tls-model=val -- choose the TLS model to use (`rustc --print tls-models` for details)
-Z trace-macros=val -- for every macro invocation, print its name and arguments (default: no)
-Z track-diagnostics=val -- tracks where in rustc a diagnostic was emitted
-Z trait-solver=val -- specify the trait solver mode used by rustc (default: classic)
-Z translate-additional-ftl=val -- additional fluent translation to preferentially use (for testing translation)
-Z translate-directionality-markers=val -- emit directionality isolation markers in translated diagnostics
-Z translate-lang=val -- language identifier for diagnostic output
-Z translate-remapped-path-to-local-path=val -- translate remapped paths into local paths when possible (default: yes)
-Z trap-unreachable=val -- generate trap instructions for unreachable intrinsics (default: use target setting, usually yes)
-Z treat-err-as-bug=val -- treat error number `val` that occurs as bug
-Z trim-diagnostic-paths=val -- in diagnostics, use heuristics to shorten paths referring to items
-Z tune-cpu=val -- select processor to schedule for (`rustc --print target-cpus` for details)
-Z ui-testing=val -- emit compiler diagnostics in a form suitable for UI testing (default: no)
-Z uninit-const-chunk-threshold=val -- allow generating const initializers with mixed init/uninit chunks, and set the maximum number of chunks for which this is allowed (default: 16)
-Z unleash-the-miri-inside-of-you=val -- take the brakes off const evaluation. NOTE: this is unsound (default: no)
-Z unpretty=val -- present the input source, unstable (and less-pretty) variants;
-Z src-hash-algorithm=val -- hash algorithm of source files in debug info (`md5`, `sha1`, or `sha256`)
-Z stack-protector=val -- control stack smash protection strategy (`rustc --print stack-protector-strategies` for details)
-Z strict-init-checks=val -- control if mem::uninitialized and mem::zeroed panic on more UB
-Z strip=val -- tell the linker which information to strip (`none` (default), `debuginfo` or `symbols`)
-Z symbol-mangling-version=val -- which mangling version to use for symbol names ('legacy' (default) or 'v0')
-Z teach=val -- show extended diagnostic help (default: no)
-Z temps-dir=val -- the directory the intermediate files are written to
-Z terminal-urls=val -- use the OSC 8 hyperlink terminal specification to print hyperlinks in the compiler output
-Z thinlto=val -- enable ThinLTO when possible
-Z thir-unsafeck=val -- use the THIR unsafety checker (default: no)
-Z threads=val -- use a thread pool with N threads
-Z time-llvm-passes=val -- measure time of each LLVM pass (default: no)
-Z time-passes=val -- measure time of each rustc pass (default: no)
-Z tiny-const-eval-limit=val -- sets a tiny, non-configurable limit for const eval; useful for compiler tests
-Z tls-model=val -- choose the TLS model to use (`rustc --print tls-models` for details)
-Z trace-macros=val -- for every macro invocation, print its name and arguments (default: no)
-Z track-diagnostics=val -- tracks where in rustc a diagnostic was emitted
-Z trait-solver=val -- specify the trait solver mode used by rustc (default: classic)
-Z translate-additional-ftl=val -- additional fluent translation to preferentially use (for testing translation)
-Z translate-directionality-markers=val -- emit directionality isolation markers in translated diagnostics
-Z translate-lang=val -- language identifier for diagnostic output
-Z translate-remapped-path-to-local-path=val -- translate remapped paths into local paths when possible (default: yes)
-Z trap-unreachable=val -- generate trap instructions for unreachable intrinsics (default: use target setting, usually yes)
-Z treat-err-as-bug=val -- treat error number `val` that occurs as bug
-Z trim-diagnostic-paths=val -- in diagnostics, use heuristics to shorten paths referring to items
-Z tune-cpu=val -- select processor to schedule for (`rustc --print target-cpus` for details)
-Z ui-testing=val -- emit compiler diagnostics in a form suitable for UI testing (default: no)
-Z uninit-const-chunk-threshold=val -- allow generating const initializers with mixed init/uninit chunks, and set the maximum number of chunks for which this is allowed (default: 16)
-Z unleash-the-miri-inside-of-you=val -- take the brakes off const evaluation. NOTE: this is unsound (default: no)
-Z unpretty=val -- present the input source, unstable (and less-pretty) variants;
`normal`, `identified`,
`expanded`, `expanded,identified`,
`expanded,hygiene` (with internal representations),
@ -207,11 +206,11 @@
`hir,typed` (HIR with types for each node),
`hir-tree` (dump the raw HIR),
`mir` (the MIR), or `mir-cfg` (graphviz formatted MIR)
-Z unsound-mir-opts=val -- enable unsound and buggy MIR optimizations (default: no)
-Z unstable-options=val -- adds unstable command line options to rustc interface (default: no)
-Z use-ctors-section=val -- use legacy .ctors section for initializers rather than .init_array
-Z validate-mir=val -- validate MIR after each transformation
-Z verbose=val -- in general, enable more debug printouts (default: no)
-Z verify-llvm-ir=val -- verify LLVM IR (default: no)
-Z virtual-function-elimination=val -- enables dead virtual function elimination optimization. Requires `-Clto[=[fat,yes]]`
-Z wasi-exec-model=val -- whether to build a wasi command or reactor
-Z unsound-mir-opts=val -- enable unsound and buggy MIR optimizations (default: no)
-Z unstable-options=val -- adds unstable command line options to rustc interface (default: no)
-Z use-ctors-section=val -- use legacy .ctors section for initializers rather than .init_array
-Z validate-mir=val -- validate MIR after each transformation
-Z verbose=val -- in general, enable more debug printouts (default: no)
-Z verify-llvm-ir=val -- verify LLVM IR (default: no)
-Z virtual-function-elimination=val -- enables dead virtual function elimination optimization. Requires `-Clto[=[fat,yes]]`
-Z wasi-exec-model=val -- whether to build a wasi command or reactor

10
tests/ui/consts/const-eval/validate_uninhabited_zsts.32bit.stderr
View File

@ -2,10 +2,7 @@ warning: the type `!` does not permit zero-initialization
--> $DIR/validate_uninhabited_zsts.rs:4:14
|
LL | unsafe { std::mem::transmute(()) }
| ^^^^^^^^^^^^^^^^^^^^^^^
| |
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
| ^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed
|
= note: the `!` type has no valid value
= note: `#[warn(invalid_value)]` on by default
@ -40,10 +37,7 @@ warning: the type `empty::Empty` does not permit zero-initialization
--> $DIR/validate_uninhabited_zsts.rs:21:42
|
LL | const BAR: [empty::Empty; 3] = [unsafe { std::mem::transmute(()) }; 3];
| ^^^^^^^^^^^^^^^^^^^^^^^
| |
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
| ^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed
|
note: in this struct field
--> $DIR/validate_uninhabited_zsts.rs:16:22

10
tests/ui/consts/const-eval/validate_uninhabited_zsts.64bit.stderr
View File

@ -2,10 +2,7 @@ warning: the type `!` does not permit zero-initialization
--> $DIR/validate_uninhabited_zsts.rs:4:14
|
LL | unsafe { std::mem::transmute(()) }
| ^^^^^^^^^^^^^^^^^^^^^^^
| |
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
| ^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed
|
= note: the `!` type has no valid value
= note: `#[warn(invalid_value)]` on by default
@ -40,10 +37,7 @@ warning: the type `empty::Empty` does not permit zero-initialization
--> $DIR/validate_uninhabited_zsts.rs:21:42
|
LL | const BAR: [empty::Empty; 3] = [unsafe { std::mem::transmute(()) }; 3];
| ^^^^^^^^^^^^^^^^^^^^^^^
| |
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
| ^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed
|
note: in this struct field
--> $DIR/validate_uninhabited_zsts.rs:16:22

17
tests/ui/impl-trait/in-trait/default-method-constraint.rs Normal file
View File

@ -0,0 +1,17 @@
// check-pass
// This didn't work in the previous default RPITIT method hack attempt
#![feature(return_position_impl_trait_in_trait)]
//~^ WARN the feature `return_position_impl_trait_in_trait` is incomplete
trait Foo {
fn bar(x: bool) -> impl Sized {
if x {
let _: u32 = Self::bar(!x);
}
Default::default()
}
}
fn main() {}

11
tests/ui/impl-trait/in-trait/default-method-constraint.stderr Normal file
View File

@ -0,0 +1,11 @@
warning: the feature `return_position_impl_trait_in_trait` is incomplete and may not be safe to use and/or cause compiler crashes
--> $DIR/default-method-constraint.rs:5:12
|
LL | #![feature(return_position_impl_trait_in_trait)]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
= note: `#[warn(incomplete_features)]` on by default
warning: 1 warning emitted

40
tests/ui/lint/invalid_value.stderr
View File

@ -61,10 +61,7 @@ error: the type `!` does not permit zero-initialization
--> $DIR/invalid_value.rs:65:23
|
LL | let _val: ! = mem::zeroed();
| ^^^^^^^^^^^^^
| |
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
| ^^^^^^^^^^^^^ this code causes undefined behavior when executed
|
= note: the `!` type has no valid value
@ -72,10 +69,7 @@ error: the type `!` does not permit being left uninitialized
--> $DIR/invalid_value.rs:66:23
|
LL | let _val: ! = mem::uninitialized();
| ^^^^^^^^^^^^^^^^^^^^
| |
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
| ^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed
|
= note: the `!` type has no valid value
@ -83,10 +77,7 @@ error: the type `(i32, !)` does not permit zero-initialization
--> $DIR/invalid_value.rs:68:30
|
LL | let _val: (i32, !) = mem::zeroed();
| ^^^^^^^^^^^^^
| |
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
| ^^^^^^^^^^^^^ this code causes undefined behavior when executed
|
= note: the `!` type has no valid value
@ -94,10 +85,7 @@ error: the type `(i32, !)` does not permit being left uninitialized
--> $DIR/invalid_value.rs:69:30
|
LL | let _val: (i32, !) = mem::uninitialized();
| ^^^^^^^^^^^^^^^^^^^^
| |
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
| ^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed
|
= note: integers must be initialized
@ -105,10 +93,7 @@ error: the type `Void` does not permit zero-initialization
--> $DIR/invalid_value.rs:71:26
|
LL | let _val: Void = mem::zeroed();
| ^^^^^^^^^^^^^
| |
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
| ^^^^^^^^^^^^^ this code causes undefined behavior when executed
|
note: enums with no inhabited variants have no valid value
--> $DIR/invalid_value.rs:12:1
@ -120,10 +105,7 @@ error: the type `Void` does not permit being left uninitialized
--> $DIR/invalid_value.rs:72:26
|
LL | let _val: Void = mem::uninitialized();
| ^^^^^^^^^^^^^^^^^^^^
| |
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
| ^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed
|
note: enums with no inhabited variants have no valid value
--> $DIR/invalid_value.rs:12:1
@ -405,10 +387,7 @@ error: the type `TwoUninhabited` does not permit zero-initialization
--> $DIR/invalid_value.rs:104:36
|
LL | let _val: TwoUninhabited = mem::zeroed();
| ^^^^^^^^^^^^^
| |
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
| ^^^^^^^^^^^^^ this code causes undefined behavior when executed
|
note: enums with no inhabited variants have no valid value
--> $DIR/invalid_value.rs:42:1
@ -420,10 +399,7 @@ error: the type `TwoUninhabited` does not permit being left uninitialized
--> $DIR/invalid_value.rs:105:36
|
LL | let _val: TwoUninhabited = mem::uninitialized();
| ^^^^^^^^^^^^^^^^^^^^
| |
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
| ^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed
|
note: enums with no inhabited variants have no valid value
--> $DIR/invalid_value.rs:42:1

5
tests/ui/object-safety/object-safety-supertrait-mentions-GAT.stderr
View File

@ -1,5 +1,10 @@
error[E0311]: the parameter type `Self` may not live long enough
|
note: the parameter type `Self` must be valid for the lifetime `'a` as defined here...
--> $DIR/object-safety-supertrait-mentions-GAT.rs:9:26
|
LL | trait SuperTrait<T>: for<'a> GatTrait<Gat<'a> = T> {
| ^^
= help: consider adding an explicit lifetime bound `Self: 'a`...
= note: ...so that the type `Self` will meet its required lifetime bounds...
note: ...that is required by this bound

10
tests/ui/statics/uninhabited-static.stderr
View File

@ -53,10 +53,7 @@ warning: the type `Void` does not permit zero-initialization
--> $DIR/uninhabited-static.rs:12:31
|
LL | static VOID2: Void = unsafe { std::mem::transmute(()) };
| ^^^^^^^^^^^^^^^^^^^^^^^
| |
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
| ^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed
|
note: enums with no inhabited variants have no valid value
--> $DIR/uninhabited-static.rs:4:1
@ -75,10 +72,7 @@ warning: the type `Void` does not permit zero-initialization
--> $DIR/uninhabited-static.rs:16:32
|
LL | static NEVER2: Void = unsafe { std::mem::transmute(()) };
| ^^^^^^^^^^^^^^^^^^^^^^^
| |
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
| ^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed
|
note: enums with no inhabited variants have no valid value
--> $DIR/uninhabited-static.rs:4:1