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Rollup merge of #123411 - saethlin:ub-checks, r=Urgau,RalfJung

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Put checks that detect UB under their own flag below debug_assertions

Implementation of https://github.com/rust-lang/compiler-team/issues/725
This commit is contained in:
Matthias Krüger 2024-04-07 00:51:25 +02:00 committed by GitHub
commit 84dca1503e
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GPG Key ID: B5690EEEBB952194
42 changed files with 206 additions and 64 deletions
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2
compiler/rustc_codegen_cranelift/src/base.rs
View File

@ -789,7 +789,7 @@ fn is_fat_ptr<'tcx>(fx: &FunctionCx<'_, '_, 'tcx>, ty: Ty<'tcx>) -> bool {
layout.offset_of_subfield(fx, fields.iter()).bytes()
}
NullOp::UbChecks => {
let val = fx.tcx.sess.opts.debug_assertions;
let val = fx.tcx.sess.ub_checks();
let val = CValue::by_val(
fx.bcx.ins().iconst(types::I8, i64::try_from(val).unwrap()),
fx.layout_of(fx.tcx.types.bool),

2
compiler/rustc_codegen_ssa/src/mir/rvalue.rs
View File

@ -682,7 +682,7 @@ pub fn codegen_rvalue_operand(
bx.cx().const_usize(val)
}
mir::NullOp::UbChecks => {
let val = bx.tcx().sess.opts.debug_assertions;
let val = bx.tcx().sess.ub_checks();
bx.cx().const_bool(val)
}
};

2
compiler/rustc_const_eval/src/interpret/step.rs
View File

@ -258,7 +258,7 @@ pub fn eval_rvalue_into_place(
let val = layout.offset_of_subfield(self, fields.iter()).bytes();
Scalar::from_target_usize(val, self)
}
mir::NullOp::UbChecks => Scalar::from_bool(self.tcx.sess.opts.debug_assertions),
mir::NullOp::UbChecks => Scalar::from_bool(self.tcx.sess.ub_checks()),
};
self.write_scalar(val, &dest)?;
}

1
compiler/rustc_feature/src/builtin_attrs.rs
View File

@ -25,6 +25,7 @@ macro_rules! cfg_fn {
const GATED_CFGS: &[GatedCfg] = &[
// (name in cfg, feature, function to check if the feature is enabled)
(sym::overflow_checks, sym::cfg_overflow_checks, cfg_fn!(cfg_overflow_checks)),
(sym::ub_checks, sym::cfg_ub_checks, cfg_fn!(cfg_ub_checks)),
(sym::target_thread_local, sym::cfg_target_thread_local, cfg_fn!(cfg_target_thread_local)),
(
sym::target_has_atomic_equal_alignment,

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

@ -381,6 +381,8 @@ pub fn internal(&self, feature: Symbol) -> bool {
(unstable, cfg_target_has_atomic_equal_alignment, "1.60.0", Some(93822)),
/// Allows `cfg(target_thread_local)`.
(unstable, cfg_target_thread_local, "1.7.0", Some(29594)),
/// Allows the use of `#[cfg(ub_checks)` to check if UB checks are enabled.
(unstable, cfg_ub_checks, "CURRENT_RUSTC_VERSION", Some(123499)),
/// Allow conditional compilation depending on rust version
(unstable, cfg_version, "1.45.0", Some(64796)),
/// Allows to use the `#[cfi_encoding = ""]` attribute.

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

@ -846,6 +846,7 @@ macro_rules! tracked {
tracked!(trap_unreachable, Some(false));
tracked!(treat_err_as_bug, NonZero::new(1));
tracked!(tune_cpu, Some(String::from("abc")));
tracked!(ub_checks, Some(false));
tracked!(uninit_const_chunk_threshold, 123);
tracked!(unleash_the_miri_inside_of_you, true);
tracked!(use_ctors_section, Some(true));

8
compiler/rustc_middle/src/mir/mod.rs
View File

@ -777,8 +777,8 @@ fn try_const_mono_switchint<'a>(
// _1 = const _
// SwitchInt(_1)
//
// And MIR for if intrinsics::debug_assertions() looks like this:
// _1 = cfg!(debug_assertions)
// And MIR for if intrinsics::ub_checks() looks like this:
// _1 = UbChecks()
// SwitchInt(_1)
//
// So we're going to try to recognize this pattern.
@ -799,9 +799,7 @@ fn try_const_mono_switchint<'a>(
}
match rvalue {
Rvalue::NullaryOp(NullOp::UbChecks, _) => {
Some((tcx.sess.opts.debug_assertions as u128, targets))
}
Rvalue::NullaryOp(NullOp::UbChecks, _) => Some((tcx.sess.ub_checks() as u128, targets)),
Rvalue::Use(Operand::Constant(constant)) => {
let bits = eval_mono_const(constant);
Some((bits, targets))

2
compiler/rustc_mir_transform/src/check_alignment.rs
View File

@ -16,7 +16,7 @@ fn is_enabled(&self, sess: &Session) -> bool {
if sess.target.llvm_target == "i686-pc-windows-msvc" {
return false;
}
sess.opts.debug_assertions
sess.ub_checks()
}
fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {

2
compiler/rustc_mir_transform/src/instsimplify.rs
View File

@ -149,7 +149,7 @@ fn simplify_len(&self, source_info: &SourceInfo, rvalue: &mut Rvalue<'tcx>) {
fn simplify_ub_check(&self, source_info: &SourceInfo, rvalue: &mut Rvalue<'tcx>) {
if let Rvalue::NullaryOp(NullOp::UbChecks, _) = *rvalue {
let const_ = Const::from_bool(self.tcx, self.tcx.sess.opts.debug_assertions);
let const_ = Const::from_bool(self.tcx, self.tcx.sess.ub_checks());
let constant = ConstOperand { span: source_info.span, const_, user_ty: None };
*rvalue = Rvalue::Use(Operand::Constant(Box::new(constant)));
}

6
compiler/rustc_session/src/config/cfg.rs
View File

@ -212,6 +212,10 @@ macro_rules! ins_sym {
ins_none!(sym::test);
}
if sess.ub_checks() {
ins_none!(sym::ub_checks);
}
ret
}
@ -367,6 +371,8 @@ macro_rules! ins {
ins!(sym::test, no_values);
ins!(sym::ub_checks, no_values);
ins!(sym::unix, no_values);
ins!(sym::windows, no_values);
}

3
compiler/rustc_session/src/options.rs
View File

@ -1992,6 +1992,9 @@ pub(crate) fn parse_function_return(slot: &mut FunctionReturn, v: Option<&str>)
"in diagnostics, use heuristics to shorten paths referring to items"),
tune_cpu: Option<String> = (None, parse_opt_string, [TRACKED],
"select processor to schedule for (`rustc --print target-cpus` for details)"),
#[rustc_lint_opt_deny_field_access("use `Session::ub_checks` instead of this field")]
ub_checks: Option<bool> = (None, parse_opt_bool, [TRACKED],
"emit runtime checks for Undefined Behavior (default: -Cdebug-assertions)"),
ui_testing: bool = (false, parse_bool, [UNTRACKED],
"emit compiler diagnostics in a form suitable for UI testing (default: no)"),
uninit_const_chunk_threshold: usize = (16, parse_number, [TRACKED],

4
compiler/rustc_session/src/session.rs
View File

@ -735,6 +735,10 @@ pub fn overflow_checks(&self) -> bool {
self.opts.cg.overflow_checks.unwrap_or(self.opts.debug_assertions)
}
pub fn ub_checks(&self) -> bool {
self.opts.unstable_opts.ub_checks.unwrap_or(self.opts.debug_assertions)
}
pub fn relocation_model(&self) -> RelocModel {
self.opts.cg.relocation_model.unwrap_or(self.target.relocation_model)
}

1
compiler/rustc_span/src/symbol.rs
View File

@ -514,6 +514,7 @@
cfg_target_has_atomic_equal_alignment,
cfg_target_thread_local,
cfg_target_vendor,
cfg_ub_checks,
cfg_version,
cfi,
cfi_encoding,

2
compiler/stable_mir/src/mir/body.rs
View File

@ -993,7 +993,7 @@ pub enum NullOp {
AlignOf,
/// Returns the offset of a field.
OffsetOf(Vec<(VariantIdx, FieldIdx)>),
/// cfg!(debug_assertions), but at codegen time
/// cfg!(ub_checks), but at codegen time
UbChecks,
}

14
library/core/src/intrinsics.rs
View File

@ -2704,17 +2704,17 @@ pub const fn is_val_statically_known<T: Copy>(_arg: T) -> bool {
}
/// Returns whether we should perform some UB-checking at runtime. This eventually evaluates to
/// `cfg!(debug_assertions)`, but behaves different from `cfg!` when mixing crates built with different
/// flags: if the crate has debug assertions enabled or carries the `#[rustc_preserve_ub_checks]`
/// `cfg!(ub_checks)`, but behaves different from `cfg!` when mixing crates built with different
/// flags: if the crate has UB checks enabled or carries the `#[rustc_preserve_ub_checks]`
/// attribute, evaluation is delayed until monomorphization (or until the call gets inlined into
/// a crate that does not delay evaluation further); otherwise it can happen any time.
///
/// The common case here is a user program built with debug_assertions linked against the distributed
/// sysroot which is built without debug_assertions but with `#[rustc_preserve_ub_checks]`.
/// The common case here is a user program built with ub_checks linked against the distributed
/// sysroot which is built without ub_checks but with `#[rustc_preserve_ub_checks]`.
/// For code that gets monomorphized in the user crate (i.e., generic functions and functions with
/// `#[inline]`), gating assertions on `ub_checks()` rather than `cfg!(debug_assertions)` means that
/// assertions are enabled whenever the *user crate* has debug assertions enabled. However if the
/// user has debug assertions disabled, the checks will still get optimized out. This intrinsic is
/// `#[inline]`), gating assertions on `ub_checks()` rather than `cfg!(ub_checks)` means that
/// assertions are enabled whenever the *user crate* has UB checks enabled. However if the
/// user has UB checks disabled, the checks will still get optimized out. This intrinsic is
/// primarily used by [`ub_checks::assert_unsafe_precondition`].
#[rustc_const_unstable(feature = "const_ub_checks", issue = "none")]
#[unstable(feature = "core_intrinsics", issue = "none")]

3
src/doc/unstable-book/src/compiler-flags/check-cfg.md
View File

@ -77,7 +77,7 @@ Those well known names and values follows the same stability as what they refer
Well known names and values checking is always enabled as long as at least one
`--check-cfg` argument is present.
As of `2024-02-15T`, the list of known names is as follows:
As of `2024-04-06T`, the list of known names is as follows:
<!--- See CheckCfg::fill_well_known in compiler/rustc_session/src/config.rs -->
@ -107,6 +107,7 @@ As of `2024-02-15T`, the list of known names is as follows:
- `target_thread_local`
- `target_vendor`
- `test`
- `ub_checks`
- `unix`
- `windows`

17
src/doc/unstable-book/src/compiler-flags/ub-checks.md Normal file
View File

@ -0,0 +1,17 @@
# `ub-checks`
The tracking issue for this feature is: [#123499](https://github.com/rust-lang/rust/issues/123499).
--------------------
The `-Zub-checks` compiler flag enables additional runtime checks that detect some causes of Undefined Behavior at runtime.
By default, `-Zub-checks` flag inherits the value of `-Cdebug-assertions`.
All checks are generated on a best-effort basis; even if we have a check implemented for some cause of Undefined Behavior, it may be possible for the check to not fire.
If a dependency is compiled with `-Zub-checks=no` but the final binary or library is compiled with `-Zub-checks=yes`, UB checks reached by the dependency are likely to be optimized out.
When `-Zub-checks` detects UB, a non-unwinding panic is produced.
That means that we will not unwind the stack and will not call any `Drop` impls, but we will execute the configured panic hook.
We expect that unsafe code has been written which relies on code not unwinding which may have UB checks inserted.
Ergo, an unwinding panic could easily turn works-as-intended UB into a much bigger problem.
Calling the panic hook theoretically has the same implications, but we expect that the standard library panic hook will be stateless enough to be always called, and that if a user has configured a panic hook that the hook may be very helpful to debugging the detected UB.

28
tests/codegen/ub-checks.rs Normal file
View File

@ -0,0 +1,28 @@
// With -Zub-checks=yes (enabled by default by -Cdebug-assertions=yes) we will produce a runtime
// check that the index to slice::get_unchecked is in-bounds of the slice. That is tested for by
// tests/ui/precondition-checks/out-of-bounds-get-unchecked.rs
//
// This test ensures that such a runtime check is *not* emitted when debug-assertions are enabled,
// but ub-checks are explicitly disabled.
//@ revisions: DEBUG NOCHECKS
//@ [DEBUG] compile-flags:
//@ [NOCHECKS] compile-flags: -Zub-checks=no
//@ compile-flags: -O -Cdebug-assertions=yes
#![crate_type = "lib"]
use std::ops::Range;
// CHECK-LABEL: @slice_get_unchecked(
#[no_mangle]
pub unsafe fn slice_get_unchecked(x: &[i32], i: usize) -> &i32 {
// CHECK: icmp ult
// NOCHECKS: tail call void @llvm.assume
// DEBUG: br i1
// DEBUG: call core::panicking::panic_nounwind
// DEBUG: unreachable
// CHECK: getelementptr inbounds
// CHECK: ret ptr
x.get_unchecked(i)
}

2
tests/ui/check-cfg/allow-same-level.stderr
View File

@ -4,7 +4,7 @@ warning: unexpected `cfg` condition name: `FALSE`
LL | #[cfg(FALSE)]
| ^^^^^
|
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
= help: to expect this configuration use `--check-cfg=cfg(FALSE)`
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
= note: `#[warn(unexpected_cfgs)]` on by default

2
tests/ui/check-cfg/cargo-feature.none.stderr
View File

@ -25,7 +25,7 @@ warning: unexpected `cfg` condition name: `tokio_unstable`
LL | #[cfg(tokio_unstable)]
| ^^^^^^^^^^^^^^
|
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
= help: consider using a Cargo feature instead or adding `println!("cargo:rustc-check-cfg=cfg(tokio_unstable)");` to the top of a `build.rs`
= note: see <https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#check-cfg> for more information about checking conditional configuration

2
tests/ui/check-cfg/cargo-feature.some.stderr
View File

@ -25,7 +25,7 @@ warning: unexpected `cfg` condition name: `tokio_unstable`
LL | #[cfg(tokio_unstable)]
| ^^^^^^^^^^^^^^
|
= help: expected names are: `CONFIG_NVME`, `clippy`, `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
= help: expected names are: `CONFIG_NVME`, `clippy`, `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
= help: consider using a Cargo feature instead or adding `println!("cargo:rustc-check-cfg=cfg(tokio_unstable)");` to the top of a `build.rs`
= note: see <https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#check-cfg> for more information about checking conditional configuration

2
tests/ui/check-cfg/cfg-value-for-cfg-name-duplicate.stderr
View File

@ -4,7 +4,7 @@ warning: unexpected `cfg` condition name: `value`
LL | #[cfg(value)]
| ^^^^^
|
= help: expected names are: `bar`, `bee`, `clippy`, `cow`, `debug_assertions`, `doc`, `doctest`, `foo`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
= help: expected names are: `bar`, `bee`, `clippy`, `cow`, `debug_assertions`, `doc`, `doctest`, `foo`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
= help: to expect this configuration use `--check-cfg=cfg(value)`
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
= note: `#[warn(unexpected_cfgs)]` on by default

2
tests/ui/check-cfg/cfg-value-for-cfg-name-multiple.stderr
View File

@ -4,7 +4,7 @@ warning: unexpected `cfg` condition name: `my_value`
LL | #[cfg(my_value)]
| ^^^^^^^^
|
= help: expected names are: `bar`, `clippy`, `debug_assertions`, `doc`, `doctest`, `foo`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
= help: expected names are: `bar`, `clippy`, `debug_assertions`, `doc`, `doctest`, `foo`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
= help: to expect this configuration use `--check-cfg=cfg(my_value)`
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
= note: `#[warn(unexpected_cfgs)]` on by default

2
tests/ui/check-cfg/cfg-value-for-cfg-name.stderr
View File

@ -4,7 +4,7 @@ warning: unexpected `cfg` condition name: `linux`
LL | #[cfg(linux)]
| ^^^^^ help: found config with similar value: `target_os = "linux"`
|
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
= help: to expect this configuration use `--check-cfg=cfg(linux)`
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
= note: `#[warn(unexpected_cfgs)]` on by default

2
tests/ui/check-cfg/compact-names.stderr
View File

@ -4,7 +4,7 @@ warning: unexpected `cfg` condition name: `target_architecture`
LL | #[cfg(target(os = "linux", architecture = "arm"))]
| ^^^^^^^^^^^^^^^^^^^^
|
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
= help: to expect this configuration use `--check-cfg=cfg(target_architecture, values("arm"))`
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
= note: `#[warn(unexpected_cfgs)]` on by default

2
tests/ui/check-cfg/exhaustive-names-values.empty_cfg.stderr
View File

@ -4,7 +4,7 @@ warning: unexpected `cfg` condition name: `unknown_key`
LL | #[cfg(unknown_key = "value")]
| ^^^^^^^^^^^^^^^^^^^^^
|
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
= help: to expect this configuration use `--check-cfg=cfg(unknown_key, values("value"))`
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
= note: `#[warn(unexpected_cfgs)]` on by default

2
tests/ui/check-cfg/exhaustive-names-values.feature.stderr
View File

@ -4,7 +4,7 @@ warning: unexpected `cfg` condition name: `unknown_key`
LL | #[cfg(unknown_key = "value")]
| ^^^^^^^^^^^^^^^^^^^^^
|
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
= help: to expect this configuration use `--check-cfg=cfg(unknown_key, values("value"))`
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
= note: `#[warn(unexpected_cfgs)]` on by default

2
tests/ui/check-cfg/exhaustive-names-values.full.stderr
View File

@ -4,7 +4,7 @@ warning: unexpected `cfg` condition name: `unknown_key`
LL | #[cfg(unknown_key = "value")]
| ^^^^^^^^^^^^^^^^^^^^^
|
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
= help: to expect this configuration use `--check-cfg=cfg(unknown_key, values("value"))`
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
= note: `#[warn(unexpected_cfgs)]` on by default

2
tests/ui/check-cfg/exhaustive-names.stderr
View File

@ -4,7 +4,7 @@ warning: unexpected `cfg` condition name: `unknown_key`
LL | #[cfg(unknown_key = "value")]
| ^^^^^^^^^^^^^^^^^^^^^
|
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
= help: to expect this configuration use `--check-cfg=cfg(unknown_key, values("value"))`
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
= note: `#[warn(unexpected_cfgs)]` on by default

2
tests/ui/check-cfg/mix.stderr
View File

@ -44,7 +44,7 @@ warning: unexpected `cfg` condition name: `uu`
LL | #[cfg_attr(uu, test)]
| ^^
|
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
= help: to expect this configuration use `--check-cfg=cfg(uu)`
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration

2
tests/ui/check-cfg/stmt-no-ice.stderr
View File

@ -4,7 +4,7 @@ warning: unexpected `cfg` condition name: `crossbeam_loom`
LL | #[cfg(crossbeam_loom)]
| ^^^^^^^^^^^^^^
|
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
= help: to expect this configuration use `--check-cfg=cfg(crossbeam_loom)`
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
= note: `#[warn(unexpected_cfgs)]` on by default

2
tests/ui/check-cfg/well-known-names.stderr
View File

@ -18,7 +18,7 @@ warning: unexpected `cfg` condition name: `features`
LL | #[cfg(features = "foo")]
| ^^^^^^^^^^^^^^^^
|
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
= help: to expect this configuration use `--check-cfg=cfg(features, values("foo"))`
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration

3
tests/ui/check-cfg/well-known-values.rs
View File

@ -14,6 +14,7 @@
#![feature(cfg_target_has_atomic)]
#![feature(cfg_target_has_atomic_equal_alignment)]
#![feature(cfg_target_thread_local)]
#![feature(cfg_ub_checks)]
// This part makes sure that none of the well known names are
// unexpected.
@ -71,6 +72,8 @@
//~^ WARN unexpected `cfg` condition value
test = "_UNEXPECTED_VALUE",
//~^ WARN unexpected `cfg` condition value
ub_checks = "_UNEXPECTED_VALUE",
//~^ WARN unexpected `cfg` condition value
unix = "_UNEXPECTED_VALUE",
//~^ WARN unexpected `cfg` condition value
windows = "_UNEXPECTED_VALUE",

67
tests/ui/check-cfg/well-known-values.stderr
View File

@ -1,5 +1,5 @@
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:26:5
--> $DIR/well-known-values.rs:27:5
|
LL | clippy = "_UNEXPECTED_VALUE",
| ^^^^^^----------------------
@ -11,7 +11,7 @@ LL | clippy = "_UNEXPECTED_VALUE",
= note: `#[warn(unexpected_cfgs)]` on by default
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:28:5
--> $DIR/well-known-values.rs:29:5
|
LL | debug_assertions = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^----------------------
@ -22,7 +22,7 @@ LL | debug_assertions = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:30:5
--> $DIR/well-known-values.rs:31:5
|
LL | doc = "_UNEXPECTED_VALUE",
| ^^^----------------------
@ -33,7 +33,7 @@ LL | doc = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:32:5
--> $DIR/well-known-values.rs:33:5
|
LL | doctest = "_UNEXPECTED_VALUE",
| ^^^^^^^----------------------
@ -44,7 +44,7 @@ LL | doctest = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:34:5
--> $DIR/well-known-values.rs:35:5
|
LL | miri = "_UNEXPECTED_VALUE",
| ^^^^----------------------
@ -55,7 +55,7 @@ LL | miri = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:36:5
--> $DIR/well-known-values.rs:37:5
|
LL | overflow_checks = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^----------------------
@ -66,7 +66,7 @@ LL | overflow_checks = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:38:5
--> $DIR/well-known-values.rs:39:5
|
LL | panic = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -75,7 +75,7 @@ LL | panic = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:40:5
--> $DIR/well-known-values.rs:41:5
|
LL | proc_macro = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^----------------------
@ -86,7 +86,7 @@ LL | proc_macro = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:42:5
--> $DIR/well-known-values.rs:43:5
|
LL | relocation_model = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -95,7 +95,7 @@ LL | relocation_model = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:44:5
--> $DIR/well-known-values.rs:45:5
|
LL | sanitize = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -104,7 +104,7 @@ LL | sanitize = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:46:5
--> $DIR/well-known-values.rs:47:5
|
LL | target_abi = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -113,7 +113,7 @@ LL | target_abi = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:48:5
--> $DIR/well-known-values.rs:49:5
|
LL | target_arch = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -122,7 +122,7 @@ LL | target_arch = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:50:5
--> $DIR/well-known-values.rs:51:5
|
LL | target_endian = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -131,7 +131,7 @@ LL | target_endian = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:52:5
--> $DIR/well-known-values.rs:53:5
|
LL | target_env = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -140,7 +140,7 @@ LL | target_env = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:54:5
--> $DIR/well-known-values.rs:55:5
|
LL | target_family = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -149,7 +149,7 @@ LL | target_family = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:56:5
--> $DIR/well-known-values.rs:57:5
|
LL | target_feature = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -158,7 +158,7 @@ LL | target_feature = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:58:5
--> $DIR/well-known-values.rs:59:5
|
LL | target_has_atomic = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -167,7 +167,7 @@ LL | target_has_atomic = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:60:5
--> $DIR/well-known-values.rs:61:5
|
LL | target_has_atomic_equal_alignment = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -176,7 +176,7 @@ LL | target_has_atomic_equal_alignment = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:62:5
--> $DIR/well-known-values.rs:63:5
|
LL | target_has_atomic_load_store = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -185,7 +185,7 @@ LL | target_has_atomic_load_store = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:64:5
--> $DIR/well-known-values.rs:65:5
|
LL | target_os = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -194,7 +194,7 @@ LL | target_os = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:66:5
--> $DIR/well-known-values.rs:67:5
|
LL | target_pointer_width = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -203,7 +203,7 @@ LL | target_pointer_width = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:68:5
--> $DIR/well-known-values.rs:69:5
|
LL | target_thread_local = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^----------------------
@ -214,7 +214,7 @@ LL | target_thread_local = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:70:5
--> $DIR/well-known-values.rs:71:5
|
LL | target_vendor = "_UNEXPECTED_VALUE",
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -223,7 +223,7 @@ LL | target_vendor = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:72:5
--> $DIR/well-known-values.rs:73:5
|
LL | test = "_UNEXPECTED_VALUE",
| ^^^^----------------------
@ -234,7 +234,18 @@ LL | test = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:74:5
--> $DIR/well-known-values.rs:75:5
|
LL | ub_checks = "_UNEXPECTED_VALUE",
| ^^^^^^^^^----------------------
| |
| help: remove the value
|
= note: no expected value for `ub_checks`
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:77:5
|
LL | unix = "_UNEXPECTED_VALUE",
| ^^^^----------------------
@ -245,7 +256,7 @@ LL | unix = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
--> $DIR/well-known-values.rs:76:5
--> $DIR/well-known-values.rs:79:5
|
LL | windows = "_UNEXPECTED_VALUE",
| ^^^^^^^----------------------
@ -256,7 +267,7 @@ LL | windows = "_UNEXPECTED_VALUE",
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: unexpected `cfg` condition value: `linuz`
--> $DIR/well-known-values.rs:82:7
--> $DIR/well-known-values.rs:85:7
|
LL | #[cfg(target_os = "linuz")] // testing that we suggest `linux`
| ^^^^^^^^^^^^-------
@ -266,5 +277,5 @@ LL | #[cfg(target_os = "linuz")] // testing that we suggest `linux`
= note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `openbsd`, `psp`, `redox`, `solaris`, `solid_asp3`, `teeos`, `tvos`, `uefi`, `unknown`, `visionos`, `vita`, `vxworks`, `wasi`, `watchos`, `windows`, `xous`, `zkvm`
= note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
warning: 27 warnings emitted
warning: 28 warnings emitted

5
tests/ui/feature-gates/feature-gate-cfg_ub_checks.rs Normal file
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@ -0,0 +1,5 @@
#![crate_type = "lib"]
pub fn ub_checks_are_enabled() -> bool {
cfg!(ub_checks) //~ ERROR `cfg(ub_checks)` is experimental
}

13
tests/ui/feature-gates/feature-gate-cfg_ub_checks.stderr Normal file
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@ -0,0 +1,13 @@
error[E0658]: `cfg(ub_checks)` is experimental and subject to change
--> $DIR/feature-gate-cfg_ub_checks.rs:4:10
|
LL | cfg!(ub_checks)
| ^^^^^^^^^
|
= note: see issue #123499 <https://github.com/rust-lang/rust/issues/123499> for more information
= help: add `#![feature(cfg_ub_checks)]` 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`.

10
tests/ui/precondition-checks/cfg-ub-checks-default.rs Normal file
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@ -0,0 +1,10 @@
//@ run-pass
//@ revisions YES NO
//@ [YES] compile-flags: -Cdebug-assertions=yes
//@ [NO] compile-flags: -Cdebug-assertions=no
#![feature(cfg_ub_checks)]
fn main() {
assert_eq!(cfg!(ub_checks), cfg!(debug_assertions));
}

19
tests/ui/precondition-checks/cfg-ub-checks-no.rs Normal file
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@ -0,0 +1,19 @@
//@ run-pass
//@ compile-flags: -Zub-checks=no
#![feature(cfg_ub_checks)]
fn main() {
assert!(!cfg!(ub_checks));
assert!(compiles_differently());
}
#[cfg(ub_checks)]
fn compiles_differently() -> bool {
false
}
#[cfg(not(ub_checks))]
fn compiles_differently() -> bool {
true
}

19
tests/ui/precondition-checks/cfg-ub-checks-yes.rs Normal file
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@ -0,0 +1,19 @@
//@ run-pass
//@ compile-flags: -Zub-checks=yes
#![feature(cfg_ub_checks)]
fn main() {
assert!(cfg!(ub_checks));
assert!(compiles_differently());
}
#[cfg(ub_checks)]
fn compiles_differently() -> bool {
true
}
#[cfg(not(ub_checks))]
fn compiles_differently() -> bool {
false
}

2
tests/ui/precondition-checks/misaligned-slice.rs
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@ -1,5 +1,5 @@
//@ run-fail
//@ compile-flags: -Copt-level=3 -Cdebug-assertions=yes
//@ compile-flags: -Copt-level=3 -Cdebug-assertions=no -Zub-checks=yes
//@ error-pattern: unsafe precondition(s) violated: slice::from_raw_parts
//@ ignore-debug

2
tests/ui/precondition-checks/null-slice.rs
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@ -1,5 +1,5 @@
//@ run-fail
//@ compile-flags: -Copt-level=3 -Cdebug-assertions=yes
//@ compile-flags: -Copt-level=3 -Cdebug-assertions=no -Zub-checks=yes
//@ error-pattern: unsafe precondition(s) violated: slice::from_raw_parts
//@ ignore-debug

2
tests/ui/precondition-checks/out-of-bounds-get-unchecked.rs
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@ -1,5 +1,5 @@
//@ run-fail
//@ compile-flags: -Copt-level=3 -Cdebug-assertions=yes
//@ compile-flags: -Copt-level=3 -Cdebug-assertions=no -Zub-checks=yes
//@ error-pattern: slice::get_unchecked requires
//@ ignore-debug