Auto merge of rust-lang#125588 - workingjubilee:rollup-yr47gxo, r=workingjubilee

Rollup of 10 pull requests

Successful merges:

 - rust-lang#125046 (Only allow immutable statics with #[linkage])
 - rust-lang#125466 (Don't continue probing for method if in suggestion and autoderef hits ambiguity)
 - rust-lang#125469 (Don't skip out of inner const when looking for body for suggestion)
 - rust-lang#125530 (cleanup dependence of `ExtCtxt` in transcribe when macro expansion)
 - rust-lang#125535 (clean-up: remove deprecated field `dist.missing-tools`)
 - rust-lang#125539 (crashes: increment the number of tracked ones)
 - rust-lang#125544 (Also mention my-self for other check-cfg docs changes)
 - rust-lang#125559 (Simplify the `unchecked_sh[lr]` ub-checks a bit)
 - rust-lang#125566 (Notify T-rustdoc for beta-accepted and stable-accepted too)
 - rust-lang#125582 (Avoid a `FieldIdx::from_usize` in InstSimplify)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

compiler/rustc_codegen_ssa/src/codegen_attrs.rs

@@ -327,6 +327,18 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs {
                     } else {
                         codegen_fn_attrs.linkage = linkage;
                     }
+                    if tcx.is_mutable_static(did.into()) {
+                        let mut diag = tcx.dcx().struct_span_err(
+                            attr.span,
+                            "mutable statics are not allowed with `#[linkage]`",
+                        );
+                        diag.note(
+                            "making the static mutable would allow changing which symbol the \
+                             static references rather than make the target of the symbol \
+                             mutable",
+                        );
+                        diag.emit();
+                    }
                 }
             }
             sym::link_section => {

compiler/rustc_expand/src/mbe/macro_rules.rs

@@ -223,7 +223,8 @@ fn expand_macro<'cx>(
             let arm_span = rhses[i].span();
 
             // rhs has holes ( `$id` and `$(...)` that need filled)
-            let tts = match transcribe(cx, &named_matches, rhs, rhs_span, transparency) {
+            let id = cx.current_expansion.id;
+            let tts = match transcribe(psess, &named_matches, rhs, rhs_span, transparency, id) {
                 Ok(tts) => tts,
                 Err(err) => {
                     let guar = err.emit();

compiler/rustc_expand/src/mbe/transcribe.rs

@@ -1,4 +1,3 @@
-use crate::base::ExtCtxt;
 use crate::errors::{
     CountRepetitionMisplaced, MetaVarExprUnrecognizedVar, MetaVarsDifSeqMatchers, MustRepeatOnce,
     NoSyntaxVarsExprRepeat, VarStillRepeating,
@@ -9,12 +8,13 @@ use rustc_ast::mut_visit::{self, MutVisitor};
 use rustc_ast::token::{self, Delimiter, Token, TokenKind};
 use rustc_ast::tokenstream::{DelimSpacing, DelimSpan, Spacing, TokenStream, TokenTree};
 use rustc_data_structures::fx::FxHashMap;
-use rustc_errors::{pluralize, Diag, PResult};
+use rustc_errors::{pluralize, Diag, DiagCtxt, PResult};
 use rustc_parse::parser::ParseNtResult;
 use rustc_span::hygiene::{LocalExpnId, Transparency};
 use rustc_span::symbol::{sym, Ident, MacroRulesNormalizedIdent};
 use rustc_span::{with_metavar_spans, Span, SyntaxContext};
 
+use rustc_session::parse::ParseSess;
 use smallvec::{smallvec, SmallVec};
 use std::mem;
 
@@ -99,11 +99,12 @@ impl<'a> Iterator for Frame<'a> {
 ///
 /// Along the way, we do some additional error checking.
 pub(super) fn transcribe<'a>(
-    cx: &ExtCtxt<'a>,
+    psess: &'a ParseSess,
     interp: &FxHashMap<MacroRulesNormalizedIdent, NamedMatch>,
     src: &mbe::Delimited,
     src_span: DelimSpan,
     transparency: Transparency,
+    expand_id: LocalExpnId,
 ) -> PResult<'a, TokenStream> {
     // Nothing for us to transcribe...
     if src.tts.is_empty() {
@@ -137,8 +138,9 @@ pub(super) fn transcribe<'a>(
     // again, and we are done transcribing.
     let mut result: Vec<TokenTree> = Vec::new();
     let mut result_stack = Vec::new();
-    let mut marker = Marker(cx.current_expansion.id, transparency, Default::default());
+    let mut marker = Marker(expand_id, transparency, Default::default());
 
+    let dcx = &psess.dcx;
     loop {
         // Look at the last frame on the stack.
         // If it still has a TokenTree we have not looked at yet, use that tree.
@@ -201,19 +203,17 @@ pub(super) fn transcribe<'a>(
             seq @ mbe::TokenTree::Sequence(_, seq_rep) => {
                 match lockstep_iter_size(seq, interp, &repeats) {
                     LockstepIterSize::Unconstrained => {
-                        return Err(cx
-                            .dcx()
-                            .create_err(NoSyntaxVarsExprRepeat { span: seq.span() }));
+                        return Err(dcx.create_err(NoSyntaxVarsExprRepeat { span: seq.span() }));
                     }
 
                     LockstepIterSize::Contradiction(msg) => {
                         // FIXME: this really ought to be caught at macro definition time... It
                         // happens when two meta-variables are used in the same repetition in a
                         // sequence, but they come from different sequence matchers and repeat
                         // different amounts.
-                        return Err(cx
-                            .dcx()
-                            .create_err(MetaVarsDifSeqMatchers { span: seq.span(), msg }));
+                        return Err(
+                            dcx.create_err(MetaVarsDifSeqMatchers { span: seq.span(), msg })
+                        );
                     }
 
                     LockstepIterSize::Constraint(len, _) => {
@@ -227,9 +227,7 @@ pub(super) fn transcribe<'a>(
                                 // FIXME: this really ought to be caught at macro definition
                                 // time... It happens when the Kleene operator in the matcher and
                                 // the body for the same meta-variable do not match.
-                                return Err(cx
-                                    .dcx()
-                                    .create_err(MustRepeatOnce { span: sp.entire() }));
+                                return Err(dcx.create_err(MustRepeatOnce { span: sp.entire() }));
                             }
                         } else {
                             // 0 is the initial counter (we have done 0 repetitions so far). `len`
@@ -274,7 +272,7 @@ pub(super) fn transcribe<'a>(
                         MatchedSingle(ParseNtResult::Tt(tt)) => {
                             // `tt`s are emitted into the output stream directly as "raw tokens",
                             // without wrapping them into groups.
-                            maybe_use_metavar_location(cx, &stack, sp, tt, &mut marker)
+                            maybe_use_metavar_location(psess, &stack, sp, tt, &mut marker)
                         }
                         MatchedSingle(ParseNtResult::Ident(ident, is_raw)) => {
                             marker.visit_span(&mut sp);
@@ -295,7 +293,7 @@ pub(super) fn transcribe<'a>(
                         }
                         MatchedSeq(..) => {
                             // We were unable to descend far enough. This is an error.
-                            return Err(cx.dcx().create_err(VarStillRepeating { span: sp, ident }));
+                            return Err(dcx.create_err(VarStillRepeating { span: sp, ident }));
                         }
                     };
                     result.push(tt)
@@ -314,7 +312,7 @@ pub(super) fn transcribe<'a>(
 
             // Replace meta-variable expressions with the result of their expansion.
             mbe::TokenTree::MetaVarExpr(sp, expr) => {
-                transcribe_metavar_expr(cx, expr, interp, &mut marker, &repeats, &mut result, sp)?;
+                transcribe_metavar_expr(dcx, expr, interp, &mut marker, &repeats, &mut result, sp)?;
             }
 
             // If we are entering a new delimiter, we push its contents to the `stack` to be
@@ -374,7 +372,7 @@ pub(super) fn transcribe<'a>(
 ///   combine with each other and not with tokens outside of the sequence.
 /// - The metavariable span comes from a different crate, then we prefer the more local span.
 fn maybe_use_metavar_location(
-    cx: &ExtCtxt<'_>,
+    psess: &ParseSess,
     stack: &[Frame<'_>],
     mut metavar_span: Span,
     orig_tt: &TokenTree,
@@ -412,7 +410,7 @@ fn maybe_use_metavar_location(
                 && insert(mspans, dspan.entire(), metavar_span)
         }),
     };
-    if no_collision || cx.source_map().is_imported(metavar_span) {
+    if no_collision || psess.source_map().is_imported(metavar_span) {
         return orig_tt.clone();
     }
 
@@ -573,7 +571,7 @@ fn lockstep_iter_size(
 /// * `[ $( ${count(foo, 1)} ),* ]` will return an error because `${count(foo, 1)}` is
 ///   declared inside a single repetition and the index `1` implies two nested repetitions.
 fn count_repetitions<'a>(
-    cx: &ExtCtxt<'a>,
+    dcx: &'a DiagCtxt,
     depth_user: usize,
     mut matched: &NamedMatch,
     repeats: &[(usize, usize)],
@@ -610,7 +608,7 @@ fn count_repetitions<'a>(
         .and_then(|el| el.checked_sub(repeats.len()))
         .unwrap_or_default();
     if depth_user > depth_max {
-        return Err(out_of_bounds_err(cx, depth_max + 1, sp.entire(), "count"));
+        return Err(out_of_bounds_err(dcx, depth_max + 1, sp.entire(), "count"));
     }
 
     // `repeats` records all of the nested levels at which we are currently
@@ -626,15 +624,15 @@ fn count_repetitions<'a>(
     }
 
     if let MatchedSingle(_) = matched {
-        return Err(cx.dcx().create_err(CountRepetitionMisplaced { span: sp.entire() }));
+        return Err(dcx.create_err(CountRepetitionMisplaced { span: sp.entire() }));
     }
 
     count(depth_user, depth_max, matched)
 }
 
 /// Returns a `NamedMatch` item declared on the LHS given an arbitrary [Ident]
 fn matched_from_ident<'ctx, 'interp, 'rslt>(
-    cx: &ExtCtxt<'ctx>,
+    dcx: &'ctx DiagCtxt,
     ident: Ident,
     interp: &'interp FxHashMap<MacroRulesNormalizedIdent, NamedMatch>,
 ) -> PResult<'ctx, &'rslt NamedMatch>
@@ -643,12 +641,12 @@ where
 {
     let span = ident.span;
     let key = MacroRulesNormalizedIdent::new(ident);
-    interp.get(&key).ok_or_else(|| cx.dcx().create_err(MetaVarExprUnrecognizedVar { span, key }))
+    interp.get(&key).ok_or_else(|| dcx.create_err(MetaVarExprUnrecognizedVar { span, key }))
 }
 
 /// Used by meta-variable expressions when an user input is out of the actual declared bounds. For
 /// example, index(999999) in an repetition of only three elements.
-fn out_of_bounds_err<'a>(cx: &ExtCtxt<'a>, max: usize, span: Span, ty: &str) -> Diag<'a> {
+fn out_of_bounds_err<'a>(dcx: &'a DiagCtxt, max: usize, span: Span, ty: &str) -> Diag<'a> {
     let msg = if max == 0 {
         format!(
             "meta-variable expression `{ty}` with depth parameter \
@@ -660,11 +658,11 @@ fn out_of_bounds_err<'a>(cx: &ExtCtxt<'a>, max: usize, span: Span, ty: &str) ->
              must be less than {max}"
         )
     };
-    cx.dcx().struct_span_err(span, msg)
+    dcx.struct_span_err(span, msg)
 }
 
 fn transcribe_metavar_expr<'a>(
-    cx: &ExtCtxt<'a>,
+    dcx: &'a DiagCtxt,
     expr: &MetaVarExpr,
     interp: &FxHashMap<MacroRulesNormalizedIdent, NamedMatch>,
     marker: &mut Marker,
@@ -679,8 +677,8 @@ fn transcribe_metavar_expr<'a>(
     };
     match *expr {
         MetaVarExpr::Count(original_ident, depth) => {
-            let matched = matched_from_ident(cx, original_ident, interp)?;
-            let count = count_repetitions(cx, depth, matched, repeats, sp)?;
+            let matched = matched_from_ident(dcx, original_ident, interp)?;
+            let count = count_repetitions(dcx, depth, matched, repeats, sp)?;
             let tt = TokenTree::token_alone(
                 TokenKind::lit(token::Integer, sym::integer(count), None),
                 visited_span(),
@@ -689,7 +687,7 @@ fn transcribe_metavar_expr<'a>(
         }
         MetaVarExpr::Ignore(original_ident) => {
             // Used to ensure that `original_ident` is present in the LHS
-            let _ = matched_from_ident(cx, original_ident, interp)?;
+            let _ = matched_from_ident(dcx, original_ident, interp)?;
         }
         MetaVarExpr::Index(depth) => match repeats.iter().nth_back(depth) {
             Some((index, _)) => {
@@ -698,7 +696,7 @@ fn transcribe_metavar_expr<'a>(
                     visited_span(),
                 ));
             }
-            None => return Err(out_of_bounds_err(cx, repeats.len(), sp.entire(), "index")),
+            None => return Err(out_of_bounds_err(dcx, repeats.len(), sp.entire(), "index")),
         },
         MetaVarExpr::Len(depth) => match repeats.iter().nth_back(depth) {
             Some((_, length)) => {
@@ -707,7 +705,7 @@ fn transcribe_metavar_expr<'a>(
                     visited_span(),
                 ));
             }
-            None => return Err(out_of_bounds_err(cx, repeats.len(), sp.entire(), "len")),
+            None => return Err(out_of_bounds_err(dcx, repeats.len(), sp.entire(), "len")),
         },
     }
     Ok(())

compiler/rustc_hir_typeck/src/coercion.rs

@@ -1871,11 +1871,8 @@ impl<'tcx, 'exprs, E: AsCoercionSite> CoerceMany<'tcx, 'exprs, E> {
         // If this is due to a block, then maybe we forgot a `return`/`break`.
         if due_to_block
             && let Some(expr) = expression
-            && let Some((parent_fn_decl, parent_id)) = fcx
-                .tcx
-                .hir()
-                .parent_iter(block_or_return_id)
-                .find_map(|(_, node)| Some((node.fn_decl()?, node.associated_body()?.0)))
+            && let Some(parent_fn_decl) =
+                fcx.tcx.hir().fn_decl_by_hir_id(fcx.tcx.local_def_id_to_hir_id(fcx.body_id))
         {
             fcx.suggest_missing_break_or_return_expr(
                 &mut err,
@@ -1884,7 +1881,7 @@ impl<'tcx, 'exprs, E: AsCoercionSite> CoerceMany<'tcx, 'exprs, E> {
                 expected,
                 found,
                 block_or_return_id,
-                parent_id,
+                fcx.body_id,
             );
         }
 

compiler/rustc_hir_typeck/src/method/probe.rs

@@ -395,8 +395,15 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         // ambiguous.
         if let Some(bad_ty) = &steps.opt_bad_ty {
             if is_suggestion.0 {
-                // Ambiguity was encountered during a suggestion. Just keep going.
-                debug!("ProbeContext: encountered ambiguity in suggestion");
+                // Ambiguity was encountered during a suggestion. There's really
+                // not much use in suggesting methods in this case.
+                return Err(MethodError::NoMatch(NoMatchData {
+                    static_candidates: Vec::new(),
+                    unsatisfied_predicates: Vec::new(),
+                    out_of_scope_traits: Vec::new(),
+                    similar_candidate: None,
+                    mode,
+                }));
             } else if bad_ty.reached_raw_pointer
                 && !self.tcx.features().arbitrary_self_types
                 && !self.tcx.sess.at_least_rust_2018()

compiler/rustc_mir_transform/src/dataflow_const_prop.rs

@@ -142,10 +142,10 @@ impl<'tcx> ValueAnalysis<'tcx> for ConstAnalysis<'_, 'tcx> {
                     _ => return,
                 };
                 if let Some(variant_target_idx) = variant_target {
-                    for (field_index, operand) in operands.iter().enumerate() {
+                    for (field_index, operand) in operands.iter_enumerated() {
                         if let Some(field) = self.map().apply(
                             variant_target_idx,
-                            TrackElem::Field(FieldIdx::from_usize(field_index)),
+                            TrackElem::Field(field_index),
                         ) {
                             self.assign_operand(state, field, operand);
                         }

compiler/rustc_mir_transform/src/instsimplify.rs

@@ -9,7 +9,6 @@ use rustc_middle::ty::layout::ValidityRequirement;
 use rustc_middle::ty::{self, GenericArgsRef, ParamEnv, Ty, TyCtxt};
 use rustc_span::sym;
 use rustc_span::symbol::Symbol;
-use rustc_target::abi::FieldIdx;
 use rustc_target::spec::abi::Abi;
 
 pub struct InstSimplify;
@@ -217,11 +216,11 @@ impl<'tcx> InstSimplifyContext<'tcx, '_> {
                     && let Some(place) = operand.place()
                 {
                     let variant = adt_def.non_enum_variant();
-                    for (i, field) in variant.fields.iter().enumerate() {
+                    for (i, field) in variant.fields.iter_enumerated() {
                         let field_ty = field.ty(self.tcx, args);
                         if field_ty == *cast_ty {
                             let place = place.project_deeper(
-                                &[ProjectionElem::Field(FieldIdx::from_usize(i), *cast_ty)],
+                                &[ProjectionElem::Field(i, *cast_ty)],
                                 self.tcx,
                             );
                             let operand = if operand.is_move() {

config.example.toml

@@ -904,9 +904,6 @@
 # on linux
 #src-tarball = true
 
-# Whether to allow failures when building tools
-#missing-tools = false
-
 # List of compression formats to use when generating dist tarballs. The list of
 # formats is provided to rust-installer, which must support all of them.
 #

library/core/src/num/int_macros.rs

@@ -1282,8 +1282,7 @@ macro_rules! int_impl {
                 concat!(stringify!($SelfT), "::unchecked_shl cannot overflow"),
                 (
                     rhs: u32 = rhs,
-                    bits: u32 = Self::BITS,
-                ) => rhs < bits,
+                ) => rhs < <$ActualT>::BITS,
             );
 
             // SAFETY: this is guaranteed to be safe by the caller.
@@ -1381,8 +1380,7 @@ macro_rules! int_impl {
                 concat!(stringify!($SelfT), "::unchecked_shr cannot overflow"),
                 (
                     rhs: u32 = rhs,
-                    bits: u32 = Self::BITS,
-                ) => rhs < bits,
+                ) => rhs < <$ActualT>::BITS,
             );
 
             // SAFETY: this is guaranteed to be safe by the caller.

library/core/src/num/uint_macros.rs

@@ -1369,8 +1369,7 @@ macro_rules! uint_impl {
                 concat!(stringify!($SelfT), "::unchecked_shl cannot overflow"),
                 (
                     rhs: u32 = rhs,
-                    bits: u32 = Self::BITS,
-                ) => rhs < bits,
+                ) => rhs < <$ActualT>::BITS,
             );
 
             // SAFETY: this is guaranteed to be safe by the caller.
@@ -1468,8 +1467,7 @@ macro_rules! uint_impl {
                 concat!(stringify!($SelfT), "::unchecked_shr cannot overflow"),
                 (
                     rhs: u32 = rhs,
-                    bits: u32 = Self::BITS,
-                ) => rhs < bits,
+                ) => rhs < <$ActualT>::BITS,
             );
 
             // SAFETY: this is guaranteed to be safe by the caller.

src/bootstrap/src/core/config/config.rs

@@ -314,7 +314,6 @@ pub struct Config {
     pub save_toolstates: Option<PathBuf>,
     pub print_step_timings: bool,
     pub print_step_rusage: bool,
-    pub missing_tools: bool, // FIXME: Deprecated field. Remove it at 2024.
 
     // Fallback musl-root for all targets
     pub musl_root: Option<PathBuf>,
@@ -905,7 +904,6 @@ define_config! {
         sign_folder: Option<String> = "sign-folder",
         upload_addr: Option<String> = "upload-addr",
         src_tarball: Option<bool> = "src-tarball",
-        missing_tools: Option<bool> = "missing-tools",
         compression_formats: Option<Vec<String>> = "compression-formats",
         compression_profile: Option<String> = "compression-profile",
         include_mingw_linker: Option<bool> = "include-mingw-linker",
@@ -1936,7 +1934,6 @@ impl Config {
                 sign_folder,
                 upload_addr,
                 src_tarball,
-                missing_tools,
                 compression_formats,
                 compression_profile,
                 include_mingw_linker,
@@ -1946,7 +1943,6 @@ impl Config {
             config.dist_compression_formats = compression_formats;
             set(&mut config.dist_compression_profile, compression_profile);
             set(&mut config.rust_dist_src, src_tarball);
-            set(&mut config.missing_tools, missing_tools);
             set(&mut config.dist_include_mingw_linker, include_mingw_linker)
         }
 

src/bootstrap/src/utils/change_tracker.rs

@@ -190,4 +190,9 @@ pub const CONFIG_CHANGE_HISTORY: &[ChangeInfo] = &[
         severity: ChangeSeverity::Warning,
         summary: "`rust.lld` has a new default value of `true` on `x86_64-unknown-linux-gnu`. Starting at stage1, `rust-lld` will thus be this target's default linker. No config changes should be necessary.",
     },
+    ChangeInfo {
+        change_id: 125535,
+        severity: ChangeSeverity::Warning,
+        summary: "Removed `dist.missing-tools` configuration as it was deprecated long time ago.",
+    },
 ];

tests/crashes/123255.rs

@@ -0,0 +1,13 @@
+//@ known-bug: rust-lang/rust#123255
+//@ edition:2021
+#![crate_type = "lib"]
+
+pub fn a() {}
+
+mod handlers {
+    pub struct C(&());
+    pub fn c() -> impl Fn() -> C {
+        let a1 = ();
+        || C((crate::a(), a1).into())
+    }
+}

tests/crashes/123276.rs

@@ -0,0 +1,25 @@
+//@ known-bug: rust-lang/rust#123276
+//@ edition:2021
+
+async fn create_task() {
+    _ = Some(async { bind(documentation_filter()) });
+}
+
+async fn bind<Fut, F: Filter<Future = Fut>>(_: F) {}
+
+fn documentation_filter() -> impl Filter {
+    AndThen
+}
+
+trait Filter {
+    type Future;
+}
+
+struct AndThen;
+
+impl Filter for AndThen
+where
+    Foo: Filter,
+{
+    type Future = ();
+}

tests/crashes/123887.rs

@@ -0,0 +1,15 @@
+//@ known-bug: rust-lang/rust#123887
+//@ compile-flags: -Clink-dead-code
+
+#![feature(extern_types)]
+#![feature(unsized_fn_params)]
+
+extern "C" {
+    pub type ExternType;
+}
+
+impl ExternType {
+    pub fn f(self) {}
+}
+
+pub fn main() {}

tests/crashes/125013-1.rs

@@ -0,0 +1,5 @@
+//@ known-bug: rust-lang/rust#125013
+//@ edition:2021
+use io::{self as std};
+use std::ops::Deref::{self as io};
+pub fn main() {}

tests/crashes/125013-2.rs

@@ -0,0 +1,16 @@
+//@ known-bug: rust-lang/rust#125013
+//@ edition:2021
+mod a {
+  pub mod b {
+    pub mod c {
+      pub trait D {}
+    }
+  }
+}
+
+use a::*;
+
+use e as b;
+use b::c::D as e;
+
+fn main() { }

tests/crashes/125014.rs

@@ -0,0 +1,17 @@
+//@ known-bug: rust-lang/rust#125014
+//@ compile-flags: -Znext-solver=coherence
+#![feature(specialization)]
+
+trait Foo {}
+
+impl Foo for <u16 as Assoc>::Output {}
+
+impl Foo for u32 {}
+
+trait Assoc {
+    type Output;
+}
+impl Output for u32 {}
+impl Assoc for <u16 as Assoc>::Output {
+    default type Output = bool;
+}

tests/crashes/125059.rs

@@ -0,0 +1,12 @@
+//@ known-bug: rust-lang/rust#125059
+#![feature(deref_patterns)]
+#![allow(incomplete_features)]
+
+fn simple_vec(vec: Vec<u32>) -> u32 {
+   (|| match Vec::<u32>::new() {
+        deref!([]) => 100,
+        _ => 2000,
+    })()
+}
+
+fn main() {}

tests/crashes/125323.rs

@@ -0,0 +1,6 @@
+//@ known-bug: rust-lang/rust#125323
+fn main() {
+    for _ in 0..0 {
+        [(); loop {}];
+    }
+}

tests/crashes/125370.rs

@@ -0,0 +1,16 @@
+//@ known-bug: rust-lang/rust#125370
+
+type Field3 = i64;
+
+#[repr(C)]
+union DummyUnion {
+    field3: Field3,
+}
+
+const UNION: DummyUnion = loop {};
+
+const fn read_field2() -> Field2 {
+    const FIELD2: Field2 = loop {
+        UNION.field3
+    };
+}

tests/crashes/125432.rs

@@ -0,0 +1,17 @@
+//@ known-bug: rust-lang/rust#125432
+
+fn separate_arms() {
+    // Here both arms perform assignments, but only one is illegal.
+
+    let mut x = None;
+    match x {
+        None => {
+            // It is ok to reassign x here, because there is in
+            // fact no outstanding loan of x!
+            x = Some(0);
+        }
+        Some(right) => consume(right),
+    }
+}
+
+fn main() {}

tests/crashes/125476.rs

@@ -0,0 +1,3 @@
+//@ known-bug: rust-lang/rust#125476
+pub struct Data([u8; usize::MAX >> 16]);
+const _: &'static [Data] = &[];

tests/crashes/125512.rs

@@ -0,0 +1,10 @@
+//@ known-bug: rust-lang/rust#125512
+//@ edition:2021
+#![feature(object_safe_for_dispatch)]
+trait B {
+    fn f(a: A) -> A;
+}
+trait A {
+    fn concrete(b: B) -> B;
+}
+fn main() {}

tests/crashes/125520.rs

@@ -0,0 +1,16 @@
+//@ known-bug: #125520
+#![feature(generic_const_exprs)]
+
+struct Outer<const A: i64, const B: i64>();
+impl<const A: usize, const B: usize> Outer<A, B>
+where
+    [(); A + (B * 2)]:,
+{
+    fn i() -> Self {
+        Self
+    }
+}
+
+fn main() {
+    Outer::<1, 1>::o();
+}

tests/mir-opt/inline/unchecked_shifts.unchecked_shl_unsigned_smaller.Inline.panic-abort.diff

@@ -29,7 +29,7 @@
       }
 
       bb1: {
-+         _6 = core::num::<impl u16>::unchecked_shl::precondition_check(_4, const core::num::<impl u16>::BITS) -> [return: bb2, unwind unreachable];
++         _6 = core::num::<impl u16>::unchecked_shl::precondition_check(_4) -> [return: bb2, unwind unreachable];
 +     }
 + 
 +     bb2: {

tests/mir-opt/inline/unchecked_shifts.unchecked_shl_unsigned_smaller.Inline.panic-unwind.diff

@@ -29,7 +29,7 @@
       }
 
       bb1: {
-+         _6 = core::num::<impl u16>::unchecked_shl::precondition_check(_4, const core::num::<impl u16>::BITS) -> [return: bb2, unwind unreachable];
++         _6 = core::num::<impl u16>::unchecked_shl::precondition_check(_4) -> [return: bb2, unwind unreachable];
 +     }
 + 
 +     bb2: {

tests/mir-opt/inline/unchecked_shifts.unchecked_shr_signed_bigger.Inline.panic-abort.diff

@@ -29,7 +29,7 @@
       }
 
       bb1: {
-+         _6 = core::num::<impl i64>::unchecked_shr::precondition_check(_4, const core::num::<impl i64>::BITS) -> [return: bb2, unwind unreachable];
++         _6 = core::num::<impl i64>::unchecked_shr::precondition_check(_4) -> [return: bb2, unwind unreachable];
 +     }
 + 
 +     bb2: {

tests/mir-opt/inline/unchecked_shifts.unchecked_shr_signed_bigger.Inline.panic-unwind.diff

@@ -29,7 +29,7 @@
       }
 
       bb1: {
-+         _6 = core::num::<impl i64>::unchecked_shr::precondition_check(_4, const core::num::<impl i64>::BITS) -> [return: bb2, unwind unreachable];
++         _6 = core::num::<impl i64>::unchecked_shr::precondition_check(_4) -> [return: bb2, unwind unreachable];
 +     }
 + 
 +     bb2: {

tests/ui/issues/issue-33992.rs

@@ -5,9 +5,6 @@
 
 #![feature(linkage)]
 
-#[linkage = "common"]
-pub static mut TEST1: u32 = 0u32;
-
 #[linkage = "external"]
 pub static TEST2: bool = true;
 

tests/ui/linkage-attr/linkage-attr-mutable-static.rs

@@ -0,0 +1,15 @@
+//! The symbols are resolved by the linker. It doesn't make sense to change
+//! them at runtime, so deny mutable statics with #[linkage].
+
+#![feature(linkage)]
+
+fn main() {
+    extern "C" {
+        #[linkage = "weak"] //~ ERROR mutable statics are not allowed with `#[linkage]`
+        static mut ABC: *const u8;
+    }
+
+    unsafe {
+        assert_eq!(ABC as usize, 0);
+    }
+}

tests/ui/linkage-attr/linkage-attr-mutable-static.stderr

@@ -0,0 +1,10 @@
+error: mutable statics are not allowed with `#[linkage]`
+  --> $DIR/linkage-attr-mutable-static.rs:8:9
+   |
+LL |         #[linkage = "weak"]
+   |         ^^^^^^^^^^^^^^^^^^^
+   |
+   = note: making the static mutable would allow changing which symbol the static references rather than make the target of the symbol mutable
+
+error: aborting due to 1 previous error
+

tests/ui/methods/suggest-method-on-call-for-ambig-receiver.rs

@@ -0,0 +1,16 @@
+// Fix for <https://github.com/rust-lang/rust/issues/125432>.
+
+fn separate_arms() {
+    let mut x = None;
+    match x {
+        None => {
+            x = Some(0);
+        }
+        Some(right) => {
+            consume(right);
+            //~^ ERROR cannot find function `consume` in this scope
+        }
+    }
+}
+
+fn main() {}

tests/ui/methods/suggest-method-on-call-for-ambig-receiver.stderr

@@ -0,0 +1,9 @@
+error[E0425]: cannot find function `consume` in this scope
+  --> $DIR/suggest-method-on-call-for-ambig-receiver.rs:10:13
+   |
+LL |             consume(right);
+   |             ^^^^^^^ not found in this scope
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0425`.

tests/ui/return/dont-suggest-through-inner-const.rs

@@ -0,0 +1,9 @@
+const fn f() -> usize {
+    //~^ ERROR mismatched types
+    const FIELD: usize = loop {
+        0
+        //~^ ERROR mismatched types
+    };
+}
+
+fn main() {}

tests/ui/return/dont-suggest-through-inner-const.stderr

@@ -0,0 +1,17 @@
+error[E0308]: mismatched types
+  --> $DIR/dont-suggest-through-inner-const.rs:4:9
+   |
+LL |         0
+   |         ^ expected `()`, found integer
+
+error[E0308]: mismatched types
+  --> $DIR/dont-suggest-through-inner-const.rs:1:17
+   |
+LL | const fn f() -> usize {
+   |          -      ^^^^^ expected `usize`, found `()`
+   |          |
+   |          implicitly returns `()` as its body has no tail or `return` expression
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0308`.

triagebot.toml

@@ -468,6 +468,19 @@ message_on_remove = "PR #{number}'s beta-nomination has been removed."
 message_on_close = "PR #{number} has been closed. Thanks for participating!"
 message_on_reopen = "PR #{number} has been reopened. Pinging @*T-rustdoc*."
 
+# FIXME: Patch triagebot to support `notify-zulip.<label>` getting mapped to an array of actions.
+#        At the moment, the beta-accepted+T-rustdoc action fully occupies the beta-accepted slot
+#        preventing others from adding more beta-accepted actions.
+[notify-zulip."beta-accepted"]
+required_labels = ["T-rustdoc"]
+zulip_stream = 266220 # #t-rustdoc
+# Put it in the same thread as beta-nominated.
+topic = "beta-nominated: #{number}"
+message_on_add = "PR #{number} has been **accepted** for beta backport."
+message_on_remove = "PR #{number}'s beta-acceptance has been **removed**."
+message_on_close = "PR #{number} has been closed. Thanks for participating!"
+message_on_reopen = "PR #{number} has been reopened. Pinging @*T-rustdoc*."
+
 # FIXME: Patch triagebot to support `notify-zulip.<label>` getting mapped to an array of actions.
 #        At the moment, the stable-nominated+T-rustdoc action fully occupies the stable-nominated slot
 #        preventing others from adding more stable-nominated actions.
@@ -492,6 +505,19 @@ message_on_remove = "PR #{number}'s stable-nomination has been removed."
 message_on_close = "PR #{number} has been closed. Thanks for participating!"
 message_on_reopen = "PR #{number} has been reopened. Pinging @*T-rustdoc*."
 
+# FIXME: Patch triagebot to support `notify-zulip.<label>` getting mapped to an array of actions.
+#        At the moment, the stable-accepted+T-rustdoc action fully occupies the stable-accepted slot
+#        preventing others from adding more stable-accepted actions.
+[notify-zulip."stable-accepted"]
+required_labels = ["T-rustdoc"]
+zulip_stream = 266220 # #t-rustdoc
+# Put it in the same thread as stable-nominated.
+topic = "stable-nominated: #{number}"
+message_on_add = "PR #{number} has been **accepted** for stable backport."
+message_on_remove = "PR #{number}'s stable-acceptance has been **removed**."
+message_on_close = "PR #{number} has been closed. Thanks for participating!"
+message_on_reopen = "PR #{number} has been reopened. Pinging @*T-rustdoc*."
+
 [notify-zulip."I-types-nominated"]
 zulip_stream = 326866 # #T-types/nominated
 topic = "#{number}: {title}"
@@ -810,6 +836,9 @@ cc = ["@rust-lang/project-exploit-mitigations", "@rcvalle"]
 [mentions."src/doc/rustc/src/check-cfg.md"]
 cc = ["@Urgau"]
 
+[mentions."src/doc/rustc/src/check-cfg"]
+cc = ["@Urgau"]
+
 [mentions."src/doc/rustc/src/platform-support"]
 cc = ["@Nilstrieb"]