Auto merge of #99520 - matthiaskrgr:rollup-05uuv5s, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - #99212 (introduce `implied_by` in `#[unstable]` attribute)
 - #99352 (Use `typeck_results` to avoid duplicate `ast_ty_to_ty` call)
 - #99355 (better error for bad depth parameter on macro metavar expr)
 - #99480 (Diagnostic width span is not added when '0$' is used as width in format strings)
 - #99488 (compiletest: Allow using revisions with debuginfo tests.)
 - #99489 (rustdoc UI fixes)
 - #99508 (Avoid `Symbol` to `String` conversions)
 - #99510 (adapt assembly/static-relocation-model test for LLVM change)
 - #99516 (Use new tracking issue for proc_macro::tracked_*.)

Failed merges:

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

1 files changed, 7 insertions, 0 deletions

diff --git a/compiler/rustc_metadata/src/rmeta/decoder.rs b/compiler/rustc_metadata/src/rmeta/decoder.rs
index f0874f8f2da..aa5705d3fcd 100644
--- a/compiler/rustc_metadata/src/rmeta/decoder.rs
+++ b/compiler/rustc_metadata/src/rmeta/decoder.rs
@@ -951,6 +951,13 @@ impl<'a, 'tcx> CrateMetadataRef<'a> {
         tcx.arena.alloc_from_iter(self.root.lib_features.decode(self))
     }
 
+    /// Iterates over the stability implications in the given crate (when a `#[unstable]` attribute
+    /// has an `implied_by` meta item, then the mapping from the implied feature to the actual
+    /// feature is a stability implication).
+    fn get_stability_implications(self, tcx: TyCtxt<'tcx>) -> &'tcx [(Symbol, Symbol)] {
+        tcx.arena.alloc_from_iter(self.root.stability_implications.decode(self))
+    }
+
     /// Iterates over the language items in the given crate.
     fn get_lang_items(self, tcx: TyCtxt<'tcx>) -> &'tcx [(DefId, usize)] {
         tcx.arena.alloc_from_iter(