show deprecation message in rustdoc, too

Author: RalfJung

src/librustdoc/clean/types.rs

@@ -6,7 +6,9 @@ use std::{fmt, iter};
 
 use arrayvec::ArrayVec;
 use rustc_abi::{ExternAbi,VariantIdx};
-use rustc_attr_parsing::{ConstStability,Deprecation,Stability,StableSince};
+use rustc_attr_parsing::{
+AllowedThroughUnstableModules,ConstStability,Deprecation,Stability,StableSince,
+};
 use rustc_data_structures::fx::{FxHashSet,FxIndexMap,FxIndexSet};
 use rustc_hir::def::{CtorKind,DefKind,Res};
 use rustc_hir::def_id::{CrateNum,DefId,LOCAL_CRATE,LocalDefId};
@@ -406,15 +408,19 @@ impl Item {
 // were never supposed to work at all.
 let stab = self.stability(tcx)?;
 iflet rustc_attr_parsing::StabilityLevel::Stable{
-allowed_through_unstable_modules:Some(_),
+allowed_through_unstable_modules:Some(note),
  ..
 } = stab.level
 {
+let note = match note {
+AllowedThroughUnstableModules::WithDeprecation(note) => Some(note),
+// FIXME: Would be better to say *something* here about the *path* being
+// deprecated rather than the item.
+AllowedThroughUnstableModules::WithoutDeprecation => None,
+};
 Some(Deprecation{
-// FIXME(#131676, #135003): when a note is added to this stability tag,
-// translate it here
 since: rustc_attr_parsing::DeprecatedSince::Unspecified,
-note:None,
+ note,
 suggestion:None,
 })
 }else{