================
@@ -2667,6 +2667,22 @@ void Sema::MergeTypedefNameDecl(Scope *S,
TypedefNameDecl *New,
else
New->setTypeSourceInfo(OldTD->getTypeSourceInfo());
+ // An anonymous enum is recognized as a redeclaration only when its
typedef
+ // name gets merged, at which point two distinct enum types already
exist.
+ // Retype the new enumerators to the old enum type, matching the typedef
+ // merge above; otherwise the merged typedef and its enumerators disagree
+ // on the type (GH213299).
+ //
+ // FIXME: The global module restriction only limits the impact of this
+ // change; relax it if the issue shows up in other contexts.
+ if (Module *M = OldTag->getOwningModule(); M && M->isGlobalModule())
----------------
erichkeane wrote:
this top level (and probably the new tag) needs curleys.
https://github.com/llvm/llvm-project/pull/214121
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