================
@@ -3990,9 +3991,16 @@ QualType Sema::CheckTemplateIdType(TemplateName Name,
if (Inst.isInvalid())
return QualType();
- CanonType = SubstType(Pattern->getUnderlyingType(),
- TemplateArgLists, AliasTemplate->getLocation(),
- AliasTemplate->getDeclName());
+ if (!RebuildingTypesInCurrentInstantiation) {
----------------
erichkeane wrote:
This is probably better/less likely to be screwed up in the future if we
instead immediately do a 'SavedContext.pop()` if this condition is true, which
leaves the SubstType code from being repeated/accidentially diverging.
https://github.com/llvm/llvm-project/pull/75069
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