================
@@ -6286,8 +6284,18 @@ NamedDecl *Sema::FindInstantiatedDecl(SourceLocation
Loc, NamedDecl *D,
QualType T = CheckTemplateIdType(TemplateName(TD), Loc, Args);
if (T.isNull())
return nullptr;
- auto *SubstRecord = T->getAsCXXRecordDecl();
- assert(SubstRecord && "class template id not a class type?");
+ CXXRecordDecl *SubstRecord = T->getAsCXXRecordDecl();
+
+ if (!SubstRecord) {
+ // The T can be a dependent TemplateSpecializationType when
+ // performing a substitution for building a deduction guide,
----------------
cor3ntin wrote:
```suggestion
// T can be a dependent TemplateSpecializationType when
// performing a substitution for building a deduction guide.
```
https://github.com/llvm/llvm-project/pull/77890
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