================
@@ -1881,6 +1871,15 @@ Decl *TemplateInstantiator::TransformDecl(SourceLocation
Loc, Decl *D) {
TemplateArgument Arg = TemplateArgs(TTP->getDepth(), TTP->getPosition());
if (TTP->isParameterPack()) {
+ // We might not have an index for pack expansion when normalizing
+ // constraint expressions. In that case, resort to instantiation scopes
+ // for the transformed declarations.
+ if (SemaRef.ArgumentPackSubstitutionIndex == -1 &&
+ SemaRef.CodeSynthesisContexts.back().Kind ==
+ Sema::CodeSynthesisContext::ConstraintNormalization) {
+ return SemaRef.FindInstantiatedDecl(Loc, cast<NamedDecl>(D),
+ TemplateArgs);
----------------
mizvekov wrote:
Why don't we have an index in these cases? Is this something we could fix in
the future?
https://github.com/llvm/llvm-project/pull/115120
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