[clang] [clang] Fixed an assertion failure triggered when instantiating a template with an expr that references an invalid decl (PR #140905)

[Shafik Yaghmour via cfe-commits]

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@@ -4552,6 +4552,9 @@ LocalInstantiationScope::findInstantiationOf(const Decl *D) {
       isa<CXXDeductionGuideDecl>(D->getDeclContext()))
     return nullptr;
 
+  if (D->isInvalidDecl())
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shafik wrote:

Why can't we just check after `D = getCanonicalParmVarDecl(D);`?

https://github.com/llvm/llvm-project/pull/140905