[clang] [Clang] Fix another parameter mapping substitution bug (PR #162155)

[Corentin Jabot via cfe-commits]

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@@ -277,7 +277,8 @@ class HashParameterMapping : public RecursiveASTVisitor<HashParameterMapping> {
   bool VisitTemplateTypeParmType(TemplateTypeParmType *T) {
     // A lambda expression can introduce template parameters that don't have
     // corresponding template arguments yet.
-    if (T->getDepth() >= TemplateArgs.getNumLevels())
+    if (T->getDepth() >= TemplateArgs.getNumLevels() ||
+        !TemplateArgs.hasTemplateArgument(T->getDepth(), T->getIndex()))
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cor3ntin wrote:

No, they are slightly different scenarios. I split the condition in 2 and added a comment, it's probably clearer that way. Thanks!

https://github.com/llvm/llvm-project/pull/162155