[clang] [Clang] Avoid querying tag definitions for invalid DeclSpecs (PR #210085)

[Osama Abdelkader via cfe-commits]

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@@ -14,6 +14,9 @@ void f() {
 struct PR209000 {
 } auto; // expected-error {{'auto' cannot be combined with a type specifier}}
 
+auto union { // expected-error {{cannot combine with previous 'auto' declaration specifier}}
+} foo<>; // expected-error {{no template named 'foo'}}
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osamakader wrote:

It was an oversight. Thanks.

https://github.com/llvm/llvm-project/pull/210085