[clang] [clang] Fix crash in concept deprecation (PR #98622)

[via cfe-commits]

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@@ -36,4 +36,11 @@ template <C T>
 // expected-warning at -1 {{'C' is deprecated}}
 //   expected-note@#C {{'C' has been explicitly marked deprecated here}}
 void f();
+
+template <int>
+auto b() = delete; // #b
+
+decltype(b<0>()) x;
+// expected-error at -1 {{call to deleted function 'b'}}
+//   expected-note@#b {{candidate function [with $0 = 0] has been explicitly deleted}}
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cor3ntin wrote:

Can you put that in a GH98164 namespace?

https://github.com/llvm/llvm-project/pull/98622