[clang] [clang] Diagnose dangling references for parenthesized aggregate initialization. (PR #117690)

[Haojian Wu via cfe-commits]

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@@ -116,6 +116,7 @@ void foo(int n) { // expected-note {{declared here}}
   B b2(A(1), {}, 1);
   // beforecxx20-warning at -1 {{aggregate initialization of type 'A' from a parenthesized list of values is a C++20 extension}}
   // beforecxx20-warning at -2 {{aggregate initialization of type 'B' from a parenthesized list of values is a C++20 extension}}
+  // expected-warning at -3 {{temporary whose address is used as value of local variable 'b2' will be destroyed at the end of the full-expression}}
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hokein wrote:

Done. Added one to the `cxx20-warn-dangling-paren-list-agg-init.cpp`.

https://github.com/llvm/llvm-project/pull/117690