[clang] [Clang] Add diagnostic reasoning for unsatisfied is_destructible trait (PR #167291)

[Younan Zhang via cfe-commits]

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@@ -2399,6 +2400,66 @@ static void DiagnoseNonConstructibleReason(
   SemaRef.Diag(D->getLocation(), diag::note_defined_here) << D;
 }
 
+static void DiagnoseNonDestructibleReason(Sema &SemaRef, SourceLocation Loc,
+                                          QualType T) {
+
+  QualType CoreT = T.getCanonicalType();
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zyn0217 wrote:

What does `Core` stand for?

https://github.com/llvm/llvm-project/pull/167291