[clang] [Clang] Do not skip over `RequiresExprBodyDecl` when creating lambdas (PR #147764)

[Matheus Izvekov via cfe-commits]

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@@ -1088,6 +1088,9 @@ void CXXNameMangler::mangleNameWithAbiTags(GlobalDecl GD,
     return;
   }
 
+  while (DC->isRequiresExprBody())
+    DC = DC->getParent();
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mizvekov wrote:

With a compound expression you can introduce lots of other kinds of DeclContexts here.

https://github.com/llvm/llvm-project/pull/147764