[clang] [clang] Fix C++20 list initialization of const references to arrays of unknown bound (PR #218225)

[Younan Zhang via cfe-commits]

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@@ -48,3 +48,24 @@ void gh151716_f() {
 }
 
 } // namespace One
+
+namespace Two {
+
+// A braced-init-list may also bind to a const lvalue reference to an array of
+// unknown bound, not just to an rvalue reference. This used to crash in
+// CodeGen with "type mismatch in call argument!" (GH215501).
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zyn0217 wrote:

```suggestion

```

https://github.com/llvm/llvm-project/pull/218225