[clang] [Clang][Sema] Reject array prvalue operands (PR #140702)

[via cfe-commits]

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@@ -7639,6 +7639,8 @@ def warn_param_mismatched_alignment : Warning<
 
 def err_objc_object_assignment : Error<
   "cannot assign to class object (%0 invalid)">;
+def err_typecheck_array_prvalue_operand : Error<
+  "array prvalue is not permitted">;
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Sirraide wrote:

> It's unfortunate to mention "prvalue" at all because that's language lawyer wording

Yeah, I agree; I think just reusing `err_typecheck_invalid_operands` would be clearer.

https://github.com/llvm/llvm-project/pull/140702