[clang] [clang] Reject initializing constexpr struct/union types with compound literals that contain non null pointers (PR #228776)

[Yanzuo Liu via cfe-commits]

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zwuis wrote:

FYI https://discourse.llvm.org/t/updating-expectations-for-the-new-constexpr-engine/88853

https://github.com/llvm/llvm-project/pull/228776