[clang] [Clang][Sema] Disable checking invalid template id in initializer of primary variable template `std::format_kind` with libstdc++ (PR #139560)

[Yanzuo Liu via cfe-commits]

zwuis wrote:

@cor3ntin I don't have commit access. Please help me land this.

By the way, should I request commit access?

https://github.com/llvm/llvm-project/pull/139560