[clang] [Clang] Tolerate constant evaluation failure when transforming SubstNonTypeTemplateParmExpr in unevaluated contexts (PR #196791)

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wx257osn2 wrote:

@zyn0217 First, sorry for sending a PR without giving you a heads-up, even though the issue is assigned to you.

Regarding the fix itself, this patch seems to resolve the issue, but I'm a bit concerned that it may be too ad hoc. I’d appreciate your thoughts.

https://github.com/llvm/llvm-project/pull/196791