[clang] [Sema] Fix assertion in TreeTransform when rebuilding CXXParenListInitExpr (PR #203715)

[Corentin Jabot via cfe-commits]

cor3ntin wrote:

When this gets landed (there are unaddressed comments), please cherry pick to the 23 branch AND add a clang 23 release note. Thanks

https://github.com/llvm/llvm-project/pull/203715