[llvm-branch-commits] [clang] [Serialization] Handle uninitialized type constraints (PR #113182)

[Florian Albrechtskirchinger via llvm-branch-commits]

falbrechtskirchinger wrote:

@zyn0217 @cor3ntin, please review. Thank you!

(@zyn0217 Note that this PR is targeting `release/19.x`. I've closed #110496 per Corentin's instruction.)

https://github.com/llvm/llvm-project/pull/113182