[clang] [Serialization] Handle uninitialized type constraints (PR #110496)

[Florian Albrechtskirchinger via cfe-commits]

falbrechtskirchinger wrote:

> So yes, this one is still necessary - it should occur with an assertion-enabled build when compiling a header containing an invalid concept decl.

Not in my testing.



https://github.com/llvm/llvm-project/pull/110496