[clang] [Serialization] Check for stack exhaustion when reading declarations (PR #79875)

[via cfe-commits]

cor3ntin wrote:

I think we should apply @ChuanqiXu9 suggestion and merge that without tests. At worse it's harmless, at best it solves an actual issue for users. We have precedent for not being able to test resource exhaustion fixes.


https://github.com/llvm/llvm-project/pull/79875