[clang-tools-extra] [clang] [clang][AST] Fix crash in MatchChildASTVisitor::TraverseLambdaExpr (PR #70962)

[Piotr Zegar via cfe-commits]

PiotrZSL wrote:

Would be nice to simply not crash in such case, whatever someone will fix origin issue later is up to debate.
I would like to see this change on 17.0.6 (that means 2 weeks left to merge this).
Unless someone fixes this somewere in lower layers.


https://github.com/llvm/llvm-project/pull/70962