[llvm] [SelectionDAG] Fix null pointer dereference in resolveDanglingDebugInfo (PR #174341)

[Nikita Popov via llvm-commits]

nikic wrote:

Can we just ... not test the crash on darwin? I don't understand why we're adding a crash test here in the first place, this is highly unusual.

The `x86_64-unknown-linux-gnu` test is sufficient to test the actual issue being fixed here.

https://github.com/llvm/llvm-project/pull/174341