[libcxx-commits] [libcxxabi] [libc++abi] Handle null pointer-to-object: Issue #64593 (PR #68076)

[Louis Dionne via libcxx-commits]

ldionne wrote:

Interesting. This actually highlights a blind spot we have in the expressiveness of our Lit features. We don't have a way to express "libc++ configured as Apple system library, targeting <target>, but using the tip-of-trunk version of the library". In other words, we generally assume that `apple-system` + `target=<XYZ>` implies that we are back-deploying (i.e. running against the system library that was shipped on `<XYZ>`). I'm not sure why that never bit us, but I suspect this is because these fixes are somewhat rare.

To avoid blocking you on this (which really has nothing to do with this patch), you could just use `UNSUPPORTED:` instead of `XFAIL`, that way the test just won't run in that configuration.

https://github.com/llvm/llvm-project/pull/68076