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

[Iain Sandoe via libcxx-commits]

iains wrote:

update: 
so I've rebased and done the (clang-) reformatting where I actually touched the code (and, in fact, the two places are pretty much re-written, so it should not obfuscate).  With the revised impl. there are no changes to the interfaces.  

* split out the somewhat gratuitous reformatting of the initialisers to `__dynamic_cast_info` objects [TBH, the reformatted looks a lot less readable than the original] as a second patch because they do make the patch less readable.

* could not repeat the fail to `check-generated-output` that appeared on the last push (or really see exactly how it might relate to this patch).
* If I do:
`make -C build/runtimes/runtimes-bins libcxx-generate-files` there are no changed sources.


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