[libcxx-commits] [libcxx] [libc++] Don't instantiate __split_buffer with an allocator reference (PR #171651)

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junov-google wrote:

> @junov-google Are you able to verify whether this indeed fixes your issue with Swift interop?

Confirmed.  I applied the change on top of my WIP tests for swift/C++ interop in the Chromium project, and I can confirm that this PR fixes the issue.  This probably also unblocks apple-llvm's next update.

https://github.com/llvm/llvm-project/pull/171651