Kevin Ushey <kevinushey@xxxxxxxxx> writes:
> Thanks for the quick response! I wonder if this issue could be macOS-specific?
Ah, yes, I somehow thought you mentioned Ubuntu and totally blocked
that macOS issue out of my mind, but I do recall that it has been
reported that build with macOS native regexp library is broken a few
times recently on this list.
https://lore.kernel.org/git/?q=macOS+regexp
finds this thread, which unfortunately was mistitled to make them
sound as if they were about "-P", but the issue in the thread was
about extended regexp.
https://lore.kernel.org/git/03fd7ddb-8241-1a0a-3e82-d8083e4ce0f7@xxxxxx/
