[PATCH] posix: fix false regex match with backrefs and $ anchor

[Paul Eggert]

On 2026-04-13 10:40, Florian Weimer wrote:
> Wouldn't it make sense to call check_halt_state_context only once?

Yes it would, and thanks. I installed the attached into Gnulib, and we 
should propagate this into glibc when we propagate the other fixes.
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