busy loop triggered in git grep -P

[Carlo Marcelo Arenas Belón]

The issue was reported[1] as a regression for git >= 2.35, because the workaround implemented for it broke with that release, but the issue is present in pcre < 10.36 (hence affecting the package in Ubuntu 20.04) and has been fixed by e0c6029[2].

Backporting the fix to the affected package (10.34-7) has been confirmed to solve the problem.

[1] https://<email address hidden>/
[2] https://github.com/PhilipHazel/pcre2/commit/e0c6029.patch