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Disable PHP config option "pcre.jit" to work around PCRE segfault after "fork()"

Authored by epriestley on May 23 2019, 11:36 PM.



Ref T13296. On macOS with PHP 7.3.x, PCRE can segfault during calls to "preg_match()" or during process shutdown.

Disabling "pcre.jit" appears to work around this issue. Some casual Googling suggests that the JIT does not dramatically improve performance (~10%?) and we aren't PCRE-bound anyway, so prefer "not crashing" over "questionable performance improvements" on all systems for now.

Test Plan
  • See T13296 for details.
  • Ran bin/phd start on macOS with PHP 7.3.1.
  • Before patch: daemons don't actually start.
  • After patch: daemons start.

Diff Detail

rPHU libphutil
Automatic diff as part of commit; lint not applicable.
Automatic diff as part of commit; unit tests not applicable.