Backport upstream fix for potential PCRE cache deadlock - #9684

Backport upstream fix for potential PCRE cache deadlock#9684

mszabo-wikia wants to merge 1 commit into

facebook:masterfacebook/hhvm:masterfrom

mszabo-wikia:backport-upstream-pcre-cache-fixmszabo-wikia/hhvm:backport-upstream-pcre-cache-fixCopy head branch name to clipboard