$ printf '%s\n%s\n' '/((?(R)a|(?1)))*/' '' | pcretest PCRE version 8.33 2013-05-28 re> Neoprávněný přístup do paměti (SIGSEGV) This is fixed with upstream commit: commit fd411b0b71fc1d0bd1977d0a86e5711599f875d8 Author: ph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15> Date: Fri Aug 8 15:22:51 2014 +0000 Fix compile-time loop for recursive reference within a group with an indefinite repeat. git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1498 2f5784b3-3f2a-0410-8824-cb99058d5e15 Probably all Fedoras are affected (pcre-8.33-6.fc20.x86_64).
All Fedoras are affected.
Fixed as pcre-8.35-6.fc21 in F21.
This fix requires for F20 (pcre-8.33) larger changes including: commit 74d96caf6251eff2f6c6a3e879268ce2d2a6c9be Author: ph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15> Date: Fri Jul 5 10:38:37 2013 +0000 Implement PCRE_INFO_MATCH_EMPTY and fix 2 bugs concerned with scanning for empty string matching. git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1348 2f5784b3-3f2a-0410-8824-cb99058d5e15 which fixes some undefined behavior (including a crash) in case of "checking whether a group could match an empty string (which is used for indefinitely repeated groups to allow for breaking an infinite loop". Therefore this bug will no be fixed in F20 and F19.
*** Bug 1285401 has been marked as a duplicate of this bug. ***