arnold@skeeve.com wrote:
Paul Eggert <eggert@cs.ucla.edu> wrote:With recent 'grep' you can work around the problem by configuring --with-included-regex.Not so. I did a fresh ./boostrap ./configure --with-included-regex make and it still core dumps: $ echo abc | ./src/grep -E '(.*)(.*)(.*)\3\2\1' grep: regexec.c:1413: pop_fail_stack: Assertion `((Idx) (num) < ((Idx) -2))' failed. Aborted (core dumped) I looked at it in a debugger fs->num before the --fs->num executes looks to be -1.
Sorry, you're right. I got confused into thinking that grep Bug#22793 and grep Bug#21513 are the same bugs, but they're not. I have unmerged them.
This is still a glibc bug, not a grep bug; it's just that we don't have a fix. grep Bug#21513 is indeed fixed by configuring --with-included-regex.