Hi, Try out the following test case, IIRC found with the aid of afl-fuzz:
grep -E -f <( echo 'fzJ7fymOjgqOjgkfMnt/KSgfVzN8pFyQKR8zfGR7pGuQKR8zfCh8Mnt/KSgfVzN8pFyQKR8zfGR7pGuQKR8zfGR7kCkoCx8zfDJ7fymOrQmOjgkfM3wkXDI=' | base64 -d ) /dev/null grep: regexec.c:1375: pop_fail_stack: Assertion `num >= 0' failed. I reported it once as on Fedora's Bugzilla, but got no reaction - in that case it even triggered a segmentation fault. Cheers, d33tah
