$ echo 87654321 | \ grep -E -e '^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?).?\9\8\7\6\5\4\3\2\1$' Segmentation fault
Will work on a C reproducer soon.
$ echo 87654321 | \ .?)(.?) (.?)(.? )(.?)(. ?)(.?)( .?).?\9\ 8\7\6\5\ 4\3\2\1$ '
grep -E -e '^(.?)(
Segmentation fault
Will work on a C reproducer soon.