Commit 70b673eb768eb7288639cbbe4642c2912b7d204e
2021-02-05T17:08:10
regex: fix longstanding backref match bug This fixes a longstanding glibc bug concerning backreferences <https://sourceware.org/11053> (2009-12-04). * lib/regexec.c (proceed_next_node, push_fail_stack) (pop_fail_stack): Push and pop the previous registers as well as the current ones. All callers changed. (set_regs): Also pop if CUR_NODE has already been checked, so that it does not get added as a duplicate set entry. (update_regs): Fix comment location. * tests/test-regex.c (tests): New constant. (bug_regex11): New test function. (main): Bump alarm value. Call new test function.