re2c before 2.0 has uncontrolled recursion that causes stack consumption in find_fixed_tags.Referenceshttps://github.com/skvadrik/re2c/issues/219https://www.openwall.com/lists/oss-security/2020/04/27/2http://www.openwall.com/lists/oss-security/2020/05/14/4
