Related discussion from when this crash was originally found in screen and then they found a slightly modified version also worked on xterm (I can't find any nontrivial discussion of it on HN, surprisingly, but I had this article's link in my browser history from a month ago because of it): https://lists.gnu.org/archive/html/screen-devel/2021-02/msg0... (and then https://www.openwall.com/lists/oss-security/2021/02/09/7 )

It includes examples that work for crashing, so if you're browsing HN on links for some reason, I wouldn't go reading it.