https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97977
anlauf at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Known to fail| |11.0 Status|UNCONFIRMED |NEW Last reconfirmed| |2020-11-25 Ever confirmed|0 |1 --- Comment #1 from anlauf at gcc dot gnu.org --- Confirmed. The issue occurs when assigning to at least one of string1/string2 twice. When lifting the thread limit, I've also seen SIGSEGV.