https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79430
--- Comment #68 from Thomas Koenig <tkoenig at gcc dot gnu.org> --- Created attachment 41247 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41247&action=edit Patch to be able to run the test case With this patch on top of the relevant version, it is actually possible to check for the bug of interest. I have narrowed it down to somewhere r244794 and r244993. Bisection is continuing.