https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100305
--- Comment #13 from Gilles Gouaillardet <gilles.gouaillardet at gmail dot com> --- Thanks Richard for the quick fix. I am happy to confirm that the latest trunk passes the three reproducers included in this ticket. However, the latest gcc-11 branch only passes the mini reproducer you posted (and crashes with a similar stack trace with Andrew's reproducer and the one I trimmed from GROMACS) FWIW, I am still unable to build GROMACS 2021.1 with the latest trunk (both neon and SVE, now checking x86_64), but this is a different issue (looks like a C++ frontend issue, unless this is a legit error in the application).