https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123938
--- Comment #1 from Andrew Benson <abensonca at gcc dot gnu.org> --- This seems to have been caused by commit b405a04ffde07e9a3021b74a5d40c7938984b88f https://github.com/gcc-mirror/gcc/commit/b405a04ffde07e9a3021b74a5d40c7938984b88f
