https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85573
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- 7.3.1 will never be released, it's a post-7.3.0 and pre-7.4.0 development snapshot. If you are getting segfaults from snapshots now and you don't report them then the final release is likely to have the same segfaults.
