https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116561
--- Comment #2 from Sam James <sjames at gcc dot gnu.org> --- (In reply to Thomas Schwinge from comment #1) > This appears to be due to recent commit > r15-3328-g673a448aa24efedd5ac140ebf7bfe652d7a6a846 "Optimize initialization > of small padded objects". > > Given this commit doesn't appear to be causing any other issues, chances are > that the Rust front end is doing "something funny"? It seems to have started passing yesterday or so, probably after r15-5772-gf93059c82e61d6.