https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65159
--- Comment #8 from David Krauss <potswa at mac dot com> --- It was an updated tree. I'm not sure what revision it was updated from, but it was probably late January. Sorry for the delay, my machine got completely hosed by a bad RAM chip. Took the filesystem with it. So, bit rot and disk corruption can't be ruled out either. Jonathan, what does the "confirmed" mean, were you able to reproduce it at all?