https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115138
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> --- How do I reproduce this? I tried, on x86_64-linux an all-language bootstrap using gdc-13 for the first stage and that succeeded. I'm now trying again with gdc-12, just --enable-languages=d and an explicit --with-built-config=bootstrap-debug
