https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86129
--- Comment #4 from Paul Sanders <p.sanders at alpinesoft dot co.uk> --- Sorry, that didn't happen on purpose. I edited the title, maybe that's what caused it, or maybe it's because someone (Martin?) changed the component from gcc to libstdc++. Anyway, I won't post anything further here (I probably shouldn't have posted that last one, but saying 'GIGO' is not a valid reason for ignoring this issue).