https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93900
--- Comment #4 from Svante Signell <svante.signell at gmail dot com> --- Sorry, but there were two patches attached: one for libgo/go/internal/syscall/unix/nonblocking.go and one for libgo/go/internal/poll/fcntl_syscall.go >From the commit https://gcc.gnu.org/g:027a3f1c38727a1ea0969088b0680b2f6bb1e977 it seem like the second one was not applied.