https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79122
--- Comment #3 from Alan <aconway at redhat dot com> --- I thought that might be the case but couldn't find a clear statement after a fair bit of googling. Is there a 'limitations of gccgo' doc somewhere that lists the unsupported features? You can close this from my perspective, unless you want to keep it to track the error message/documentation issues.