https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82043 --- Comment #1 from Ian Lance Taylor <ian at airs dot com> --- This can't be GCC 7 branch, because files like libgo/go/runtime/heapdump.go and libgo/go/runtime/os_aix.go don't exist in GCC 7 branch. They only exist on trunk.