Can't run go-5 nor build go[gccgo] because it segfaults all the times. See backtrace and info attached. If you need more info, ask.
Created attachment 474160 [details] info info
Created attachment 474162 [details] gdb.txt backtrace
Does it still happen on modern toolchain? Which command did you use to run it?
Let's declare it obsolete. If newer gcc version still fails please file a new bug.