[Bug go/64001] gccgo: crash on stack splitting

[michael.hudson at canonical dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64001

--- Comment #4 from Michael Hudson-Doyle <michael.hudson at canonical dot com> ---
Well, it seems to report that __morestack_segments &
__morestack_current_segment are always NULL for all threads.  I don't
understand the morestack code perfectly, but this seems a bit unlikely to
actually be the case.

"GNU gdb (Ubuntu 7.8-1ubuntu4) 7.8.0.20141001-cvs" seems like it should be new
enough?