runtime: fix potential GC deadlock The issue seems to not be triggered right now, but I've seen the deadlock after some other legal modifications to runtime. So I think we are safer this way.
runtime: fix potential GC deadlock
The issue seems to not be triggered right now,
but I've seen the deadlock after some other legal
modifications to runtime.
So I think we are safer this way.

R=rsc, r
CC=golang-dev
http://codereview.appspot.com/6339051
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go