Comment 1 by jessta:

I notice that you're ignoring the returned error values from 
net.Listen()
listen.Accept()
net.Dial()
it's possible you're getting a nil back from these functions due to an error and then 
attempting to access that nil causing the seg fault.

Comment 2 by thevulgarprogrammer:

I'm skipping the error checks in the snippet i showed to make it shorter, but that is
not the issue. You can check a longer version of the code here:
https://gist.github.com/e1c8c3f80050f6f4e76b/0481df04c2438cdce2108aaa84d813b817b7c3ba
where I do check the error values.
Also, if you remove line #9 ( go func() {) and the corresponding closing curly
bracket, everything works fine. This leads me to believe that there is some kind of
problem with the closure not retaining the "listen" variable.

Comment 3:

This is a compiler bug.  You can work around the
bug by using
   listen, _ := ...
instead of
   var listen, _ = ...

Labels changed: added compilerbug.

Owner changed to r...@golang.org.

Status changed to Accepted.

Comment 4 by thevulgarprogrammer:

I guess I found it since I prefer the var listen, err = ... syntax over listen, err :=
... syntax.

Comment 5:

This issue was closed by revision e0059ae.

Status changed to Fixed.

Merged into issue #-.