burke/zeus — pull request #8 by stefanpenner (2012-07-29 23:16:17+00:00)
Title: Intermitted WINCH is sent before we have a pid.

Lukcily nil does not coerce to 4 in this context. Instead we simply get
an error.

The included "fix" obviously prevents the crash in question, but does
indicate an underlying issue. Which will need further investigation.