Interestingly, the bug depends on compiler behavior. If local
variables are automatically initialized to 0, then this always caused
the program to error out indicating a failure to parse the listen
port. Otherwise, the test was a no-op (except the rare case where the
memory happened to be zero anyways).
Thanks to Eugen Melnikoff for finding this.
The listen port should be opened before daemonizing otherwise if
opening the port fails, the user will get no feedback. The only
complication was that the listen socket needs to not be closed as part
of daemonizing.
Thanks to http://github.com/rickr for finding it.