Don't try and use main::log, it doesn't exist. Use carp instead.

Don't try and use main::log, it doesn't exist.  Use carp instead.

It seems that if the child process has any problems whatsoever it continues
to run, returning from SafeExec and usurping control.  So everytime the
child has a problem, it usurps control, leaving the parent waiting.

After a while you get quite a few processes hanging around doing waitpids.