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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Tue, 24 Jul 2012 14:08:43 -0600
Subject: Re: Daemon loses __file__ reference after a while.
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On Tue, Jul 24, 2012 at 1:32 PM, Paul Rubin <no.email@nospam.invalid> wrote:
> Dieter Maurer <dieter@handshake.de> writes:
>> I have only one vague idea: should something try to terminate the
>> process, modules would start to lose their variables during shutdown.
>
> That happens all the time with multi-threaded programs, because the
> shutdown is happening concurrently with other threads doing stuff.  Are
> there threads in this particular program?

It also comes up in single-threaded programs that use finalizers
(__del__ methods).  At the time an object is finalized, many globals
might already be gone.