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<TITLE>Unhandled error in Deferred with twisted-8.2.0, but not with twisted-2.1.0</TITLE>
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<P><FONT SIZE=2 FACE="Arial">Am currently trying to upgrade to twisted-8.2.0. For some reason, twisted-8.2.0 thinks my deferred below was gc'd with an unhandled error, and tells me about it upon reactor exit. With python-2.4.2/twisted-2.1.0, no issues. With python-2.6.1/twisted-8.2.0, I see these issues. Any ideas why? Thanks.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">$ cat ./deferred-errors.py</FONT>
<BR><FONT SIZE=2 FACE="Arial">#!/usr/bin/env python</FONT>
<BR><FONT SIZE=2 FACE="Arial">import datetime, logging, os, random, re, shutil, socket</FONT>
<BR><FONT SIZE=2 FACE="Arial">import subprocess, sys, tempfile, threading, time, traceback</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">from twisted.internet import reactor</FONT>
<BR><FONT SIZE=2 FACE="Arial">from twisted.internet import defer</FONT>
<BR><FONT SIZE=2 FACE="Arial">from twisted.internet.utils import getProcessOutput</FONT>
<BR><FONT SIZE=2 FACE="Arial">from twisted.python import log</FONT>
<BR><FONT SIZE=2 FACE="Arial">import twisted</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">print 'twisted version is', twisted.__version__</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">def foo():</FONT>
<BR><FONT SIZE=2 FACE="Arial"> d = getProcessOutput('/bin/hostnameX')</FONT>
<BR><FONT SIZE=2 FACE="Arial"> def cb(result):</FONT>
<BR><FONT SIZE=2 FACE="Arial"> print 'cb: %s' % (result)</FONT>
<BR><FONT SIZE=2 FACE="Arial"> def eb(failure):</FONT>
<BR><FONT SIZE=2 FACE="Arial"> print 'eb caught the failure!'</FONT>
<BR><FONT SIZE=2 FACE="Arial"> d.addCallback(cb)</FONT>
<BR><FONT SIZE=2 FACE="Arial"> d.addErrback(eb)</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">reactor.callWhenRunning(foo)</FONT>
<BR><FONT SIZE=2 FACE="Arial">reactor.callLater(3, reactor.stop)</FONT>
<BR><FONT SIZE=2 FACE="Arial">reactor.run()</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">$ /sw/external/python-2.4.2/bin/python ./deferred-errors.py </FONT>
<BR><FONT SIZE=2 FACE="Arial">twisted version is 2.1.0</FONT>
<BR><FONT SIZE=2 FACE="Arial">eb caught the failure!</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">$ /sw/external/python-2.6.1/bin/python ./deferred-errors.py </FONT>
<BR><FONT SIZE=2 FACE="Arial">twisted version is 8.2.0</FONT>
<BR><FONT SIZE=2 FACE="Arial">eb caught the failure!</FONT>
<BR><FONT SIZE=2 FACE="Arial">Unhandled error in Deferred:</FONT>
<BR><FONT SIZE=2 FACE="Arial">Traceback (most recent call last):</FONT>
<BR><FONT SIZE=2 FACE="Arial">Failure: twisted.internet.error.ProcessTerminated: A process has ended with a probable error condition: process ended with exit code 1.</FONT></P>
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