KeyError from self.myReferenceByCLID[clid]

[Zooko]

I don't know if this is normal or is indicative of a problem. This is from running some unit tests in tahoe-lafs.

local#4813 09:57:13.711: deep-check done
local#4814 09:57:13.725: shutting down SystemTest services
local#4815 09:57:13.726: Node.stopService
local#4816 09:57:13.728: Node._really_stopService
local#4817 09:57:13.774: Node.stopService
local#4818 09:57:13.777: Node._really_stopService
local#4819 09:57:13.825: Node.stopService
local#4820 09:57:13.828: Node._really_stopService
local#4821 09:57:13.871: Node.stopService
local#4822 09:57:13.873: Node._really_stopService
local#4823 09:57:13.916: Node.stopService
local#4824 09:57:13.918: Node._really_stopService
local#4825 09:57:13.969: Node.stopService
local#4826 09:57:13.972: Node._really_stopService
local#4827 09:57:14.053: an inbound callRemote that we [bduf] executed (on behalf of someone else, TubID ncie) failed
local#4828 09:57:14.053:  reqID=248, rref=<foolscap.broker.Broker object at 0x39653b0>, methname=RIBroker.decref
local#4829 09:57:14.053:  args=[]
local#4830 09:57:14.053:  kwargs={'count': 1, 'clid': 29}
local#4831 09:57:14.053:  the LOCAL failure was:
 FAILURE:
 [CopiedFailure instance: Traceback from remote host -- Traceback (most recent call last):
   File "/usr/local/stow/python-release25-maint-2008-12-23/lib/python2.5/site-packages/foolscap-0.3.2-py2.5.egg/foolscap/eventual.py", line 26, in _turn
     cb(*args, **kwargs)
   File "/usr/local/stow/python-release25-maint-2008-12-23/lib/python2.5/site-packages/foolscap-0.3.2-py2.5.egg/foolscap/broker.py", line 536, in doNextCall
     d.addCallback(lambda res: self._doCall(delivery))
   File "/usr/local/stow/python-release25-maint-2008-12-23/lib/python2.5/site-packages/Twisted-8.1.0_r25700-py2.5-macosx-10.3-i386.egg/twisted/internet/defer.py", line 195, in 
addCallback
     callbackKeywords=kw)
   File "/usr/local/stow/python-release25-maint-2008-12-23/lib/pytho
 
 -- TRACEBACK ELIDED --
 
 /twisted/internet/defer.py", line 186, in addCallbacks
     self._runCallbacks()
 --- <exception caught here> ---
   File "/usr/local/stow/python-release25-maint-2008-12-23/lib/python2.5/site-packages/Twisted-8.1.0_r25700-py2.5-macosx-10.3-i386.egg/twisted/internet/defer.py", line 328, in 
_runCallbacks
     self.result = callback(self.result, *args, **kw)
   File "/usr/local/stow/python-release25-maint-2008-12-23/lib/python2.5/site-packages/foolscap-0.3.2-py2.5.egg/foolscap/broker.py", line 536, in <lambda>
     d.addCallback(lambda res: self._doCall(delivery))
   File "/usr/local/stow/python-release25-maint-2008-12-23/lib/python2.5/site-packages/foolscap-0.3.2-py2.5.egg/foolscap/broker.py", line 571, in _doCall
     return obj.doRemoteCall(delivery.methodname, args, kwargs)
   File "/usr/local/stow/python-release25-maint-2008-12-23/lib/python2.5/site-packages/foolscap-0.3.2-py2.5.egg/foolscap/referenceable.py", line 59, in doRemoteCall
     res = meth(*args, **kwargs)
   File "/usr/local/stow/python-release25-maint-2008-12-23/lib/python2.5/site-packages/foolscap-0.3.2-py2.5.egg/foolscap/broker.py", line 421, in remote_decref
     tracker = self.myReferenceByCLID[clid]
 exceptions.KeyError: 29
 ]