Comment 4 for bug 501597

I just encountered the same bug on Windows XP SP3 using Bazaar 2.1.0b4 installed from the Win32 installer with the following plugins:

bzrtools 2.1.0b1
    Various useful commands for working with bzr.

explorer 0.10.0
    Version Control for Human Beings.

extmerge
    external merge plugin for bzr

launchpad 2.1.0b4
    Launchpad.net integration plugin for Bazaar.

netrc_credential_store 2.1.0b4
    Use ~/.netrc as a credential store for authentication.conf.

qbzr 0.17.0
    QBzr - Qt-based frontend for Bazaar

rebase 0.5.5
    Rebase support.

svn 1.0.1
    Support for Subversion branches

upload 1.0.0dev
    Upload a working tree, incrementally.

xmloutput 0.8.5
    This plugin provides xml output for status, log, annotate, missing, info,

Looking at the error in Visual Studio's debugger it appears to be an access violation caused by a null pointer. I don't have debugger symbols so I can't really pinpoint it any more than that.