[tmp]% bzr init foo
Created a standalone tree (format: 2a)                                                               
[tmp]% cd foo
[foo]% echo hello > hello.txt
[foo]% bzr grep hello hello.txt
bzr: ERROR: bzrlib.errors.NoSuchRevision: CHKInventoryRepository('file:///home/parthm/tmp/foo/.bzr/repository/') has no revision null:

*** Bazaar has encountered an internal error.  This probably indicates a
    bug in Bazaar.  You can help us fix it by filing a bug report at
        https://bugs.launchpad.net/bzr/+filebug
    attaching the crash file
        /home/parthm/.cache/crash/bzr-20100301053333-3950.crash
    and including a description of the problem.

    The crash file is plain text and you can inspect or edit it to remove
    private information.
[foo]%