assertion error on bzr get_next() called when there are no chars left

[dlebauer]

bzr 2.0.3 on python 2.4.3 on linux redhat

Just updating a file from emacs using M-x vv C-c C-c as usual, got the following error:

Traceback (most recent call last):
  File "/usr/lib64/python2.4/site-packages/bzrlib/commands.py", line 842, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib64/python2.4/site-packages/bzrlib/commands.py", line 1037, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib64/python2.4/site-packages/bzrlib/commands.py", line 654, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib64/python2.4/site-packages/bzrlib/commands.py", line 1052, in ignore_pipe
    result = func(*args, **kwargs)
  File "/usr/lib64/python2.4/site-packages/bzrlib/builtins.py", line 319, in run
    show_pending=(not no_pending), verbose=verbose)
  File "/usr/lib64/python2.4/site-packages/bzrlib/status.py", line 118, in show_tree_status
    want_unversioned=want_unversioned)
  File "/usr/lib64/python2.4/site-packages/bzrlib/tree.py", line 95, in changes_from
    want_unversioned=want_unversioned,
  File "/usr/lib64/python2.4/site-packages/bzrlib/decorators.py", line 138, in read_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib64/python2.4/site-packages/bzrlib/tree.py", line 977, in compare
    want_unversioned=want_unversioned)
  File "/usr/lib64/python2.4/site-packages/bzrlib/delta.py", line 230, in _compare_trees
    want_unversioned=want_unversioned):
  File "/usr/lib64/python2.4/site-packages/bzrlib/tree.py", line 103, in iter_changes
    extra_trees, require_versioned, want_unversioned=want_unversioned)
  File "/usr/lib64/python2.4/site-packages/bzrlib/workingtree_4.py", line 2070, in iter_changes
    state._read_dirblocks_if_needed()
  File "/usr/lib64/python2.4/site-packages/bzrlib/dirstate.py", line 2200, in _read_dirblocks_if_needed
    _read_dirblocks(self)
  File "_dirstate_helpers_pyx.pyx", line 767, in bzrlib._dirstate_helpers_pyx._read_dirblocks
  File "_dirstate_helpers_pyx.pyx", line 733, in bzrlib._dirstate_helpers_pyx.Reader._parse_dirblocks
  File "_dirstate_helpers_pyx.pyx", line 654, in bzrlib._dirstate_helpers_pyx.Reader._get_entry
  File "_dirstate_helpers_pyx.pyx", line 572, in bzrlib._dirstate_helpers_pyx.Reader.get_next_str
  File "_dirstate_helpers_pyx.pyx", line 554, in bzrlib._dirstate_helpers_pyx.Reader.get_next
AssertionError: get_next() called when there are no chars left

bzr 2.0.3 on python 2.4.3 (Linux-2.6.18-164.11.1.el5xen-x86_64-with-redhat-5.4-Tikanga)
arguments: ['/usr/bin/bzr', 'status']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'
plugins:
  launchpad /usr/lib64/python2.4/site-packages/bzrlib/plugins/launchpad [2.0.3]
  netrc_credential_store /usr/lib64/python2.4/site-packages/bzrlib/plugins/netrc_credential_store [2.0.3]

*** 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
    including this traceback and a description of the problem.

[John A Meinel (jameinel)]

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On 11/2/2010 5:53 PM, dlebauer wrote:
> Public bug reported:
>
> bzr 2.0.3 on python 2.4.3 on linux redhat
>
...

> File "_dirstate_helpers_pyx.pyx", line 554, in bzrlib._dirstate_helpers_pyx.Reader.get_next
> AssertionError: get_next() called when there are no chars left

This indicates a corrupted dirstate file. We expected there to be more
content (the end-of-content has not been reached), but there are no
bytes left.

Generally this means the file was truncated/corrupted by the filesystem.

The easiest way to fix it, is to check out into another location, and
then copy the .bzr/checkout/dirstate file over.

John
=:->

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[Vincent Ladeuil (vila)]

@dlebauer: Did the workaround recommended by John worked ?

We only rarely hear about this kind of failure so it's hard to diagnose, any weird event you can remember before this failure occurred ?

You're using a pretty old version: 2.0.3 was released 2009-12-14 and 2.0.6 is the latest release in the 2.0 series.
The current stable release is 2.2.1, I don't have a precise pointer but I'm pretty sure it has been packaged for redhat, so you should be able to upgrade.

[dlebauer (dlebauer)]

Sorry, ever since I uninstalled bzr explorer, I haven't had any issues
so I haven't tried the workaround. Just now, I reinstalled bzr
explorer to see if I could reproduce the error but I got stuck when I
attempted to open a branch on the redhat server, it gives me errors
related to a previous directory relocation using "mv" instead of "bzr
mv", e.g. when I try to open the new branch it says that the old
branch directory is not a branch.

I will be sure to report back if I can get this issue fixed and
recreate the error.

Thanks,

David

On Fri, Nov 12, 2010 at 5:47 AM, Vincent Ladeuil
<email address hidden> wrote:
> @dlebauer: Did the workaround recommended by John worked ?
>
> We only rarely hear about this kind of failure so it's hard to diagnose,
> any weird event you can remember before this failure occurred ?
>
> You're using a pretty old version: 2.0.3 was released 2009-12-14 and 2.0.6 is the latest release in the 2.0 series.
> The current stable release is 2.2.1, I don't have a precise pointer but I'm pretty sure it has been packaged for redhat, so you should be able to upgrade.
>
> --
> assertion error on bzr get_next() called when there are no chars left
> https://bugs.launchpad.net/bugs/670165
> You received this bug notification because you are a direct subscriber
> of the bug.
>

--
David LeBauer, PhD
Energy Biosciences Institute
University of Illinois Urbana-Champaign
1206 W. Gregory Drive
Urbana, IL  61801, U.S.A.