repository sync failing with cached git repository which has a file started with colon character

[Jun Omae]

This issue is initially reported in ​gdiscussion:trac-users:FnOqc5nUlWg.

$ cd /var/git/testing.git
$ git log --name-status
commit baa7ee95a075cfd0a4de55bc4fe2ed599ed19109
Author: Jun Omae <jun66j5@gmail.com>
Date:   Wed Apr 5 19:13:02 2017 +0900

    testing...

A       0-file.txt
A       :-file.txt
A       a-file.txt

$ /venv/trac/1.0.13/bin/trac-admin /var/trac/1.0-sqlite
Trac [/var/trac/1.0-sqlite]> repository add '' /var/git/testing.git git
...
Trac [/var/trac/1.0-sqlite]> repository sync ''
...
2017-04-05 19:24:15,746 Trac[util] DEBUG: prefetch: 0 rows
IndexError: list index out of range
2017-04-05 19:24:15,747 Trac[console] ERROR: Exception in trac-admin command: u"repository sync ''"
Traceback (most recent call last):
  File "/venv/trac/1.0.13/lib/python2.5/site-packages/trac/admin/console.py", line 110, in onecmd
    rv = cmd.Cmd.onecmd(self, line) or 0
  File "/usr/lib/python2.5/cmd.py", line 218, in onecmd
    return self.default(line)
  File "/venv/trac/1.0.13/lib/python2.5/site-packages/trac/admin/console.py", line 289, in default
    return self.cmd_mgr.execute_command(*args)
  File "/venv/trac/1.0.13/lib/python2.5/site-packages/trac/admin/api.py", line 127, in execute_command
    return f(*fargs)
  File "/venv/trac/1.0.13/lib/python2.5/site-packages/trac/versioncontrol/admin.py", line 159, in _do_sync
    self._sync(reponame, rev, clean=False)
  File "/venv/trac/1.0.13/lib/python2.5/site-packages/trac/versioncontrol/admin.py", line 143, in _sync
    repos.sync(self._sync_feedback, clean=clean)
  File "/venv/trac/1.0.13/lib/python2.5/site-packages/tracopt/versioncontrol/git/git_fs.py", line 141, in sync
    self._insert_changeset(db, rev, cset)
  File "/venv/trac/1.0.13/lib/python2.5/site-packages/trac/versioncontrol/cache.py", line 285, in _insert_changeset
    for path, kind, action, bpath, brev in cset.get_changes():
  File "/venv/trac/1.0.13/lib/python2.5/site-packages/tracopt/versioncontrol/git/git_fs.py", line 852, in get_changes
    self.repos.git.diff_tree(parent, self.rev, find_renames=True):
  File "/venv/trac/1.0.13/lib/python2.5/site-packages/tracopt/versioncontrol/git/PyGIT.py", line 1054, in diff_tree
    yield __chg_tuple()
  File "/venv/trac/1.0.13/lib/python2.5/site-packages/tracopt/versioncontrol/git/PyGIT.py", line 1045, in __chg_tuple
    chg[6] = self._fs_to_unicode(chg[6])
IndexError: list index out of range

[Jun Omae]

Proposed changes in [92f7469f1/jomae.git] (jomae.git@t12758+1.0).

For 1.2-stable, the changes will be merged after replacing iterate.next() with next(iterate).

[Jun Omae]

Fixed in [15759] and merged in [15760-15761].