René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"create_patch=True breaks in some cases","articleBody":"`repo.index.diff(`HEAD`, create_patch=True)` will also break. However, it works without the `create_patch` flag. \n\nThe following two commands **succeed** as well.\n\nI have one staged file, one tracked but unstaged file, and some untracked files in my repository.\n\n```\nIn [13]: repo.index.diff(None)\nOut[13]: [\u003cgit.diff.Diff at 0x10d0eab18\u003e]\n\nIn [14]: repo.index.diff(None, create_patch=True)\nOut[14]: [\u003cgit.diff.Diff at 0x10d0eaaa0\u003e]\n```\n\n```\n\nIn [11]: repo.index.diff('HEAD~1', create_patch=True)\n---------------------------------------------------------------------------\nAttributeError                            Traceback (most recent call last)\n\u003cipython-input-11-49c4ff310661\u003e in \u003cmodule\u003e()\n----\u003e 1 repo.index.diff('HEAD~1', create_patch=True)\n\n/Library/Python/2.7/site-packages/git/index/util.pyc in check_default_index(self, *args, **kwargs)\n     62                 if self._file_path != self._index_path():\n     63                         raise AssertionError( \"Cannot call %r on indices that do not represent the default git index\" % func.__name__ )---\u003e 64                 return func(self, *args, **kwargs)\n     65         # END wrpaper method\n     66 /Library/Python/2.7/site-packages/git/index/base.pyc in diff(self, other, paths, create_patch, **kwargs)   1146                         cur_val = kwargs.get('R', False)   1147                         kwargs['R'] = not cur_val\n-\u003e 1148                         return other.diff(self.Index, paths, create_patch, **kwargs)\n   1149                 # END diff against other item handlin   1150\n/Library/Python/2.7/site-packages/git/diff.pyc in diff(self, other, paths, create_patch, **kwargs)\n     99                 if create_patch:\n    100                         diff_method = Diff._index_from_patch_format\n--\u003e 101                 index = diff_method(self.repo, proc.stdout)\n    102\n    103                 status = proc.wait()\n\n/Library/Python/2.7/site-packages/git/diff.pyc in _index_from_patch_format(cls, repo, stream)\n    299                         a_path, b_path, similarity_index, rename_from, rename_to, \\\n    300                                 old_mode, new_mode, new_file_mode, deleted_file_mode, \\\n--\u003e 301                                 a_blob_id, b_blob_id, b_mode = header.groups()\n    302                         new_file, deleted_file = bool(new_file_mode), bool(deleted_file_mode)\n    303\n\nAttributeError: 'NoneType' object has no attribute 'groups'\n```\n","author":{"url":"https://github.com/louisrli","@type":"Person","name":"louisrli"},"datePublished":"2013-06-30T14:14:12.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/113/GitPython/issues/113"}