Created attachment 344629 [details]
Example repository

This could be intended behaviour, but I found it very confusing.

It appears that having a linear history where the order of timestamps doesn't match the topological order causes the graph view to display incorrectly. This could happen with interactive rebasing or with cherry-picking.

To reproduce:
1. Create a new repository and create 4 arbitrary commits (each on a different file to avoid conflicts during rebasing).
2. Do 'git rebase -i HEAD~3' and swap the order of commits 2 and 3, so that the history is now 1, 3, 2, 4.
3. Do 'git branch HEAD~1 mybranch' so that mybranch references commit 3.
4. Run 'gitg --all'.

The history appears as two separate streams (commits 2 and 4 in one stream, commits 1 and 3 in the other). I'll attach a screenshot. Running just gitg (without --all) shows the correct history, as does "show history in topological order".