Comment 3 for bug 562380

This is pretty serious. I'm tempted to mark it Critical.

It seems to be pretty easy to reproduce some serious misbehaviour:

$ bzr branch lp:~toshio/bzr-gtk/handle-patch-fix
Doing on-the-fly conversion from <RepositoryFormat2a> to (remote).
This may take some time. Upgrade the repositories to the same format for better performance.
Branched 667 revision(s).
Transferred: 2882kB (50.9kB/s r:2880kB w:2kB)
$ bzr check
[CRASH: XML SyntaxError in read_revision_from_string]
$ bzr upgrade
[ditto]

The problem appears to be that lp:bzr-gtk is 2a, and ~toshio/bzr-gtk/handle-dirty-patches is 1.9-rich-root, but stacked on that 2a branch. Fetching handle-dirty-patches retrieves 1.9-rich-root, but apparently has broken data. So probably this bug involves stacking?

I'm not sure yet when the corruption is first introduced. Maybe by the LP upgrade?