Comment 5 for bug 505987

I can report that the issue is not unique to a branch of bzr-explorer. It also occurs with a branch whose parent is bzr+ssh://bazaar.launchpad.net/~vcs-imports/emacs/trunk/

I have also found an old branch of lp:bzr-explorer at r251 - this bug is NOT apparent when exploring that branch. [Note: only exploring the branch, not executing the code in it.] (But perhaps not suprisingly, reverting today's branch back to the same revision and then 'exploring' it does not remove the trigger of the error.)