Revisions disappeared on branch

[Michael Hudson]

Benjamin Jansen wrote:
> On Jan 20, 2009, at 7:39 AM, Benjamin Jansen wrote:
> 
>> We have a bzr branch that has about 350 revisions. Yesterday, we
>> noticed "bzr log" on our trunk branch now reports that it has only
>> three revisions: revnos 354, 355, 356. (r354 is the cutoff, previous
>> revisions don't show up.)
> 
> Replying to myself:
> 
> "bzr reconcile" seems to have fixed our branch. While running, it output
> "Fixing last revision info 3 => 356." That matches the problem we saw.
> 
> I still wonder what caused the branch's metadata to become incorrect.

I've heard that merging into an empty branch can cause this kind of
problem.  But I'd dearly like to know for sure, as we've had a very few
branches on Launchpad that suffer this problem...

Cheers,
mwh