merge with no changes?

[Krzysztof Nowicki]

Parth Malwankar pisze:
> On Thu, Jun 25, 2009 at 8:59 PM, Neil Martinsen-Burrell<nmb at wartburg.edu> wrote:
>> Parth Malwankar wrote:
>>> While working on some branches which I merge frequently
>>> I observed that a merge happens even that there are no
>>> (visible?) changes.
>>>
>>> So for example, I could merge A->B and B->A forever
>>> as the merge _always_ happens. I was wondering if this
>>> is expected behavior or there is something I need to better
>>> understand here.
>> A merge creates a new revision whose parents are the tip of the current
>> branch and the tip of the other branch.  When you merge repeatedly like
>> this, you continue making new revisions with each commit which then need to
>> be merged to the other branch.  I believe the graph would look something
>> like this
>>
>> A   "Initial"
>> |\
>> B | "Added x"
>> |\|
>> | C "Merge from bar"
>> |/|
>> D | "Merge from foo"
>> |\|
>> | E "Merge from bar"
>>
>> and so on.  Using ``bzr qlog`` from the qbzr plugin should show you this
>> structure of revisions.
>>
>> -Neil
>>
> 
> Thanks Neil. Just tried the qbzr plugin. It does help visualize
> this better. I think I understand bzr behavior better now.
> 
> 

Hi,

A couple of months ago I asked the same question and one of the replies
contained a link to a bugreport, so I guess it's not considered a
desired behaviour.

https://bugs.launchpad.net/bzr/+bug/69489

Krzysztof