For all I can tell, darcs get --context got horribly broken with NewSet. 
There's a regression test for it though, that does not notice any 
problem, so that probably needs extending. In issue1860, Eric created a 
"seven-ctx" -- if I use it on darcs get of the darcs darcs repo, I get a 
result that has about 9 patches in it. Specifically, it is missing the 
2.2 tag and everything that it depends on.

The --context code works by producing a PatchSet from the context file 
and then using findCommonWithThem to get a list of uncommon patches, 
which are then unpulled. In this case, *most* of the current repository 
ends up in the "only_ours" part and is therefore unpulled. Probably due 
to a failure to move the tag into the common part.

Just making a note that we need to extend the get context test as Petr
suggests.

Hi Petr, thanks for the test!  

Could you break your 'Extend the get test to cover --context interaction
with tags.' into a separate failing-issue1865-get-context.sh?  (unless
you have a better idea on how to deal with this, because such work would
involve some duplication in the test case code :-/)

My staging repo nicely reminded me that the get.sh test fails...

Eric Kow <bugs@darcs.net> writes:

> Could you break your 'Extend the get test to cover --context interaction
> with tags.' into a separate failing-issue1865-get-context.sh?  (unless
> you have a better idea on how to deal with this, because such work would
> involve some duplication in the test case code :-/)
>
> My staging repo nicely reminded me that the get.sh test fails...

I have pushed an amended version of the patch (that both extends get.sh
slightly and adds a failing-issue1865... test).

Yours,
   Petr.

Thanks.  It looks like Petr has already diagnosed the problem in
msg11266, and now that we have a formal test for it, we only need
implementation.

The following patch updated issue issue1865 with status=resolved;resolvedin=2.6.0 HEAD

* Resolve issue1865: make scanBundle produce a well-formed PatchSet. 
Ignore-this: d25580a6ed72fa218b63b947838a8a1a

When a context files ends in a tag, this has to be a clean tag, so we break it
out into a separate (empty) Tagged, which makes with_partial_intersection work
correctly on the result.