Cannot move a dev snapshot release from 'master' to the corresponding branch

Default branch change works fine, but there's no way to change release branch from master to 7.x-1.x
I get this on Imagecache profiles module dev release https://drupal.org/node/747432 following https://drupal.org/empty-git-master instructions to remove master branch

When I first saw the title of this issue in the queue I thought "Right, that's by design". But carefully reading the issue, you're actually talking about the edge-case where you've got releases pointing to 'master' that have a real version string (e.g. 7.x-1.x-dev) and wanting to move those to point to the corresponding named branch (7.x-1.x) once that branch exists.

Yes, there used to be special-case code in versioncontrol_release to make this possible. It was supposedly ported to D7, but probably never tested. This is a rare edge-case, so I'm not surprised it wasn't properly ported. Note that these releases only exist from before the Git migration. ;) It's no longer possible to create new releases pointing to 'master'.

Anyway, giving this a more accurate title so that it's more obvious what's actually going wrong. Technically, we should move this to the versioncontrol_project queue, since that's where versioncontrol_release lives which is where the code is that needs to be tested/fixed. However, there's some question as to what the issue workflow should be (#2129357: Suggestion to D7QA bug vetting process) so for now, I'll leave it in this queue.

Cheers,
-Derek

Attached patch I'll be adding to 7.x-1.x.

Added.

Now deployed on Drupal.org.