switch doesn't find sibling branches when colocated

[Aaron Bentley]

abentley@speedy:~/sandbox$ bzr init colocated
Created a standalone tree (format: 2a)
abentley@speedy:~/sandbox$ bzr switch -d colocated/ -b one
Tree is up to date at revision 0.
Switched to branch: /home/abentley/sandbox/colocated/
abentley@speedy:~/sandbox$ bzr switch -d colocated/ -b two
Tree is up to date at revision 0.
Switched to branch: /home/abentley/sandbox/colocated/
abentley@speedy:~/sandbox$ bzr checkout colocated checkout --lightweight
abentley@speedy:~/sandbox$ cd checkout
abentley@speedy:~/sandbox/checkout$ bzr switch one
bzr: ERROR: Not a branch: "/home/abentley/sandbox/colocated/one/".

[Jelmer Vernooij (jelmer)]

Like 'bzr branches', bzr switch looks at sibling branches of the current branch, not of the current working tree.

I think this is reasonable. Is there a particular reason why you would want to switch from a lightweight checkout of something else into a branch that is colocated there?

[Aaron Bentley (abentley)]

AFAICT, switch is looking at siblings of either the current working tree or of the branch reference. Instead, I think it should look at siblings of the referenced branch.

In my example, "checkout" is a checkout of "two", which has "one" as a sibling. But I can't switch to "one" by running "bzr switch one".