Router error substate promise rejection results in redirect.

[nathanhammond]

Versions: Occurs in 1.4, 1.5, and 1.6
Reduction: http://emberjs.jsbin.com/qudek/2/edit

Test Procedure:

1. Click the link to "slow error"
2. Before the timeout triggers (3 seconds) click "blue"
3. Note that the error substate replaces the "blue" route.

I feel like we're missing a transition.abort(); somewhere.

@machty

[ef4]

This has bitten me too now. In my case the only "error" is a redirect that causes TransitionAborted. The redirect happens and even flashes on screen briefly, but then we transition to the error route anyway.

[ef4]

I bisected the bug, it was introduced in 808419c, @machty's query params rewrite. Which doesn't narrow it down much, because that's a pretty big patch.