ember.js: scheduleRevalidate in canary is causing test failures

Hello! travis-web has recently started failing to build on canary. One of the errors is this:

Promise rejected after visiting /builds/branches-tab: null is not an object (evaluating 'node.ownerNode.emberView.scheduleRevalidate')

Which looks to be from this line in ember-htmlbars/lib/utils/subscribe.js:

node.ownerNode.emberView.scheduleRevalidate(node, labelFor(stream));

Looking at the history of that file, I don’t see any reason why recent changes would have produced this failure, but I’m wholly unfamiliar with this code.

Hopefully this is a helpful error report and not just a red herring. Let me know if you need any more information or if maybe it’s a problem in travis-web.