Angular httpBackend crashing browser

When using Jasmine and Angular (1.4.7) with Restangular (1.4.0), httpBackend and angular-mocks (1.4.7), Chrome and PhantomJS both crash when encountering the following line:

httpBackend.whenGET('/something').respond(200);

If I get rid of it entirely, as below, I get the following error:

//httpBackend.whenGET('/something').respond(200);
scope.doSomething();  // will invoke a GET to /keepAlive
httpBackend.expectGET("/something").respond(200);
httpBackend.flush();

Error: Unexpected request: GET /something No more request expected

The code that it is testing is:

$scope.doSomething = function () {
    Restangular.one('something').get();
};

I've tried everything I can think of. I'm down to the idea that this is just a bug in Karma/Jasmine/Restangular but I don't know how to work around it.

One thing worth noting is that httpBackend and Restangular disagree about the URL. Restangular adds the / to /something. httpBackend doesn't. This is why they don't match.