Incorrect context within $on in AngularJS

I'm attempting to handle http errors within AngularJS (using ui-router), but am losing the context of my run function in the following code.

bugtracker.run(['$rootScope', '$state', function($rootScope, $state) {
    //at this point $state and $rootScope are defined
    $rootScope.$on('$stateChangeError', function(event, toState, toParams, fromState, fromParams, error) {
        //at this point $state and $rootScope are undefined
    });
}]);

The code that causes $stateChangeError to trigger is as follows.

//main.js
bugtracker.config(['$stateProvider', '$httpProvider', '$compileProvider', function($stateProvider, $httpProvider, $compileProvider) {
    //...
    $stateProvider.state('projects.show', {
        url: '/{projectId:[0-9]{1,8}}',
        templateUrl: '/assets/projects/show.html',
        controller: 'ProjectShowCtrl',
        resolve: bugtracker.controller('ProjectShowCtrl').resolve
    });
    //...
}]);

//ProjectShowCtrl.js
projectShowCtrl.resolve = {
    project: function(Project, $q, $stateParams, $state) {
        var deferred = $q.defer();
        Project.findById($stateParams.projectId, function(successData) {
            deferred.resolve(successData); 
        }, function(errorData) {
            deferred.reject(errorData); // you could optionally pass error data here
        });
        return deferred.promise;
    },
    delay: function($q, $timeout) {
        var delay = $q.defer();
        $timeout(delay.resolve, 1000);
        return delay.promise;
    }
};

I would like $state to be defined within the anonymous function called by the $on function so that I could redirect the user to a 401, 403, etc. page, but I'm unsure why it is not. In other examples I have seen (https://github.com/angular-ui/ui-router/issues/898) it is implied that $state is defined within the context of the anonymous function.

If anyone could explain why $state is not defined or what I can change to make it defined I would greatly appreciate it!