Error: An invalid or illegal string was specified

Hello,

My Controller looks like this:

```
mApp.controller('LoginController', ['$scope', 'UserResource', function($scope, UserResource) {
$scope.submit = function(user) {
console.log(user);

UserResource.login({
"username" : user.name,
"password": user.pass
}).then(
// Login success.
function(data) {
console.log('user login success');
},
// Login error.
function(data) {
console.log('user login error');
}
);
};
}]);
```

It shows the following error:

```
Error: An invalid or illegal string was specified
fg/<@http://localhost:8000/android/www/assets/lib/angular.min.js:102:169
n@http://localhost:8000/android/www/assets/lib/angular.min.js:98:460
m/g<@http://localhost:8000/android/www/assets/lib/angular.min.js:95:489
e/<@http://localhost:8000/android/www/assets/lib/angular.min.js:130:409
uf/this.$get

Start with the LoginController snippet and the UserResource.login call, then reproduce the error using the reported AngularJS stack trace in angular.min.js. Done means identifying the cause of the invalid string and documenting or applying a verified fix for the login request.

Written by the indexing model from the issue text.