Cannot read property 'originalObject' of undefined

[binpur]

To reproduce:
I have no search history in the dropdown. I focus the input and press enter. I got this error from the console.

Uncaught TypeError: Cannot read property 'originalObject' of undefined
at Scope.angular.module.directive.scope.selectResult (angucomplete-alt.js:693)
at HTMLInputElement.keydownHandler (angucomplete-alt.js:358)
at HTMLInputElement.dispatch (jquery.js:4737)
at HTMLInputElement.elemData.handle (jquery.js:4549)
at HTMLInputElement.wrapped (raven.js:363)

I believe it's because scope.currentIndex is null and it goes into this condition.
if (scope.currentIndex >= 0 && scope.currentIndex < scope.results.length) {
event.preventDefault();
scope.selectResult(scope.results[scope.currentIndex]);
}