three.js: THREE.AnimationAction: this._mixer is undefined

Description of the problem

Calling a reference to an THREE.AnimationAction fails with TypeError: this._mixer is undefined.

Im loading a json model, setting up the animations and some time later i want to play the animations. Im attaching the AnimationActions to my Object so i can play them later via myObject.playMe();. This fails with a type error, while wrapping it inside an anonymous function works:

function MyClass() {
    //...
    this.playMe1 = mixer.clipAction( mesh.geometry.animations[ 1 ] ).play; 
    this.playMe2 = function() { mixer.clipAction( mesh.geometry.animations[ 1 ] ).play() };
}

var myObjet = new MyClass();
myObject.playMe1(); // TypeError: this._mixer is undefined
myObject.playMe2(); // works

Three.js version

• Dev
• r82