BlackBerry Crashes on Ti.App.addEventListener() or an Assignemnt to Prototype.

Hi, i can't fogure out, why my Blackberry app crashes. There are 2 snippets of code that lead to crash of the app. (i tested it in an empty app just after creating new mobile project)

Application type: mobile
Titanium SDK:  3.5.0.GA
Platform & version: Blackberry 10
Device: BlackBerry Simulator 10 and BlackBerry 10
Host Operating System: Windows 7
Titanium Studio: build: 3.4.1.201410281727


a simple test case: 

//the following function call leads to crash of the app.(callback can be an empty function, 
    //it doesn't change anything)
 
     Ti.App.addEventListener("event", function(e){
        alert("in listener"); }
     );
 
    // this code also leads to crash.
    // deletion of  "Function.prototype.derive = " solves the problem. but if i call the function later, 
    // the app crashes anyway.. because there are other assignments to prototype in it. 
 
    Function.prototype.derive = function( parentClassOrObject ){ 
        if ( parentClassOrObject.constructor == Function ) 
        { 
            //Normal Inheritance 
            this.prototype = new parentClassOrObject;
            this.prototype.constructor = this;
            this.prototype._super = parentClassOrObject.prototype;
        } 
        else { 
            //Pure Virtual Inheritance 
            this.prototype = parentClassOrObject;
            this.prototype.constructor = this;
            this.prototype._super = parentClassOrObject;
        } 
        return this;
    }

As i detected, any assignment of any (f.i. empty one) function to prototype's attributes lead to a crash.

Any help will be appreciated. Thanks in advance!