Github user adufilie commented on the pull request: https://github.com/apache/flex-falcon/pull/5#issuecomment-169110068 Object.prototype.toString() is included in the es3.js extern file, but it has a different signature than Number.prototype.toString(opt_radix), so you cannot have it defined in Object.as and override in Number.as or any other file. The original code had it working for Number/int/uint, but "new Date().toString()" was giving an error because it was not including the toString() function in the Date class. "new Object().toString()" does not giving an error because Object uses the 'dynamic' keyword on the class definition. One of the problems in createjs was that Filter.js documented toString() with @return {string} but ColorFilter (extends Filter) did not include a return type, so it became a void function and an incompatible override. The other issue was that there was a hard-coded thing in MethodReference.java to output an "AS3" namespace for a toString() override.
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