Opera Clobbers Object.prototype with FunctionExpression? Wednesday, 3 October 2007

(function(){

propertyIsEnumerable = function(){ alert(123); };
( {} ).propertyIsEnumerable( "name" );
})();

In opera 9.2, both Mac and Windows, I get the alert.

This happens when adding a FunctionExpression property to the global object. The problem only happens when the property name corresponds to a native method.

Hopefully Futhark, Opera 9.5's new script engine that will replace linear_b, will address this problem.

Technorati Tags: JavaScript Opera Bugs FunctionExpression