Function name is missing when printing javascript function

Code such as:

function F(){}
console.log(F.toString())

Will output:

qml: function() { [code] }

How ever, this states that it needs FunctionDeclaration that includes Identifier, which seems to be missing in current output:
http://www.ecma-international.org/ecma-262/5.1/#sec-15.3.4.2