TypeError: Number.prototype.toString: 'this' is not a Number object
TypeError: RegExp.prototype.toString: 'this' is not a RegExp object
TypeError: Function.prototype.toString: 'this' is not a Function object
ReferenceError: Invalid left-hand side in assignment
ReferenceError: Invalid left-hand side in assignment
TypeError: Boolean.prototype.toString: 'this' is not a Boolean object
ReferenceError: Invalid left-hand side in assignment
TypeError: String.prototype.toString: 'this' is not a String object
TypeError: Date.prototype.toString: 'this' is not a Date object
TypeError: Boolean.prototype.valueOf: 'this' is not a Boolean object
TypeError: Date.prototype.valueOf: 'this' is not a Date object
TypeError: Number.prototype.valueOf: 'this' is not a Number object
ReferenceError: Invalid left-hand side in assignment
TypeError: String.prototype.valueOf: 'this' is not a String object