Too many arguments to function call, expected 0, have 3

Question

This compiles/works fine with Xcode 5, but causes a compile error with Xcode 6 Beta 4:

objc_msgSend(anItem.callback_object,
NSSelectorFrom         


        

Answer 1

This block of code reproduces the error:

- (void)reportSuccess:(void(^)(void))success
{
    success(what_is_this);
}

Guess where error is? Of course, what_is_this is not declared, but somehow magically it shows another error. In other words looks like if you have block, you can put any parameters when calling it, even non existent variables.