xcode - 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,
NSSelectorFromString(anItem.selector), dict);

This is a 3rd-party component, so while I have the source code, it's not really my code and I'm hesitant to change it much (despite my personal opinion of 'wtf why are they using objc_msgSend??').

Image with possibly useful detail (error in error browser):

Answer 1

If you think having to do this is annoying and pointless you can disable the check in the build settings by setting 'Enable strict checking of objc_msgSend Calls' to no