cappuccino/cappuccino — pull request #1914 by mrcarlberg (2013-04-23 11:16:03+00:00)
Title: CPExpression and CPPredicate can't handle nil as argument in method isEqual:

CPExpression and CPPredicate with subclasses will crash when nil is sent as argument to method isEqual:

I have added test cases and fixes for the problem. I have also added a test cases for CPObjects isEqual: method.