query: Try to invoke virtual method on a null object reference
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 67597
negative_passages.text: Can constructor return a null object?
negative_passages.docid: 114081
negative_passages.text: How can I pass a non final variable to an anonymous inner class?
negative_passages.docid: 89755
negative_passages.text: Why is "throw null" not creating a compilation error in Java?
negative_passages.docid: 69785
negative_passages.text: MethodInfo.Invoke with out Parameter
negative_passages.docid: 134746
negative_passages.text: Where do "pure virtual function call" crashes come from?
negative_passages.docid: 27460
negative_passages.text: Virtual functions
negative_passages.docid: 9683
negative_passages.text: How to use GetSObject to retrieve related data in a null safe manner?
negative_passages.docid: 144658
negative_passages.text: System.NullPointerException: Attempt to de-reference a null object ,sravn
negative_passages.docid: 58054
negative_passages.text: When is it OK to catch NullPointerException?
negative_passages.docid: 28348
negative_passages.text: How do I handle null or optional DLL struct parameters
negative_passages.docid: 39095
negative_passages.text: Is there any reason not to make a member function virtual?
negative_passages.docid: 2116
negative_passages.text: IllegalArgumentException or NullPointerException for a null parameter?
negative_passages.docid: 96843
negative_passages.text: What will happen when I call a member function on a NULL object pointer?
negative_passages.docid: 104501
negative_passages.text: How do I enforce null checking?
negative_passages.docid: 94683
negative_passages.text: Implement a pure virtual method in Objective-C
negative_passages.docid: 46857
negative_passages.text: Compiler warning: null reference exception