For Java, it's Resource leaks and Null dereferences
For C and Objective C, the list is
Resource leak
Memory leak
Null dereference
Parameter not null checked
Ivar not null checked
Premature nil termination argument
> At present, the analyzer reports problems caused by null pointer access and resource and memory leaks, which cause a large percentage of app crashes.
Did you mean you were looking for something more specific?