infer_clone/infer/documentation/issues/PREMATURE_NIL_TERMINATION_ARGUMENT.md

This error type is reported in C and Objective-C. In many variadic methods, nil is used to signify the end of the list of input objects. This is similar to nil-termination of C strings. If one of the arguments that is not the last argument to the method is nil as well, Infer reports an error because that may lead to unexpected behavior.

An example of such variadic methods is arrayWithObjects

  NSArray *foo = [NSArray arrayWithObjects: @"aaa", str, @"bbb", nil];

In this example, if str is nil then an array @[@"aaa"] of size 1 will be created, and not an array @[@"aaa", str, @"bbb"] of size 3 as expected.