1.1.8.14. osx.cocoa.NilArg (ObjC)
Check for prohibited nil arguments to ObjC method calls.

caseInsensitiveCompare:
compare:
compare:options:
compare:options:range:
compare:options:range:locale:
componentsSeparatedByCharactersInSet:
initWithFormat:

Examples:

NSComparisonResult test(NSString *s) {
  NSString *aString = nil;
  return [s caseInsensitiveCompare:aString];
    // warn: argument to 'NSString' method
    // 'caseInsensitiveCompare:' cannot be nil
}