infer_clone/infer/documentation/issues/IVAR_NOT_NULL_CHECKED.md

This error type is only reported in Objective-C. This is similar to Null dereference, but Infer hasn't found a whole trace where the error can happen, but only found that a null dereference can happen if an instance variable of a parameter is nil. For example:

  -(int) foo {
      B b* = [self->_a foo]; // sending a message with receiver nil returns nil
      return b->x; // dereferencing b, potential NPE if you pass nil as the argument a.
  }

Possible solutions are adding a check for nil, or making sure that the method is not called with nil.