[stravant]

Such an invalid access of a very small address probably does result from a nullptr error:

    struct BigObject {
        char stuff[0x9c]; // random fields
        int field;
    }
    BigObject* object = nullptr;
    printf("%d", object->field);

That will result in "Attempt to read from address 0x9c". Just because it's not trying to read from literal address 0x0 doesn't mean it's not nullptr error.