Core dumps

If a core dump happens, it could mean one of the following:

• A pointer is NULL and has been de-referenced (that is, is being used as if it were non-NULL)
• An object has been deleted twice
• A pointer is being used that points to an object that has been deleted
• An object is being treated as something it isn’t (for example, an object has been cast incorrectly to the wrong type of object)