Christoff, I just noticed I wasn't really answering the real problem you report, which is the crash.
I believe the problem is in your code: You create two vectors of value-types (cars and factories). Then you take references to the stored objects, while there is no guarantee that the objects' addresses won't change over time. In particular, there is a good chance of these objects to be copied as the vector gets resized as new objects are added beyond their current capacity. As a test, I called vector<...>::reserve(32) on each of the vectors right in the Factory and Manufacturer constructors, with the effect of allocating enough storage upfront so that in your sample code no re-allocation is required, and thus objects won't be copied around. This prevents the crash from happening for me. Obviously this is just to illustrate the problem; it's definitely not a solution to your problem, which still is that you reference objects beyond their lifetime. HTH, Stefan -- ...ich hab' noch einen Koffer in Berlin... _______________________________________________ Cplusplus-sig mailing list Cplusplus-sig@python.org https://mail.python.org/mailman/listinfo/cplusplus-sig