Dear boost users, I have a very strange segmentation fault in lagged fibonacci and unfortunately, I was not able to reduce the problem to a simple example yet. I know that stinks of the problem coming from my code but please bear with me for a moment. I have two classes that both use the same other class for some random number generation. The two classes differ only in one unrelated function. If I run my program with one class everything works just fine, if I run it with the other after a few iterations the error occurs. I have no idea why, since they both use the exact same class from which the error occurs. I use the following code to get my generators: typedef boost::uniform_smallint<short unsigned> Small; typedef boost::variate_generator<rfn::RandGen&, Small> Small_Number; Small* _us_dist = new Small(1, 20); Small_Number* _len_gen = new Small_Number(rfn::Mutation::_parameters->rng(), *_us_dist); Where rfn::Mutation::_parameters->rng() gives me a reference from a lagged_fibonacci object held in that class. I then try to get a number in the following way: short unsigned length = (*_len_gen)(); I have attached a gdb run of the program crashing. If you have any ideas where I can look for this error please tell me. It's also no problem for me to send you the complete sources but it's a rather big project. Thank you for your help, Moritz