I get a crash with the following savegame (passenger-and-mail-classes branch):
http://simutrans-germany.com/files/upload/classes_GUI_vehicle_tests.sve (http://simutrans-germany.com/files/upload/classes_GUI_vehicle_tests.sve)
* Immediatedly pause the game when it is loaded,
* Locate the train "(32) BR Class 365 "Networker Express" EMU", which is just about to enter the "Petwater Ponds Town Hall Railway Station" in the western end of the map.
* Press play again and when the train arrives to the station, the game will crash.
Thank you for the report. I think that I have managed to fix this now. Would you be able to re-test?