You may find this patch useful:
- it fixes everything.world so ranger definition for trickedoutplayer does not cause segfault
- it eliminates this segfault in libstageplugin code (warning is printed instead)
- it re-enables create (roomba) robots in everything world (I know bumpers are not supported yet in Stage plugin, however, using stall field of position interface can be sufficient to implement simplest behaviors for these robots)
This patch is for github master.