qemu-system-ppc -cpu G2leGP3 crashes

qemu crashes when running qemu-system-ppc -cpu G2leGP3 :

qemu-system-ppc -cpu G2leGP3
Error: Trying to register SPR 1013 (3f5) twice !

qemu-system-ppc -version
QEMU emulator version 2.0.50, Copyright (c) 2003-2008 Fabrice Bellard