Infinite loop in objc_msg_lookup_sender

[Tom Davie]

Hey all,

Having managed to get libobjc2 trunk installed, I'm now unfortunately hitting 
an infinite recursion in the runtime:

gdb sayeth:

#92231 … repeats ad-infinatum, decrementing the receiver pointer by 0x110 every 
iteration.
#92232 0x00007ffff6a810d2 in objc_msg_lookup_internal (receiver=0x7fffffff7d80, 
selector=0x7ffff7b86f30, sender=0x0) at sendmsg2.c:96
#92233 0x00007ffff6a80ea8 in objc_msg_lookup_sender (receiver=0x7fffffff7d80, 
selector=0x7ffff7b86f30, sender=0x0) at sendmsg2.c:171
#92234 0x00007ffff77347be in gs_objc_proxy_lookup (receiver=0x2b4d9b8, 
op=0x7ffff7b86f30) at GSFFIInvocation.m:276
#92235 0x00007ffff6a810d2 in objc_msg_lookup_internal (receiver=0x7fffffff7e90, 
selector=0x7ffff7b86f30, sender=0x0) at sendmsg2.c:96
#92236 0x00007ffff6a80ea8 in objc_msg_lookup_sender (receiver=0x7fffffff7e90, 
selector=0x7ffff7b86f30, sender=0x0) at sendmsg2.c:171
#92237 0x00007ffff77347be in gs_objc_proxy_lookup (receiver=0x2b4d9b8, 
op=0x7ffff7b86f30) at GSFFIInvocation.m:276
#92238 0x00007ffff6a810d2 in objc_msg_lookup_internal (receiver=0x7fffffff7fa0, 
selector=0x7ffff7b86f30, sender=0x0) at sendmsg2.c:96
#92239 0x00007ffff6a80ea8 in objc_msg_lookup_sender (receiver=0x7fffffff7fa0, 
selector=0x7ffff7b86f30, sender=0x0) at sendmsg2.c:171
#92240 0x00007ffff77347be in gs_objc_proxy_lookup (receiver=0x2b4d9b8, 
op=0xa68660) at GSFFIInvocation.m:276
#92241 0x00007ffff6a810d2 in objc_msg_lookup_internal (receiver=0x7fffffff8550, 
selector=0xa68660, sender=0x2b4d9b8) at sendmsg2.c:96
#92242 0x00007ffff6a80ea8 in objc_msg_lookup_sender (receiver=0x7fffffff8550, 
selector=0xa68660, sender=0x2b4d9b8) at sendmsg2.c:171
#92243 0x0000000000591c43 in -[Item initWithCoder:] (self=0x2b4d9b8, 
_cmd=0x7ffff7b24820, aDecoder=0xda4308) at Classes/Model/Immutable/Item.m:241
#92244 …. About 80 more stack frames of my code.

Thanks

Tom Davie