It unfortunately still causes a segfault for my FSEvents RubyCocoa code in Kicker :(
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: 13 at address: 0x0000000000000000
0x00007fff81dc0120 in objc_msgSend ()
(gdb) bt
#0 0x00007fff81dc0120 in objc_msgSend ()
#1 0x00000001001c8c14 in ocid_to_rbobj_cache_only ()
#2 0x00000001001c9a34 in ocdata_to_rbobj ()
#3 0x00000001001ca838 in rbobj_to_ocdata ()
#4 0x00007fff86e28b07 in ffi_closure_unix64_inner ()
#5 0x00007fff86e27fa6 in ffi_closure_unix64 ()
#6 0x00007fff86e4db50 in _Xcallback_rpc ()
#7 0x00007fff86e4d9bd in FSEventsD2F_server ()
#8 0x00007fff86e825e7 in FSEventsClientProcessMessageCallback ()
#9 0x00007fff8852968e in __CFMachPortPerform ()
#10 0x00007fff885016e1 in __CFRunLoopRun ()
#11 0x00007fff884ffdbf in CFRunLoopRunSpecific ()
#12 0x00007fff884ffb46 in CFRunLoopRun ()
#13 0x00007fff86e27e24 in ffi_call_unix64 ()