crash in  -[NSObject(RACDeallocating) rac_deallocDisposable] NSObject+RACDeallocating.m

this is the messages：
MACH_Exception EXC_BAD_ACCESS KERN_INVALID_ADDRESS fault_address:0x0000036e4972657e

Thread 0 name: com.apple.main-thread

cache_t::shouldFlush(objc_selector*, void (*)()) const (in libobjc.A.dylib)
_method_setImplementation (in libobjc.A.dylib)
-[NSObject(RACDeallocating) rac_deallocDisposable] NSObject+RACDeallocating.m:94