[SRWebSocket _pumpWriting] crash

[liaochangping]

my app crash record:
Thread 35 Crashed:
0 libsystem_platform.dylib 0x00000001ea8181c4 _os_unfair_lock_recursive_abort + 36 (lock.c:515)
1 libsystem_platform.dylib 0x00000001ea81555c _os_unfair_lock_lock_slow + 320 (lock.c:597)
2 CoreFoundation 0x000000018df1c344 CFSocketInvalidate + 136 (CFSocket.c:1719)
3 CFNetwork 0x000000018f0f2598 Schedulables::_SchedulablesInvalidateApplierFunction(void const*, void*) + 36 (Schedulables.cpp:74)
4 CoreFoundation 0x000000018de52b50 CFArrayApplyFunction + 72 (CFArray.c:672)
5 CFNetwork 0x000000018f0e017c SocketStream::~SocketStream() + 448 (SocketStream.cpp:748)
6 CoreFoundation 0x000000018de00888 _CFRelease + 292 (CFRuntime.c:2256)
7 CoreFoundation 0x000000018df1c67c CFSocketInvalidate + 960 (CFSocket.c:1782)
8 CFNetwork 0x000000018f0e50e8 SocketStream::close(void const*) + 488 (SocketStream.cpp:1463)
9 CoreFoundation 0x000000018de5497c _CFStreamClose + 108 (CFStream.c:309)
10 tztApp 0x0000000102889a74 -[SRWebSocket _pumpWriting] + 592 (SRWebSocket.m:1208)
11 tztApp 0x0000000102887fb8 __30-[SRWebSocket _failWithError:]_block_invoke + 208 (SRWebSocket.m:789)
12 libdispatch.dylib 0x0000000195d2113c _dispatch_call_block_and_release + 32 (init.c:1530)
13 libdispatch.dylib 0x0000000195d22dd4 _dispatch_client_callout + 20 (object.m:576)
14 libdispatch.dylib 0x0000000195d2a400 _dispatch_lane_serial_drain + 748 (queue.c:3900)
15 libdispatch.dylib 0x0000000195d2af30 _dispatch_lane_invoke + 380 (queue.c:3991)
16 libdispatch.dylib 0x0000000195d35cb4 _dispatch_root_queue_drain_deferred_wlh + 288 (queue.c:6998)
17 libdispatch.dylib 0x0000000195d35528 _dispatch_workloop_worker_thread + 404 (queue.c:6592)
18 libsystem_pthread.dylib 0x00000001ea8cc934 _pthread_wqthread + 288 (pthread.c:2696)
19 libsystem_pthread.dylib 0x00000001ea8c90cc start_wqthread + 8 (:-1)

help me !!