Crash: -[GBPing stop] (GBPing.m:633)

[jaybowang]

Crashed: com.apple.main-thread
0  libobjc.A.dylib                0x181529b90 objc_msgSend + 16
1  CoreFoundation                 0x181ddeefc -[__NSDictionaryM removeAllObjects] + 512
2  ??????                         0x10069a554 -[GBPing stop] (GBPing.m:633)
3  ??????                         0x100313c70 specialized Ping.(start(completion : ([String : [String]]?) -> ()) -> ()).(closure #2).(closure #1).(closure #1) (Ping.swift:103)
4  ??????                         0x100314d6c partial apply for Ping.(start(completion : ([String : [String]]?) -> ()) -> ()).(closure #2).(closure #1).(closure #1) (Ping.swift)
5  libdispatch.dylib              0x1818fd4bc _dispatch_call_block_and_release + 24
6  libdispatch.dylib              0x1818fd47c _dispatch_client_callout + 16
7  libdispatch.dylib              0x181908d08 _dispatch_after_timer_callback + 92
8  libdispatch.dylib              0x1818fd47c _dispatch_client_callout + 16
9  libdispatch.dylib              0x181914090 _dispatch_source_latch_and_call + 2556
10 libdispatch.dylib              0x1818ff970 _dispatch_source_invoke + 808
11 libdispatch.dylib              0x18190263c _dispatch_main_queue_callback_4CF + 492
12 CoreFoundation                 0x181e68d50 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
13 CoreFoundation                 0x181e66bb8 __CFRunLoopRun + 1628
14 CoreFoundation                 0x181d90c50 CFRunLoopRunSpecific + 384
15 GraphicsServices               0x183678088 GSEventRunModal + 180
16 UIKit                          0x18707a088 UIApplicationMain + 204
17 ??????                         0x1000e2f04 main (main.m:14)
18 libdispatch.dylib              0x18192e8b8 (Missing)

It looks wired to me. I've no idea yet.