Terminating app due to uncaught exception 'block', reason: 'block'

[junqhao]

hello, there are a lot of same crashes collected like below, any idea about it?

Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x00000000 at 0x0000000000000000
Crashed Thread: 33
Application Specific Information:
*** Terminating app due to uncaught exception 'block', reason: 'block'

Thread 33 Crashed:
0 AppName 0x0000000101649258 kscm_reportUserException + 11358808 (KSCrashMonitor_User.c:0)
1 AppName 0x000000010290d9f0 wpk_kscrash_reportUserException + 31037936 (KSCrashC.c:276)
2 AppName 0x000000010291ac24 -[WPKKSCrash reportUserException:reason:language:lineOfCode:stackTrace:logAllThreads:terminateProgram:] + 31091748 (KSCrash.m:396)
3 AppName 0x0000000102920620 -[WPKInternalThreadBlockChecker markAsMainThreadBlockedWithInterval:] + 31114784 (WPKInternalThreadBlockChecker.m:46)
4 AppName 0x000000010290e92c __35-[WPKThreadBlockChecker checkBeat:]_block_invoke + 31041836 (WPKThreadBlockChecker.m:264)
5 libdispatch.dylib 0x00000001a6cf1298 0x1a6c90000 + 397976 ( + 16)
6 libdispatch.dylib 0x00000001a6c96028 0x1a6c90000 + 24616 ( + 412)
7 libdispatch.dylib 0x00000001a6ca6d64 0x1a6c90000 + 93540 ( + 1304)
8 libdispatch.dylib 0x00000001a6c99908 0x1a6c90000 + 39176 ( + 300)
9 libdispatch.dylib 0x00000001a6c9a518 0x1a6c90000 + 42264 ( + 420)
10 libdispatch.dylib 0x00000001a6ca3fac 0x1a6c90000 + 81836 ( + 712)
11 libsystem_pthread.dylib 0x00000001eeafd5bc 0x1eeaf2000 + 46524 (_pthread_wqthread + 272)
12 libsystem_pthread.dylib 0x00000001eeb0086c 0x1eeaf2000 + 59500 (start_wqthread + 8)