Volodymyr Smolianinov Volodymyr Smolianinov - 1 month ago 114
iOS Question

Unknown crash in Fabric [FIRAAlarm cancel]

After I released a new version of my app using XCode8, this crash was reported in Fabric:

#0. Crashed: com.apple.main-thread
0 libdispatch.dylib 0x187c89834 dispatch_source_cancel + 4
1 Appname 0x1003d866c -[FIRAAlarm cancel] + 4298868332
2 Appname 0x1003d8318 -[FIRAAlarm runAfterDelay:withBlock:] + 4298867480
3 Appname 0x1003fc054 -[FIRASessionReporter rescheduleSessionStartTimer] + 4299014228
4 CoreFoundation 0x188d9622c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 20
5 CoreFoundation 0x188d95930 _CFXRegistrationPost + 400
6 CoreFoundation 0x188d956ac ___CFXNotificationPost_block_invoke + 60
7 CoreFoundation 0x188e04b9c -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1504
8 CoreFoundation 0x188cd7bf4 _CFXNotificationPost + 376
9 Foundation 0x1897de6bc -[NSNotificationCenter postNotificationName:object:userInfo:] + 68
10 UIKit 0x18ecca284 <redacted> + 1212
11 UIKit 0x18eecdd20 <redacted> + 2744
12 UIKit 0x18eee2080 <redacted> + 48
13 UIKit 0x18eeca8c4 <redacted> + 168
14 FrontBoardServices 0x18a99d8bc <redacted> + 36
15 FrontBoardServices 0x18a99d728 <redacted> + 176
16 FrontBoardServices 0x18a99dad0 <redacted> + 56
17 CoreFoundation 0x188daa278 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
18 CoreFoundation 0x188da9bc0 __CFRunLoopDoSources0 + 524
19 CoreFoundation 0x188da77c0 __CFRunLoopRun + 804
20 CoreFoundation 0x188cd6048 CFRunLoopRunSpecific + 444
21 UIKit 0x18ecb05dc <redacted> + 608
22 UIKit 0x18ecab360 UIApplicationMain + 208
23 Appname 0x1000f6724 main (main.m:15)
24 libdispatch.dylib 0x187cb85b8 (Missing)


The crash detail doesn't show any specific file, just this information:

Appname
#CrashNumber-[FIRAAlarm cancel]


Any ideas what this “FIRAAlarm” is?

Answer

This is a known Firebase issue and will be fixed in their next release: https://groups.google.com/forum/#!topic/firebase-talk/W-gPv4tmXpw