EXC_BREAKPOINT Crashed: com.apple.root.default-qos

During the last days I've been receiving a crash report through Fabric.io (Crashlytics). However I am having issues understanding what is going on:


Crashed: com.apple.root.default-qos
0  libsystem_malloc.dylib         0x1dc027774 nanov2_allocate_from_block$VARIANT$mp + 540
1  libsystem_malloc.dylib         0x1dc027774 nanov2_allocate_from_block$VARIANT$mp + 540
2  libsystem_malloc.dylib         0x1dc0269d0 nanov2_allocate$VARIANT$mp + 140
3  libsystem_malloc.dylib         0x1dc0268f4 nanov2_malloc$VARIANT$mp + 60
4  libsystem_malloc.dylib         0x1dc0359a0 malloc_zone_malloc + 156
5  CoreFoundation                 0x1dc3ea160 _CFRuntimeCreateInstance + 324
6  CoreFoundation                 0x1dc487200 CFBasicHashCreate + 72
7  CoreFoundation                 0x1dc3b46f8 __CFDictionaryCreateGeneric + 148
8  CoreFoundation                 0x1dc3b471c CFDictionaryCreateMutable + 24
9  CoreFoundation                 0x1dc3c0808 CFLocaleCreateComponentsFromLocaleIdentifier + 80
10 CoreFoundation                 0x1dc4778fc __CFCalendarCreateUCalendar + 88
11 CoreFoundation                 0x1dc470094 CFCalendarCreateWithIdentifier + 604
12 CoreFoundation                 0x1dc353da0 -[__NSCFCalendar initWithCalendarIdentifier:] + 32
13 MyApp                             0x100f068f8 -[MOCARecurrence accept:] (Recurrence.m:84)
14 MyApp                             0x100f14780 -[MOCACampaign isActive:] (Campaign.m:196)
........


In the Frame 13 ([MOCARegurrence accept:]) line 84 I basically allocate a new NSCalendar:

    NSCalendar *cal = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];



Device details:


iOS 12

Free RAM: 164MB

Free disk: 64GB


I does not happen often (4 users out of ~6000 and only once each.)


Any help would be appreciated.

EXC_BREAKPOINT Crashed: com.apple.root.default-qos
 
 
Q