Crash on iOS after splash screen

Development Programming & Scripting Blueprint
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1

In my demo I have an actor which creates widget in BeginPlay event. Other actions performs only in custom events (I’m pretty sure that they did not occurred). But anyway I get crash after splash screen. How to solve it? I will be very grateful for any help.

Thread 1 name:  Dispatch queue: com.apple.NSURLSession-work
Thread 1 Crashed:
0   UE4Demo               	0x00000001040ad624 FOutputDevice::LogfImpl+ 29546020 (char16_t const*, ...) + 204
1   UE4Demo               	0x00000001040ad5b8 FOutputDevice::LogfImpl+ 29545912 (char16_t const*, ...) + 96
2   UE4Demo               	0x000000010401bf88 FDebug::AssertFailed+ 28950408 (char const*, char const*, int, char16_t const*, ...) + 312
3   UE4Demo               	0x0000000103f01eec FGenericPlatformTime::GetSecondsPerCycle64+ 27795180 () + 244
4   UE4Demo               	0x0000000103f43c4c FThreadHeartBeat::Get+ 28064844 () + 464
5   UE4Demo               	0x0000000104035bfc FDebug::EnsureFailed+ 29055996 (char const*, char const*, int, char16_t const*, int) + 384
6   UE4Demo               	0x0000000104036288 FDebug::OptionallyLogFormattedEnsureMessageReturningFalseImpl+ 29057672 (bool, char const*, char const*, int, char16_t const*, ...) + 116
7   UE4Demo               	0x0000000103f1d780 LLMMap<PointerKey, unsigned int, ELLMTag>::Remove+ 27907968 (PointerKey const&) + 464
8   UE4Demo               	0x0000000103f1bae0 FLLMTracker::TrackFree+ 27900640 (void const*, ELLMTracker, ELLMAllocType) + 112
9   UE4Demo               	0x0000000103f4849c FMemory::Free+ 28083356 (void*) + 200
10  CFNetwork                     	0x00000001bb945ce0 0x1bb914000 + 204000
11  CFNetwork                     	0x00000001bb945c28 0x1bb914000 + 203816
12  CFNetwork                     	0x00000001bb920300 0x1bb914000 + 49920
13  CFNetwork                     	0x00000001bb91ae14 0x1bb914000 + 28180
14  libsystem_blocks.dylib        	0x00000001bae0ca44 0x1bae0c000 + 2628
15  libobjc.A.dylib               	0x00000001ba565b9c 0x1ba546000 + 129948
16  libdispatch.dylib             	0x00000001badb17b4 0x1bad51000 + 395188
17  libdispatch.dylib             	0x00000001bad8d988 0x1bad51000 + 248200
18  libdispatch.dylib             	0x00000001bad95e08 0x1bad51000 + 282120
19  libsystem_pthread.dylib       	0x00000001baf91114 0x1baf85000 + 49428
20  libsystem_pthread.dylib       	0x00000001baf93cd4 0x1baf85000 + 60628
2

Hi! Did you have solved that? We have met the exactly same crash with the same stacktrace.

3

I think it’s a bug in UE4.21. I succeeded to run my project the following way: open xcode project from Intermediate folder, add -ObjC in “Other linker flags” and that’s it. So it seems that UE ignores other linker flags in 4.21.
I have no the problem with 4.22, but I met other bugs in that version: