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I'm starting to get a lot of reports of random crashes on iOS 15.4. Taking a look at the logs it seems to be primarily around native thread creation and joins. I have been unable to reproduce the issue myself. Wondering if anyone has seen this or if there is anything they can glean from this crash log: Thanks in advance. Hardware Model: iPhone9,3 Process: egginc [7122] Path: /private/var/containers/Bundle/Application/2471E88B-C3CD-45D4-98E0-99D8C4B5A202/egginc.app/egginc Identifier: com.auxbrain.egginc Version: 1.22.6 (1.22.6.0) AppStoreTools: 13E112 AppVariant: 1:iPhone9,3:15 Code Type: ARM-64 (Native) Role: Foreground Parent Process: launchd [1] Coalition: com.auxbrain.egginc [1087] Date/Time: 2022-03-22 23:27:31.3687 -0400 Launch Time: 2022-03-22 23:26:16.6376 -0400 OS Version: iPhone OS 15.4 (19E241) Release Type: User Baseband Version: 6.02.02 Report Version: 104 Exception Type: EXC_CRASH (SIGKILL) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Termination Reason: FRONTBOARD 2343432205 <RBSTerminateContext| domain:10 code:0x8BADF00D explanation:[application<com.auxbrain.egginc>:7122] failed to terminate gracefully after 5.0s ProcessVisibility: Unknown ProcessState: Running WatchdogEvent: process-exit WatchdogVisibility: Background WatchdogCPUStatistics: ( "Elapsed total CPU time (seconds): 4.250 (user 4.250, system 0.000), 38% CPU", "Elapsed application CPU time (seconds): 0.064, 1% CPU" ) reportType:CrashLog maxTerminationResistance:Interactive> Triggered by Thread: 0 Thread 0 name: Thread 0 Crashed: 0 libsystem_pthread.dylib 0x00000001dc2ec64c _pthread_create + 944 (pthread.c:1440) 1 libsystem_pthread.dylib 0x00000001dc2ec638 _pthread_create + 924 (inline_internal.h:128) 2 egginc 0x0000000104ec3048 std::__1::__libcpp_thread_create(_opaque_pthread_t**, void* (*)(void*), void*) + 24 (__threading_support:421) 3 egginc 0x0000000104ec3048 std::__1::thread::thread<std::__1::packaged_task<int ()>, void>(std::__1::packaged_task<int ()>&&) + 348 (thread:314) 4 egginc 0x0000000104ebeb20 std::__1::thread::thread<std::__1::packaged_task<int ()>, void>(std::__1::packaged_task<int ()>&&) + 8 (thread:306) 5 egginc 0x0000000104ebeb20 BatchedMesh::kickoffUpdates(GLState&) + 40 (batchedmesh.cpp:969) 6 egginc 0x00000001047978ec ShadowedMesh::getVaos(GLState&) + 92 (shadowedmesh.cpp:501) 7 egginc 0x0000000104ed3ba4 SVRenderNode::drawPreShadowVolume(GLState&) const + 176 (svrendernode.cpp:25) 8 egginc 0x00000001049b0f50 RenderList::draw(GLState&) const + 4948 (renderlist.cpp:238) 9 egginc 0x00000001047898ec GameControllerBase::render(GLState&, float, unsigned int, unsigned int, unsigned int) const + 620 (gamecontrollerbase.cpp:332) 10 egginc 0x000000010478150c -[ZHViewController glkView:drawInRect:] + 360 (ZHViewController.mm:414) 11 GLKit 0x00000001c0791cc0 -[GLKView _display:] + 208 (GLKView.m:590) 12 egginc 0x0000000104781b74 -[ZHViewController drawView:] + 828 (ZHViewController.mm:530) 13 QuartzCore 0x0000000184c5c620 CA::Display::DisplayLink::dispatch_items(unsigned long long, unsigned long long, unsigned long long) + 760 (CADisplay.mm:4175) 14 QuartzCore 0x0000000184c631d4 display_timer_callback(__CFMachPort*, void*, long, void*) + 368 (CADisplayTimer.cpp:219) 15 CoreFoundation 0x00000001811674dc __CFMachPortPerform + 172 (CFMachPort.c:549) 16 CoreFoundation 0x00000001811a7714 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 56 (CFRunLoop.c:1996) 17 CoreFoundation 0x00000001811aad10 __CFRunLoopDoSource1 + 596 (CFRunLoop.c:2136) 18 CoreFoundation 0x0000000181167f40 __CFRunLoopRun + 2392 (CFRunLoop.c:3172) 19 CoreFoundation 0x000000018117ac30 CFRunLoopRunSpecific + 572 (CFRunLoop.c:3268) 20 GraphicsServices 0x00000001a1b95988 GSEventRunModal + 160 (GSEvent.c:2200) 21 UIKitCore 0x0000000183975c50 -[UIApplication _run] + 1080 (UIApplication.m:3511) 22 UIKitCore 0x000000018370f3d0 UIApplicationMain + 336 (UIApplication.m:5064) 23 egginc 0x000000010477f1f8 main + 60 (main.m:16) 24 dyld 0x00000001066043d0 start + 444 (dyldMain.cpp:879) Thread 1 name: Thread 1: 0 libsystem_kernel.dylib 0x00000001bb938aac mach_msg_trap + 8 1 libsystem_kernel.dylib 0x00000001bb93907c mach_msg + 72 (mach_msg.c:119) 2 CoreFoundation 0x0000000181163768 __CFRunLoopServiceMachPort + 368 (CFRunLoop.c:2646) 3 CoreFoundation 0x0000000181167a70 __CFRunLoopRun + 1160 (CFRunLoop.c:3000) 4 CoreFoundation 0x000000018117ac30 CFRunLoopRunSpecific + 572 (CFRunLoop.c:3268) 5 Foundation 0x0000000182883eac -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 232 (NSRunLoop.m:373) 6 Foundation 0x00000001828c2e90 -[NSRunLoop(NSRunLoop) runUntilDate:] + 88 (NSRunLoop.m:420) 7 UIKitCore 0x00000001838f50a0 -[UIEventFetcher threadMain] + 512 (UIEventFetcher.m:1167) 8 Foundation 0x00000001828d0d2c __NSThread__start__ + 792 (NSThread.m:972) 9 libsystem_pthread.dylib 0x00000001dc2e9348 _pthread_start + 116 (pthread.c:891) 10 libsystem_pthread.dylib 0x00000001dc2e7948 thread_start + 8 [Full Crash Log](https://developer.apple.com/forums/content/attachment/5f6d5df2-9162-4edf-be6f-1ef36bcbf394)