I have received this crash report via TestFlight and I am not able to discern any useful information from it:
The crash is 100% reproducible on the user's device, but when I do ostensibly the same set of things on my device the crash does not reproduce, so this is all of the information that I have about crash.
Does anyone have some golden nugget of knowledge related to this that they are willing to help me out with?
Show us the whole crash log or look carefully at it yourself. As @eskimo mentioned here the actual crash might be on a different thread, even when you see "Thread 0 crashed".
So, Thread-2 is actually crashing within "ProcessOutOfLineJob:..." method - unfortunately we don't see the method name on the screenshot to tell what it is. What does the yellow triangle show when you hover over it?
You know that you can reveal the actual crash log in Finder (control click + Show in Finder -> Show Package Contents) - it will reveal more information. Send it here if appropriate.
Do not underestimate the power of hex addresses in the crash log - along with the corresponding binary that can pinpoint you to the right spot in the asm.
Edit: more than likely the crash is somewhere here:
SWIFT_CC(swiftasync)
void ProcessOutOfLineJob::process(Job *job) {
auto self = cast<ProcessOutOfLineJob>(job);
DefaultActorImpl *actor = self->Actor;
delete self;
// Balances with the swift_release in defaultActorDrain()
swift_retain(actor);
return defaultActorDrain(actor); // 'return' forces tail call
}
A full crash report may reveal more.
Here's thread 2 from crashlog.crash:
Thread 2 Crashed:
0 ??? 0x00000000b71b8091 0x0 + 3072032913
1 libswift_Concurrency.dylib 0x00000002276b9828 (anonymous namespace)::ProcessOutOfLineJob::process(swift::Job*) + 884 (Actor.cpp:1323)
2 libswift_Concurrency.dylib 0x00000002276b7eb8 swift::runJobInEstablishedExecutorContext(swift::Job*) + 556 (Actor.cpp:229)
3 libswift_Concurrency.dylib 0x00000002276b8cd0 swift_job_runImpl(swift::Job*, swift::ExecutorRef) + 72 (Actor.cpp:1563)
4 libdispatch.dylib 0x0000000199e15e98 _dispatch_root_queue_drain + 396 (queue.c:7051)
5 libdispatch.dylib 0x0000000199e166c0 _dispatch_worker_thread2 + 164 (queue.c:7119)
6 libsystem_pthread.dylib 0x0000000199fb0038 _pthread_wqthread + 228 (pthread.c:2631)
7 libsystem_pthread.dylib 0x0000000199faed94 start_wqthread + 8
and a better screenshot just in case:
Thank you very much for the help!
You didn't show the beginning of the crash report where this information is:
Incident Identifier: XXX
Hardware Model: iPhone12,1
Process: XXX
Path: XXX
Identifier: XXX
Version: XXX
AppStoreTools: XXX
AppVariant: XXX
Beta: YES
Code Type: ARM-64 (Native)
Role: Foreground
Parent Process: launchd [1]
Coalition: XXX
Date/Time: XXX
Launch Time: XXX
OS Version: XXX
Release Type: User
Baseband Version: XXX
Report Version: XXX
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x00000001c0ae4cd0
Exception Note: EXC_CORPSE_NOTIFY
Termination Reason: SIGNAL 5 Trace/BPT trap: 5
Terminating Process: exc handler [2191]
Also this line from the bottom of the log file, to know exact version and location of libswift_Concurrency.dylib:
0x1c0aab000 - 0x1c0fc1fff libswift_Concurrency.dylib arm64e <383d0f93bac03e4aaec94b2ed9ed9fc1> /usr/lib/xxxx
Here 0x1c0aab000 is the start of the memory segment, 383d0f93bac03e4aaec94b2ed9ed9fc1 is "a build UUID that uniquely identifies the binary image" and "/usr/lib/xxxx" is the file path where you can get the actual library file. You may use "otool -L ..." to get exact library version. How to go from either of that to the corresponding git commit hash - I don't know.
Ideally you need to know exact version to get the corresponding "Actor.cpp" file and look at line 1323.
Alternatively, if you have the libswift_Concurrency.dylib binary file you can atos it. You'll need the numbers (0x00000002276b9828, 884 and the start of the segment are the numbers you'd need to put to atos to get the corresponding line).
It doesn't actually help much yet 
Now you understand where the crash is, approximately or exactly – the next question is how do you fix it..
Thank you for the ideas and suggestions. I'll try out the deep digging techniques shortly if I remain stuck.
Process: XXX [21520]
Path: /Applications/XXX.app/Contents/MacOS/XXX
Identifier: XXX
Version: 1.0 (15)
App Item ID: 1667297799
Code Type: ARM-64
Parent Process: launchd [1]
User ID: 501
Date/Time: 2023-05-03 08:29:58.1817 -0500
OS Version: macOS 13.4 (22F5027f)
Report Version: 12
Anonymous UUID:
Sleep/Wake UUID: D4C12A76-46AE-4E7C-8F9D-0BD46DB41BC1
Time Awake Since Boot: 850000 seconds
Time Since Wake: 47 seconds
System Integrity Protection: enabled
Crashed Thread: 2
Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: UNKNOWN_0x101 at 0x00000000b71b8091
Exception Codes: 0x0000000000000101, 0x00000000b71b8091
Termination Reason: Namespace SIGNAL, Code 10 Bus error: 10
Terminating Process: exc handler [21520]
VM Region Info: 0xb71b8091 is not in any region. Bytes before following region: 1302232943
REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL
UNUSED SPACE AT START
--->
__TEXT 104ba0000-1053f0000 [ 8512K] r-x/r-x SM=COW ...S/XXX
Thread 0:
0 libsystem_kernel.dylib 0x0000000199f73f14 mach_msg2_trap + 8
1 libsystem_kernel.dylib 0x0000000199f86240 mach_msg2_internal + 80 (mach_msg.c:201)
2 libsystem_kernel.dylib 0x0000000199f7cb78 mach_msg_overwrite + 604 (mach_msg.c:0)
3 libsystem_kernel.dylib 0x0000000199f74290 mach_msg + 24 (mach_msg.c:323)
4 CoreFoundation 0x000000019a092888 __CFRunLoopServiceMachPort + 160 (CFRunLoop.c:2622)
5 CoreFoundation 0x000000019a091168 __CFRunLoopRun + 1208 (CFRunLoop.c:3005)
6 CoreFoundation 0x000000019a09055c CFRunLoopRunSpecific + 612 (CFRunLoop.c:3418)
7 HIToolbox 0x00000001a39c6df4 RunCurrentEventLoopInMode + 292 (EventLoop.c:455)
8 HIToolbox 0x00000001a39c6c30 ReceiveNextEventCommon + 648 (EventBlocking.c:384)
9 HIToolbox 0x00000001a39c6988 _BlockUntilNextEventMatchingListInModeWithFilter + 76 (EventBlocking.c:171)
10 AppKit 0x000000019d2aff58 _DPSNextEvent + 636 (CGDPSReplacement.m:818)
11 AppKit 0x000000019d2af0f4 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 716 (appEventRouting.m:407)
12 AppKit 0x000000019d2a3558 -[NSApplication run] + 464 (NSApplication.m:3414)
13 AppKit 0x000000019d27a9a8 NSApplicationMain + 880 (NSApplication.m:9401)
14 SwiftUI 0x00000001c2ab4e34 specialized runApp(_:) + 148
15 SwiftUI 0x00000001c3c14ec8 runApp<A>(_:) + 164 (AppKitApp.swift:13)
16 SwiftUI 0x00000001c349610c static App.main() + 128 (App.swift:114)
17 XXX 0x0000000104ba6e18 static XXX.$main() + 28 (XXX.swift:13)
18 XXX 0x0000000104ba6e18 main + 40 (XXX.swift:0)
19 dyld 0x0000000199c5bf28 start + 2236 (dyldMain.cpp:1165)
Thread 1:
0 libsystem_kernel.dylib 0x0000000199f73f14 mach_msg2_trap + 8
1 libsystem_kernel.dylib 0x0000000199f86240 mach_msg2_internal + 80 (mach_msg.c:201)
2 libsystem_kernel.dylib 0x0000000199f7cb78 mach_msg_overwrite + 604 (mach_msg.c:0)
3 libsystem_kernel.dylib 0x0000000199f74290 mach_msg + 24 (mach_msg.c:323)
4 CoreFoundation 0x000000019a092888 __CFRunLoopServiceMachPort + 160 (CFRunLoop.c:2622)
5 CoreFoundation 0x000000019a091168 __CFRunLoopRun + 1208 (CFRunLoop.c:3005)
6 CoreFoundation 0x000000019a09055c CFRunLoopRunSpecific + 612 (CFRunLoop.c:3418)
7 AppKit 0x000000019d3da508 _NSEventThread + 172 (NSEvent.m:5060)
8 libsystem_pthread.dylib 0x0000000199fb3fa8 _pthread_start + 148 (pthread.c:893)
9 libsystem_pthread.dylib 0x0000000199faeda0 thread_start + 8
Thread 2 Crashed:
0 ??? 0x00000000b71b8091 0x0 + 3072032913
1 libswift_Concurrency.dylib 0x00000002276b9828 (anonymous namespace)::ProcessOutOfLineJob::process(swift::Job*) + 884 (Actor.cpp:1323)
2 libswift_Concurrency.dylib 0x00000002276b7eb8 swift::runJobInEstablishedExecutorContext(swift::Job*) + 556 (Actor.cpp:229)
3 libswift_Concurrency.dylib 0x00000002276b8cd0 swift_job_runImpl(swift::Job*, swift::ExecutorRef) + 72 (Actor.cpp:1563)
4 libdispatch.dylib 0x0000000199e15e98 _dispatch_root_queue_drain + 396 (queue.c:7051)
5 libdispatch.dylib 0x0000000199e166c0 _dispatch_worker_thread2 + 164 (queue.c:7119)
6 libsystem_pthread.dylib 0x0000000199fb0038 _pthread_wqthread + 228 (pthread.c:2631)
7 libsystem_pthread.dylib 0x0000000199faed94 start_wqthread + 8
Thread 3:
0 libsystem_pthread.dylib 0x0000000199faed8c start_wqthread + 0
Thread 4:
0 libsystem_pthread.dylib 0x0000000199faed8c start_wqthread + 0
Thread 5:
0 libsystem_pthread.dylib 0x0000000199faed8c start_wqthread + 0
Thread 6:
0 libsystem_kernel.dylib 0x0000000199f7eff0 __select + 8
1 CoreFoundation 0x000000019a0bc1c8 __CFSocketManager + 636 (CFSocket.c:1340)
2 libsystem_pthread.dylib 0x0000000199fb3fa8 _pthread_start + 148 (pthread.c:893)
3 libsystem_pthread.dylib 0x0000000199faeda0 thread_start + 8
Thread 2 crashed with ARM Thread State (64-bit):
x0: 0x0000000112852740 x1: 0x00006000004ed460 x2: 0xd00000000000001c x3: 0x80000001053268c0
x4: 0x00000001053fecb8 x5: 0x0000000105458238 x6: 0x00000000b71b8091 x7: 0x0000000000000000
x8: 0x0000000280000030 x9: 0xffffffffb24403bd x10: 0x0000000280000020 x11: 0x0000000000000018
x12: 0x00000001103b5650 x13: 0x0000000000000000 x14: 0x00000000000005d8 x15: 0x00000000ffff7dff
x16: 0xfffffffffffffff1 x17: 0x00000001f9c75598 x18: 0x0000000000000000 x19: 0x000000013274ae70
x20: 0xd00000000000001c x21: 0x000000013280b048 x22: 0x0000000280000030 x23: 0x0000000000000000
x24: 0x00000000000000a0 x25: 0x00000002357f1748 x26: 0x00000002357f1758 x27: 0x000000013274ae70
x28: 0x000000013274ae71 fp: 0x000000016b2e6d70 lr: 0x00000002276b7e00
sp: 0x000000016b2e6d20 pc: 0x00000000b71b8091 cpsr: 0x20001000
esr: 0x8a000000 (PC alignment)
Binary Images:
0x104ba0000 - 0x1053effff XXX (arm64) <4B6BF909-7AF8-3AA7-B18B-A44A80FC2D03> /Applications/XXX.app/Contents/MacOS/XXX
0x10f940000 - 0x10f94bfff libobjc-trampolines.dylib (arm64e) <570C31F7-94C6-3B86-AE44-1694DB0A4BCD> /usr/lib/libobjc-trampolines.dylib
0x199c56000 - 0x199ce4557 dyld (arm64e) <AED7DD2C-0325-3172-83E7-3BE31F6D4069> /usr/lib/dyld
0x199e00000 - 0x199e47fff libdispatch.dylib (arm64e) <78FF427C-107B-33C3-A3C2-577AA588DFF1> /usr/lib/system/libdispatch.dylib
0x199f73000 - 0x199facfe7 libsystem_kernel.dylib (arm64e) <222F8841-2BFD-3804-AA0C-F6D80A73FBDF> /usr/lib/system/libsystem_kernel.dylib
0x199fad000 - 0x199fb9fff libsystem_pthread.dylib (arm64e) <7AF7B500-9A6E-3121-A66A-397C209B5C83> /usr/lib/system/libsystem_pthread.dylib
0x19a013000 - 0x19a4ecfff CoreFoundation (arm64e) <433F10EB-0585-3EDE-9276-05224D8DA19E> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
0x19d277000 - 0x19e185fff AppKit (arm64e) <5D521D06-B060-367F-978C-13303EA0DC9C> /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
0x1a3996000 - 0x1a3cc9fff HIToolbox (arm64e) <112F06BD-C55A-3939-960E-C5C67BA98E55> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox
0x1c2a19000 - 0x1c42b0fff SwiftUI (arm64e) <078163FA-F3C9-35F9-8FAF-ABB888D9BDBD> /System/Library/Frameworks/SwiftUI.framework/Versions/A/SwiftUI
0x227677000 - 0x2276d1ffb libswift_Concurrency.dylib (arm64e) <D3362AF1-B5DD-3922-831B-A5BA6D4ABA6F> /usr/lib/swift/libswift_Concurrency.dylib
External Modification Summary:
Calls made by other processes targeting this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by all processes on this machine:
task_for_pid: 2
thread_create: 0
thread_set_state: 26
VM Region Summary:
ReadOnly portion of Libraries: Total=1.3G resident=0K(0%) swapped_out_or_unallocated=1.3G(100%)
Writable regions: Total=5.0G written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=5.0G(100%)
VIRTUAL REGION
REGION TYPE SIZE COUNT (non-coalesced)
=========== ======= =======
Accelerate framework 128K 1
Activity Tracing 256K 1
CG backing stores 3520K 4
CG image 64K 2
ColorSync 576K 26
CoreAnimation 14.3M 57
CoreGraphics 32K 2
CoreUI image data 736K 5
Foundation 16K 1
Image IO 1056K 2
Kernel Alloc Once 32K 1
MALLOC 436.3M 58
MALLOC guard page 192K 10
MALLOC_LARGE (reserved) 3.1G 1 reserved VM address space (unallocated)
MALLOC_MEDIUM (reserved) 1.1G 9 reserved VM address space (unallocated)
MALLOC_NANO (reserved) 384.0M 1 reserved VM address space (unallocated)
STACK GUARD 56.1M 7
Stack 11.2M 7
VM_ALLOCATE 1200K 12
__AUTH 1311K 279
__AUTH_CONST 21.9M 485
__CTF 824 1
__DATA 9801K 471
__DATA_CONST 21.8M 488
__DATA_DIRTY 1389K 163
__FONT_DATA 2352 1
__LINKEDIT 803.1M 3
__OBJC_RO 66.3M 1
__OBJC_RW 2010K 1
__TEXT 481.4M 508
dyld private memory 272K 2
mapped file 191.2M 34
shared memory 912K 16
=========== ======= =======
TOTAL 6.6G 2660
TOTAL, minus reserved VM space 2.1G 2660
EOF
BTW, macOS 13.4 (22F5027f) is Beta..
Someone here might recommend a way to get to the corresponding github commit hash.