This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(227.2, 45%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EM%3C/text%3E%3C/svg%3E)
The MAUI app works fine on Android and most iOS devices, but a few users have reported that it crashes immediately after launch. However, I couldn't reproduce the error in my local environment.
It is built with the latest:
Xcode: 15.4
.Net 8.0.7
MAUI 8.0.70
Tested on Simulators/physical devices with 17.5.1, 17.4, 17.2 without issues
However, I do see crashes on the user's device through TestFlight. Here is a portion of the crash log. I do not fully understand the error message and would appreciate any help.
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Termination Reason: SIGNAL 6 Abort trap: 6
Terminating Process: AppName [12874]
Triggered by Thread: 0
Kernel Triage:
VM - (arg = 0x3) mach_vm_allocate_kernel failed within call to vm_map_enter
VM - (arg = 0x3) mach_vm_allocate_kernel failed within call to vm_map_enter
VM - (arg = 0x3) mach_vm_allocate_kernel failed within call to vm_map_enter
VM - (arg = 0x3) mach_vm_allocate_kernel failed within call to vm_map_enter
VM - (arg = 0x3) mach_vm_allocate_kernel failed within call to vm_map_enter
Thread 0 name:
Thread 0 name:
Thread 0 Crashed:
0 libsystem_kernel.dylib 0x00000001da7a742c __pthread_kill + 8 (:-1)
1 libsystem_pthread.dylib 0x00000001ee546c0c pthread_kill + 268 (pthread.c:1721)
2 libsystem_c.dylib 0x000000019964aba0 abort + 180 (abort.c:118)
3 AppName 0x00000001029e7a98 0x1026b4000 + 3357336
4 AppName 0x00000001029598f0 0x1026b4000 + 2775280
5 libsystem_platform.dylib 0x00000001ee48ae9c _sigtramp + 56 (sigtramp.c:116)
6 libsystem_pthread.dylib 0x00000001ee546c0c pthread_kill + 268 (pthread.c:1721)
7 libsystem_c.dylib 0x000000019964aba0 abort + 180 (abort.c:118)
8 AppName 0x00000001026e3a80 0x1026b4000 + 195200
9 AppName 0x00000001028955a0 0x1026b4000 + 1971616
10 AppName 0x000000010293008c 0x1026b4000 + 2605196
11 AppName 0x00000001026ec0a4 0x1026b4000 + 229540
12 AppName 0x00000001029981c0 0x1026b4000 + 3031488
13 dyld 0x00000001b4d6de4c start + 2240 (dyldMain.cpp:1298)
Thread 0 crashed with ARM Thread State (64-bit):
x0: 0x0000000000000000 x1: 0x0000000000000000 x2: 0x0000000000000000 x3: 0x0000000000000000
x4: 0xffffffff9532841b x5: 0x0000000000000018 x6: 0x000000016d74ad50 x7: 0x000000016d74a440
x8: 0x8f0f7a9f1b3b9fcb x9: 0x8f0f7a9ee905a10b x10: 0x0000000000000200 x11: 0x000000016d74a4b0
x12: 0x0000000000000000 x13: 0x00000001026e0d04 x14: 0x0000000000000010 x15: 0x0000000000000000
x16: 0x0000000000000148 x17: 0x00000001f23e3ec0 x18: 0x0000000000000000 x19: 0x0000000000000006
x20: 0x0000000000000103 x21: 0x00000001f23e3fa0 x22: 0x0000000103957200 x23: 0x0000000000000001
x24: 0x00000003034c8870 x25: 0x0000000000000000 x26: 0x0000000000000000 x27: 0x000000016d74bc65
x28: 0x00000003022c8120 fp: 0x000000016d74ad60 lr: 0x00000001ee546c0c
sp: 0x000000016d74ad40 pc: 0x00000001da7a742c cpsr: 0x40001000
esr: 0x56000080 Address size fault
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(22.400000000000002, 3%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EWZ%3C/text%3E%3C/svg%3E)
What are the iOS versions of these devices that occur crash? Could you provide the whole crash log?
Here is the crashlog. It's from iOS 17.5.1 device.
However, it works fine on my 17.5.1 device/simulator
iPhone15 Pro Max uses the Apple's A17 pro arm. I understand that this issue doesn't occur on your device, is your device iPhone15 Pro Max or iPhone15 pro?
Mine is IPhone 15 pro. But we got same crash log from IPhone 15 or 14 with 17.5.1 too
Now we can identity that this issue only occurs on all iOS17.5 devices, right? And it's not a crash, it's an abort due to an exception. Could you add some code/crash analysis packages as Bruce suggested?
We have Raygun crash reporting enabled all over the project with CatchUnhandledExceptions = true, it can't catch any exceptions before the crash. I will try to add more.
Error on posting comments..test...
OK, waiting for your update.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(217.60000000000002, 9%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPS%3C/text%3E%3C/svg%3E)
I have the same problem
Has there been any progress on this issue?
Updates:
I’ve added more exception handling to the initialization code, including subscribing to unhandled exceptions manually beside Raygun. However, it still crashes on a few iOS devices without any exceptions being caught. This issue only occurs on iOS, as the Android build from the same codebase works fine without any problems.
Hi @Peter Shu , I noticed that the crash was under background, do you and any background task？
Hi @ MT, from the screenshot is hard to know how the crash was triggered. Could you share the whole log?
Does it work for you?
Take two days to verify, but I don't think there's anything wrong with what's said here
It's a timmer issue in my case. It works fine in release mode with None settings
<MtouchLink>None</MtouchLink>
Thanks for your sharing.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(211.20000000000002, 61%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBS%3C/text%3E%3C/svg%3E)
the exception type EXC_CRASH (SIGABRT) means the program triggered an abort. that means the .net code threw an uncaught exception. you probably need to add better exception handling and logging. it is probably your init code.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(57.599999999999994, 9%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERD%3C/text%3E%3C/svg%3E)
What "fixed" it for me was to use this in project:
<PropertyGroup>
<MtouchInterpreter>all</MtouchInterpreter>
<UseInterpreter>True</UseInterpreter>
</PropertyGroup>
This always enabled in debug, but disabled in release. This means you called code that requires dynamic code generation which aot does not support (usually related to reflection). See this thread:
Thank you Bruce for taking the time to post/reply and provide the link. Appreciate it.