:thread: Issue Migrating a Compose iOS App to K2 ...

# compose-ios

[Aaron Alaniz]

🧵 Issue Migrating a Compose iOS App to K2

I have a Compose Multiplatform app for iOS and Android that I recently migrated to Kotlin 2.0. The migration went mostly as expected, but I experienced a new crash when running a small suite of Maestro tests that run on Maestro Cloud.

[Aaron Alaniz]

The tests pass when run on Android devices in Maestro Cloud and locally on an iPhone 15 simulator running iOS 17.5 (iMac M1). I cannot root cause what is causing them to crash on the iOS simulators in Maestro Cloud.

[Aaron Alaniz]

Here is the crash stack trace.

[Aaron Alaniz]

Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fff7017322a __pthread_kill + 10
1 libsystem_pthread.dylib 0x00007fff701ccf7b pthread_kill + 263
2 libsystem_c.dylib 0x0000000114aa06b7 abort + 130
3 xyz.alaniz.aaron.Lightsaber 0x000000011053f59e (anonymous namespace)::terminateWithUnhandledException(ObjHeader*)::$_1::operator()() const + 14
4 xyz.alaniz.aaron.Lightsaber 0x000000011053f47f void (anonymous namespace)::$_0::operator()<(anonymous namespace)::terminateWithUnhandledException(ObjHeader*)::$_1>((anonymous namespace)::terminateWithUnhandledException(ObjHeader*)::$_1) + 47
5 xyz.alaniz.aaron.Lightsaber 0x000000011053f299 (anonymous namespace)::terminateWithUnhandledException(ObjHeader*) + 9
6 xyz.alaniz.aaron.Lightsaber 0x000000011053f257 (anonymous namespace)::processUnhandledException(ObjHeader*) + 55
7 xyz.alaniz.aaron.Lightsaber 0x000000011053ef59 (anonymous namespace):TerminateHandler:kotlinHandler() + 217
8 libc++abi.dylib 0x00000001135879c7 std::__terminate(void (*)()) + 8
9 libc++abi.dylib 0x000000011358a204 __cxa_rethrow + 99
10 libobjc.A.dylib 0x00000001128d9baf objc_exception_rethrow + 37
11 com.apple.CoreFoundation 0x0000000112aa8825 CFRunLoopRunSpecific + 851
12 com.apple.GraphicsServices 0x0000000117e27c8e GSEventRunModal + 139
13 com.apple.UIKitCore 0x000000012d12165a -[UIApplication _run] + 928
14 com.apple.UIKitCore 0x000000012d1262b5 UIApplicationMain + 101
15 com.apple.SwiftUI 0x0000000120443e5d closure #1 in KitRendererCommon(_:) + 196
16 com.apple.SwiftUI 0x0000000120443d97 runApp<A>(_:) + 148
17 com.apple.SwiftUI 0x000000011fe06854 static App.main() + 61
18 xyz.alaniz.aaron.Lightsaber 0x000000010f7b3cae static iOSApp.$main() + 30
19 xyz.alaniz.aaron.Lightsaber 0x000000010f7b3d49 main + 9
20 dyld_sim 0x000000011277ff21 start_sim + 10
21 dyld 0x000000011f8db310 start + 2432

[Aaron Alaniz]

At first, I thought this was some sort of architecture issue since the tests pass fine on my M1 and the Maestro cloud simulators require X86

[Aaron Alaniz]

I am not an iOS expert, but I think this xcodebuild argument ensures that the app is built to support x86

ARCHS='arm64 x86_64' ONLY_ACTIVE_ARCH=NO

[Landry Norris]

I saw a similar crash in the past if I let the phone fall asleep while a coroutine was running in a background thread (I want to say it gets a SIGABRT after 10 seconds or so). It looked very similar to what you see here.

[Aaron Alaniz]

Interesting. In this instance, the app crashes immediately upon launch