Crash at MonodroidRuntime::Java_mono_android_Runtime_register

[akravch]

Android application type

Android for .NET (net6.0-android, etc.)

Affected platform version

.NET 6.0.400

Description

The app crashes when handling a notification using AndroidX.Work.Worker in background.

Steps to Reproduce

1. Checkout the sample repo
2. Build and launch the app
3. Once you see the toast "Scheduled notification", kill the app removing it from Recents
4. Wait 5 seconds, then launch the app
5. Crash

Did you find any workaround?

No.

Relevant log output

Cause: null pointer dereference
    x0  0000007b0eb306a8  x1  0000007b0eb307c0  x2  0000007b0eb30860  x3  0000000000000000
    x4  0000007b0eb30750  x5  0000007b0eb30528  x6  0000000000000000  x7  0000000000000000
    x8  0000007b0eb307c0  x9  00000000000001f5  x10 0000000000000001  x11 0000000000000000
    x12 0000000000000000  x13 00000000b5be16e3  x14 0000000000000006  x15 ffffffffffffffff
    x16 0000007b18fe07a8  x17 0000007ea7c0fadc  x18 0000007b0dd2c000  x19 0000007b0eb306a8
    x20 0000007b0eb307c0  x21 0000000000000000  x22 0000000000000118  x23 b400007ce36942d0
    x24 0000007b9fc00880  x25 0000007b0eb32000  x26 0000007b7f1e9e80  x27 0000007ba0415000
    x28 0000007b0eb309a0  x29 0000007b0eb30740
    lr  0000007b18de492c  sp  0000007b0eb306a0  pc  0000007b18de4998  pst 0000000020001000
backtrace:
      #00 pc 000000000010a998  /data/app/~~NlbrfHs5ba3V6liwEbCluA==/com.companyname.net6notifications-oabfrmJ4bWOpNGyqujVDwQ==/lib/arm64/libmonosgen-2.0.so (BuildId: 4a5dd4396e8816b7f69881838bd549285213d53b)
      #01 pc 000000000010a7e0  /data/app/~~NlbrfHs5ba3V6liwEbCluA==/com.companyname.net6notifications-oabfrmJ4bWOpNGyqujVDwQ==/lib/arm64/libmonosgen-2.0.so (BuildId: 4a5dd4396e8816b7f69881838bd549285213d53b)
      #02 pc 000000000009abe4  /data/app/~~NlbrfHs5ba3V6liwEbCluA==/com.companyname.net6notifications-oabfrmJ4bWOpNGyqujVDwQ==/lib/arm64/libmonosgen-2.0.so (mono_runtime_invoke+52) (BuildId: 4a5dd4396e8816b7f69881838bd549285213d53b)
      #03 pc 000000000002af5c  /data/app/~~NlbrfHs5ba3V6liwEbCluA==/com.companyname.net6notifications-oabfrmJ4bWOpNGyqujVDwQ==/lib/arm64/libmonodroid.so (xamarin::android::internal::MonodroidRuntime::Java_mono_android_Runtime_register(_JNIEnv*, _jstring*, _jclass*, _jstring*)+276) (BuildId: 0615bbc115b094c7682d18118b1ea0c19b27ba97)
      #04 pc 0000000000440554  /apex/com.android.art/lib64/libart.so (art_quick_generic_jni_trampoline+148) (BuildId: 56e704c544e6c624201be2ab4933e853)
      #05 pc 0000000000209398  /apex/com.android.art/lib64/libart.so (nterp_helper+152) (BuildId: 56e704c544e6c624201be2ab4933e853)
      #06 pc 00000000000deea8  [anon:dalvik-classes.dex extracted in memory from /data/app/~~NlbrfHs5ba3V6liwEbCluA==/com.companyname.net6notifications-oabfrmJ4bWOpNGyqujVDwQ==/base.apk] (crc643c9c45dbcdb37b8d.ReminderWorker.<clinit>+16)
      #07 pc 0000000000436e00  /apex/com.android.art/lib64/libart.so (art_quick_invoke_static_stub+576) (BuildId: 56e704c544e6c624201be2ab4933e853)
      #08 pc 0000000000419360  /apex/com.android.art/lib64/libart.so (art::ClassLinker::InitializeClass(art::Thread*, art::Handle<art::mirror::Class>, bool, bool)+5532) (BuildId: 56e704c544e6c624201be2ab4933e853)
      #09 pc 0000000000603798  /apex/com.android.art/lib64/libart.so (art::Class_classForName(_JNIEnv*, _jclass*, _jstring*, unsigned char, _jobject*) (.__uniq.181829539739573773940154555818377431209)+1120) (BuildId: 56e704c544e6c624201be2ab4933e853)
      #10 pc 00000000004038ec  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (art_jni_trampoline+124)

[akravch]

Any news on this issue? It's gonna affect every app using local notifications, which looks pretty important to me.

[jpobst]

This appears to have been fixed in .NET 7+ per https://github.com/xamarin/xamarin-android/issues/8120.