Android app bundle (.aab) crashes on startup when using Android 9.0 emulator

[codympearson]

Steps to Reproduce

1. Set your Android project as the startup project
2. Select the Release configuration
3. In your Android project settings, under Android Build > General, set the package format to aab
4. Under Advanced, ensure x86 is enabled as a supported ABI
5. Build and deploy your app to a simulator running Android 9.0 (Pie) - x86
6. The app freezes on the splash screen (before OnCreate)
7. Logs show the app is throwing a mono exception, crashing, and restarting

As a note, a crash does not occur on Android 7.1, 8.1, and 10.0.

Expected Behavior

The app does not crash on launch when using aab on Android 9.0.

Actual Behavior

The app crashes on Android 9.0 after a mono exception and appears to freeze on the launch screen.

Version Information

=== Visual Studio Community 2019 for Mac ===

Version 8.6.5 (build 23)
Installation UUID: 569a2032-b97f-4417-8a14-45ffe1b65f41
GTK+ 2.24.23 (Raleigh theme)
Xamarin.Mac 6.18.0.23 (d16-6 / 088c73638)

Package version: 610000104

=== Mono Framework MDK ===

Runtime:
Mono 6.10.0.104 (2019-12/5d03a6fe116) (64-bit)
Package version: 610000104

=== Roslyn (Language Service) ===

3.6.0-3.20210.9+4eafdcb1bcbd8d3573f2ba6065e56d9b9ce4f8a3

=== NuGet ===

Version: 5.6.0.6591

=== .NET Core SDK ===

SDK: /usr/local/share/dotnet/sdk/3.1.301/Sdks
SDK Versions:
3.1.301
3.1.300
3.1.200
3.1.101
3.1.100
3.0.101
3.0.100
2.1.701
MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/6.10.0/lib/mono/msbuild/Current/bin/Sdks

=== .NET Core Runtime ===

Runtime: /usr/local/share/dotnet/dotnet
Runtime Versions:
3.1.5
3.1.4
3.1.2
3.1.1
3.1.0
3.0.1
3.0.0
2.1.19
2.1.18
2.1.16
2.1.15
2.1.14
2.1.13
2.1.12

=== Xamarin.Profiler ===

Version: 1.6.12.29
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler

=== Updater ===

Version: 11

=== Xamarin.Android ===

Version: 10.3.1.4 (Visual Studio Community)
Commit: xamarin-android/d16-6/3a10de9
Android SDK: /Users/cpearson/Library/Developer/Xamarin/android-sdk-macosx
Supported Android versions:
7.1 (API level 25)
8.1 (API level 27)

SDK Tools Version: 26.1.1
SDK Platform Tools Version: 29.0.5
SDK Build Tools Version: 29.0.2

Build Information:
Mono: 165f4b0
Java.Interop: xamarin/java.interop/d16-6@2cab35c
ProGuard: xamarin/proguard@905836d
SQLite: xamarin/sqlite@49232bc
Xamarin.Android Tools: xamarin/xamarin-android-tools/d16-6@bfb66f3

=== Microsoft OpenJDK for Mobile ===

Java SDK: /Users/cpearson/Library/Developer/Xamarin/jdk/microsoft_dist_openjdk_1.8.0.25
1.8.0-25
Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL

=== Android SDK Manager ===

Version: 16.6.0.50
Hash: 5901879
Branch: remotes/origin/d16-6
Build date: 2020-06-10 22:42:50 UTC

=== Android Device Manager ===

Version: 16.6.0.96
Hash: 6e8b80b
Branch: remotes/origin/d16-6
Build date: 2020-06-10 22:43:28 UTC

=== Xamarin Designer ===

Version: 16.6.0.329
Hash: d4f8bcd13
Branch: remotes/origin/d16-6
Build date: 2020-04-24 02:16:02 UTC

=== Apple Developer Tools ===

Xcode 11.5 (16139)
Build 11E608c

=== Xamarin.Mac ===

Xamarin.Mac not installed. Can't find /Library/Frameworks/Xamarin.Mac.framework/Versions/Current/Version.

=== Xamarin.iOS ===

Version: 13.18.2.1 (Visual Studio Community)
Hash: 29c4ea731
Branch: d16-6
Build date: 2020-05-26 17:03:05-0400

=== Build Information ===

Release ID: 806050023
Git revision: 5289d413b99fddfc20b4ecf3e445ccb822213427
Build date: 2020-06-18 12:08:30-04
Build branch: release-8.6
Xamarin extensions: 5289d413b99fddfc20b4ecf3e445ccb822213427

=== Operating System ===

Mac OS X 10.15.4
Darwin 19.4.0 Darwin Kernel Version 19.4.0
Wed Mar 4 22:28:40 PST 2020
root:xnu-6153.101.6~15/RELEASE_X86_64 x86_64

Log File

log.txt

Repro

Repro.zip
log2.txt

[jonathanpeppers]

Maybe @grendello or @brendanzagaeski have seen something like this:

06-24 10:33:18.622: E/mono(3350): Unhandled Exception:
06-24 10:33:18.622: E/mono(3350): System.ArgumentNullException: Value cannot be null.
06-24 10:33:18.622: E/mono(3350): Parameter name: key
06-24 10:33:18.622: E/mono(3350):   at System.Collections.Generic.Dictionary`2[TKey,TValue].FindEntry (TKey key) [0x00008] in <3c2fd5b954804d4fbe58155f333ab55b>:0 
06-24 10:33:18.622: E/mono(3350):   at System.Collections.Generic.Dictionary`2[TKey,TValue].TryGetValue (TKey key, TValue& value) [0x00000] in <3c2fd5b954804d4fbe58155f333ab55b>:0 
06-24 10:33:18.622: E/mono(3350):   at Java.Interop.TypeManager.RegisterType (System.String java_class, System.Type t) [0x0001c] in <cab002740c754a61953d6b361abe0c29>:0 
06-24 10:33:18.622: E/mono(3350):   at Android.Runtime.JNIEnv.RegisterJniNatives (System.IntPtr typeName_ptr, System.Int32 typeName_len, System.IntPtr jniClass, System.IntPtr methods_ptr, System.Int32 methods_len) [0x0005d] in <cab002740c754a61953d6b361abe0c29>:0 
06-24 10:33:18.623: E/mono-rt(3350): [ERROR] FATAL UNHANDLED EXCEPTION: System.ArgumentNullException: Value cannot be null.
06-24 10:33:18.623: E/mono-rt(3350): Parameter name: key
06-24 10:33:18.623: E/mono-rt(3350):   at System.Collections.Generic.Dictionary`2[TKey,TValue].FindEntry (TKey key) [0x00008] in <3c2fd5b954804d4fbe58155f333ab55b>:0 
06-24 10:33:18.623: E/mono-rt(3350):   at System.Collections.Generic.Dictionary`2[TKey,TValue].TryGetValue (TKey key, TValue& value) [0x00000] in <3c2fd5b954804d4fbe58155f333ab55b>:0 
06-24 10:33:18.623: E/mono-rt(3350):   at Java.Interop.TypeManager.RegisterType (System.String java_class, System.Type t) [0x0001c] in <cab002740c754a61953d6b361abe0c29>:0 
06-24 10:33:18.623: E/mono-rt(3350):   at Android.Runtime.JNIEnv.RegisterJniNatives (System.IntPtr typeName_ptr, System.Int32 typeName_len, System.IntPtr jniClass, System.IntPtr methods_ptr, System.Int32 methods_len) [0x0005d] in <cab002740c754a61953d6b361abe0c29>:0 

Is this related to typemaps?

I don't know why using an app bundle on Android 9.0 would cause this.

@codympearson do you see this problem on any app (even hello world) or just your app?

[codympearson]

Hi @jonathanpeppers, I have not tried with a hello world app, but I have seen this issue in two separate Xamarin.Forms applications I am working on currently (one significantly less complex than the other). If I use AAB in debug, both apps run on Android 9.0. Switching to release, AAB crashes on Android 9.0. I have ruled out the AndroidX packages, as the issue occurs on one project that has not migrated yet.

[jonathanpeppers]

@codympearson I tried your steps above with the Xamarin.Forms Shell template and it worked for me on an Android 9.0 x86 emulator.

Is there something specific in your app causing this? Are you able to create a new project that shows the same problem?

If you enable Mono debug logging for the running emulator via:

adb shell setprop debug.mono.log debug,assembly,timing

And relaunch the app, it might give more information in the log. Attach that here, thanks!

[codympearson]

@jonathanpeppers I've uploaded a repro project and log with the requested mono debug logging at the bottom of my post. I created a blank Xamarin.Forms app with Xamarin.Forms 4.6.0, switched the Android project to use AAB in release, ran it, and was able to reproduce the crash. Thanks for looking into this! Here's the interesting piece:

07-09 14:54:08.806: I/ActivityManager(1918): START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.ostusa.app/crc64a17eccbbc6018201.MainActivity bnds=[37,681][238,979]} from uid 10006
07-09 14:54:08.815: W/audio_hw_generic(1640): Not supplying enough data to HAL, expected position 307008 , only wrote 306720
07-09 14:54:08.832: W/ActivityThread(14126): handleWindowVisibility: no activity for token android.os.BinderProxy@439547c
07-09 14:54:08.860: D/gralloc_ranchu(1650): gralloc_alloc: Creating ashmem region of size 9334784
07-09 14:54:08.919: D/monodroid-assembly(14126): typemap: MVID [E69730C8-3F3C-41A1-B2C9-CC70E17168E1] maps to assembly Xamarin.Forms.Platform.Android, looking for token 33554467 (0x2000023), table index 35
07-09 14:54:08.919: D/monodroid-assembly(14126): typemap: type with token 33554467 (0x2000023) in module {E69730C8-3F3C-41A1-B2C9-CC70E17168E1} (Xamarin.Forms.Platform.Android) corresponds to Java type 'crc643f46942d9dd1fff9/FormsAppCompatActivity'
07-09 14:54:08.919: I/monodroid-timing(14126): Typemap.managed_to_java: end, total time; elapsed: 0s:0::470665
07-09 14:54:08.946: D/gralloc_ranchu(1650): gralloc_alloc: Creating ashmem region of size 9334784
07-09 14:54:08.967: W/audio_hw_generic(1640): Hardware backing HAL too slow, could only write 0 of 720 frames
07-09 14:54:09.162: I/chatty(1640): uid=1041(audioserver) writer identical 13 lines
07-09 14:54:09.176: W/audio_hw_generic(1640): Hardware backing HAL too slow, could only write 0 of 720 frames
07-09 14:54:09.182: E/mono(14126): Unhandled Exception:
07-09 14:54:09.182: E/mono(14126): System.ArgumentNullException: Value cannot be null.
07-09 14:54:09.182: E/mono(14126): Parameter name: key
07-09 14:54:09.182: E/mono(14126):   at System.Collections.Generic.Dictionary`2[TKey,TValue].FindEntry (TKey key) [0x00008] in <bd3bbca1bea44240800c6853da0ea670>:0 
07-09 14:54:09.182: E/mono(14126):   at System.Collections.Generic.Dictionary`2[TKey,TValue].TryGetValue (TKey key, TValue& value) [0x00000] in <bd3bbca1bea44240800c6853da0ea670>:0 
07-09 14:54:09.182: E/mono(14126):   at Java.Interop.TypeManager.RegisterType (System.String java_class, System.Type t) [0x0001c] in <4b06b8846e604735b7bb5ae66ad98f56>:0 
07-09 14:54:09.182: E/mono(14126):   at Android.Runtime.JNIEnv.RegisterJniNatives (System.IntPtr typeName_ptr, System.Int32 typeName_len, System.IntPtr jniClass, System.IntPtr methods_ptr, System.Int32 methods_len) [0x0005d] in <4b06b8846e604735b7bb5ae66ad98f56>:0 
07-09 14:54:09.192: W/audio_hw_generic(1640): Hardware backing HAL too slow, could only write 0 of 720 frames
07-09 14:54:09.194: E/mono-rt(14126): [ERROR] FATAL UNHANDLED EXCEPTION: System.ArgumentNullException: Value cannot be null.
07-09 14:54:09.194: E/mono-rt(14126): Parameter name: key
07-09 14:54:09.194: E/mono-rt(14126):   at System.Collections.Generic.Dictionary`2[TKey,TValue].FindEntry (TKey key) [0x00008] in <bd3bbca1bea44240800c6853da0ea670>:0 
07-09 14:54:09.194: E/mono-rt(14126):   at System.Collections.Generic.Dictionary`2[TKey,TValue].TryGetValue (TKey key, TValue& value) [0x00000] in <bd3bbca1bea44240800c6853da0ea670>:0 
07-09 14:54:09.194: E/mono-rt(14126):   at Java.Interop.TypeManager.RegisterType (System.String java_class, System.Type t) [0x0001c] in <4b06b8846e604735b7bb5ae66ad98f56>:0 
07-09 14:54:09.194: E/mono-rt(14126):   at Android.Runtime.JNIEnv.RegisterJniNatives (System.IntPtr typeName_ptr, System.Int32 typeName_len, System.IntPtr jniClass, System.IntPtr methods_ptr, System.Int32 methods_len) [0x0005d] in <4b06b8846e604735b7bb5ae66ad98f56>:0 
07-09 14:54:09.207: W/audio_hw_generic(1640): Hardware backing HAL too slow, could only write 0 of 720 frames
07-09 14:54:09.223: I/chatty(1640): uid=1041(audioserver) writer identical 1 line
07-09 14:54:09.237: W/audio_hw_generic(1640): Hardware backing HAL too slow, could only write 0 of 720 frames
07-09 14:54:09.242: D/EGL_emulation(2073): eglMakeCurrent: 0xdd6052a0: ver 3 0 (tinfo 0xdd603410)
07-09 14:54:09.253: W/audio_hw_generic(1640): Hardware backing HAL too slow, could only write 0 of 720 frames
07-09 14:54:09.255: D/EGL_emulation(2073): eglMakeCurrent: 0xdd6052a0: ver 3 0 (tinfo 0xdd603410)
07-09 14:54:09.256: I/GnssLocationProvider(1918): WakeLock acquired by sendMessage(REPORT_SV_STATUS, 0, com.android.server.location.GnssLocationProvider$SvStatusInfo@d906a81)
07-09 14:54:09.256: I/GnssLocationProvider(1918): WakeLock released by handleMessage(REPORT_SV_STATUS, 0, com.android.server.location.GnssLocationProvider$SvStatusInfo@d906a81)
07-09 14:54:09.261: D/EGL_emulation(2073): eglMakeCurrent: 0xdd6052a0: ver 3 0 (tinfo 0xdd603410)
07-09 14:54:09.263: I/ActivityManager(1918): Process com.ostusa.app (pid 14126) has died: fore TOP 
07-09 14:54:09.263: W/libprocessgroup(1918): kill(-14126, 9) failed: No such process

[jonathanpeppers]

Thanks, @codympearson I can reproduce the bug above now.

@grendello when I do a diff between an .apk and the .aab the only file I've found that differs is libxamarin-app.so:

libxamarin-app.so.zip

Can you tell if there is something odd in here? The .NET assemblies and classes.dex are identical.

[grendello]

@jonathanpeppers the libxamarin-app.so binaries are identical except for the different build id, which you noticed on Slack. The type maps are identical.

[jonathanpeppers]

After more testing, we can reproduce this issue in a "hello world" app:

https://github.com/xamarin/xamarin-android/tree/master/samples/HelloWorld

If you add <application android:extractNativeLibs="false" to AndroidManifest.xml. App bundles happen to use this setting.

It seems to only occur on an x86 Android 9.0 emulator, the x86_64 emulator works.