Bug 40718 - Often ExecutionEngineExceptions in sm-g930f - Samsung Galaxy S7
Summary: Often ExecutionEngineExceptions in sm-g930f - Samsung Galaxy S7
Alias: None
Product: Android
Classification: Xamarin
Component: Mono runtime / AOT Compiler ()
Version: unspecified
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Jonathan Pryor
Depends on:
Reported: 2016-04-26 20:11 UTC by Przemysław Raciborski
Modified: 2016-04-26 22:31 UTC (History)
1 user (show)

Is this bug a regression?: ---
Last known good build:

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Description Przemysław Raciborski 2016-04-26 20:11:30 UTC
I often get System.ExecutionEngineException in Samsung Galaxy S7 Device (Insight logs).
Most of logged exceptions are in form of:

null" (that has raised my curiosity - something must be wrong there as even thrown exception is... "wrong")

I thought that might be caused by user-code until I got logged one exception from SM-G930F device:


  at MvvmCross.Droid.Views.MvxAndroidLifetimeMonitor.OnStop (Android.App.Activity activity) <0x7f3e03a660 + 0x00000> in <filename unknown>:0 
  at MvvmCross.Droid.Views.MvxActivityViewExtensions+<>c.<OnViewStop>b__7_0 (IMvxAndroidActivityLifetimeListener listener, Android.App.Activity activity) <0x7f3e03a610 + 0x0003f> in <filename unknown>:0 
  at MvvmCross.Droid.Views.MvxActivityViewExtensions.OnLifetimeEvent (IMvxAndroidView androidView, System.Action`2 report) <0x7f64cc9ca8 + 0x00043> in <filename unknown>:0 
  at MvvmCross.Droid.Views.MvxActivityViewExtensions.OnViewStop (IMvxAndroidView androidView) <0x7f3e03a4d0 + 0x000df> in <filename unknown>:0 
  at MvvmCross.Droid.Views.MvxActivityAdapter.EventSourceOnStopCalled (System.Object sender, System.EventArgs eventArgs) <0x7f3e03a398 + 0x000fb> in <filename unknown>:0 
  at (wrapper delegate-invoke) <Module>:invoke_void_object_EventArgs (object,System.EventArgs)
  at MvvmCross.Platform.Core.MvxDelegateExtensionMethods.Raise (System.EventHandler eventHandler, System.Object sender) <0x7f644d5248 + 0x00037> in <filename unknown>:0 
  at MvvmCross.Droid.Support.V7.AppCompat.MvxEventSourceAppCompatActivity.OnStop () <0x7f3e03a340 + 0x0001b> in <filename unknown>:0 
  at Android.App.Activity.n_OnStop (IntPtr jnienv, IntPtr native__this) <0x7f3e03a2e0 + 0x0003f> in <filename unknown>:0 
  at (wrapper dynamic-method) System.Object:8cf96119-672e-46e5-9a93-c4c02c52e8c2 (intptr,intptr)"

By analysing stacktrace we can see that exception was thrown in "MvvmCross.Droid.Views.MvxAndroidLifetimeMonitor.OnStop (Android.App.Activity activity) <" method.
Problem is: this method is empty ! Check: https://github.com/MvvmCross/MvvmCross/blob/3c735adc534a5df2d4730e9d58a08f7863c30cee/MvvmCross/Droid/Droid/Views/MvxAndroidLifeTimeMonitor.cs
 I think there is a bug in Mono compiler.
Comment 1 Przemysław Raciborski 2016-04-26 20:23:32 UTC
btw. Application was built with Xamarin.Android (beta channel)
Comment 2 Przemysław Raciborski 2016-04-26 20:25:35 UTC
btw part2: Built Application don't use AOT compiler, APK which crashed was targeting all possible CPU/Abis.
Comment 3 Jonathan Pryor 2016-04-26 22:31:10 UTC
This is probably a dupe of Bug #40239, and should be fixed in the next cycle 7 release.