Bug 36244 - AOT Crash
Summary: AOT Crash
Alias: None
Product: iOS
Classification: Xamarin
Component: Mono runtime / AOT compiler ()
Version: XI 9.2
Hardware: PC Windows
: --- normal
Target Milestone: Untriaged
Assignee: Zoltan Varga
Depends on:
Reported: 2015-11-25 07:38 UTC by Grigory (Playtika)
Modified: 2017-05-18 09:35 UTC (History)
4 users (show)

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

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Description Grigory (Playtika) 2015-11-25 07:38:41 UTC
Crash in runtime. works perfectly

Nov 19 15:33:42 iPad-Anna SMIOSSlotomania[1311] <Warning>: 12:33:42:787|WARN|4|RemoteResourceDownloader|-|RemoteResourceBundle (Id = 295) DOWNLOAD FAILED --> System.ExecutionEngineException: Attempting to JIT compile method 'RemoteResources.RemoteResourceDownloader`2/<DownloadItem>c__async2<int, SM.Shared.Machines.Logic.RemoteResource>:MoveNext ()' while running with --aot-only. See http://docs.xamarin.com/ios/about/limitations for more information.

	  at (wrapper managed-to-native) System.Object:__icall_wrapper_mono_gsharedvt_constrained_call (intptr,intptr,intptr,intptr,intptr)
	  at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine] (System.Runtime.CompilerServices.TStateMachine& stateMachine) <0x101280ad0 + 0x001bb> in <filename unknown>:0 
	  at (wrapper unknown) System.Object:gsharedvt_in ()
	  at (wrapper unknown) System.Object:gsharedvt_out ()
	  at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1[TResult].Start[TStateMachine] (System.Runtime.CompilerServices.TStateMachine& stateMachine) <0x10127efe0 + 0x00063> in <filename unknown>:0 
	  at (wrapper unknown) System.Object:gsharedvt_in ()
	  at (wrapper unknown) System.Object:gsharedvt_out ()
	  at System.Runtime.CompilerServices.AsyncTaskMethodBuilder.Start[TStateMachine] (System.Runtime.CompilerServices.TStateMachine& stateMachine) <0x10127ed20 + 0x00073> in <filename unknown>:0 
	  at (wrapper unknown) System.Object:gsharedvt_in ()
	  at RemoteResources.RemoteResourceDownloader`2[TBundleId,TResource].DownloadItem (RemoteResources.TResource remoteResource, CancellationToken token) <0x10084cac8 + 0x000d3> in <filename unknown>:0 
	  at (wrapper unknown) System.Object:gsharedvt_out ()

Code: https://gist.github.com/Belorus/81e0c3ed019af62b593b
Comment 1 Zoltan Varga 2015-11-25 12:48:38 UTC
Could you attach a complete testcase ?
Comment 2 Grigory (Playtika) 2015-12-15 13:37:46 UTC
Fixed by breaking big method to 3 small ones.
No time to provide isolated repros. I sent you the code if first message. 
I believe bug can be fixed just using crash and code (i do it all the time).

Not closing bug because it still exists, but for anyone who gets this - break complex methods to smaller ones.
Comment 3 Manuel de la Peña [MSFT] 2017-04-10 10:20:50 UTC
@Grigory can you please provide what @zoltan requested? I'd like to be able to test the issue in the current release.
Comment 4 Vincent Dondain [MSFT] 2017-05-18 09:35:50 UTC
We have not received the requested information. If you are still experiencing this issue please provide all the requested information and re-open the bug report. Thanks!