Unity Issue Tracker - Task of generic struct crashes at mono_metadata_class_equal when entering play mode second time

Fixed in 2020.2.X

Votes

9

Found in

2018.3.0a1

2018.3.1f1

2019.1.0a1

2019.2.0a1

Issue ID

1122719

Regression

No

Task of generic struct crashes at mono_metadata_class_equal when entering play mode second time

Mono

Jan 31, 2019

Steps to reproduce:
1. Download the attached project and open "TestScene" scene
2. Enter play mode and wait 5 seconds
3. Exit play mode
4. repeat 2 - 3 step several times

Results: Editor crashes when entering play mode 2nd - 6th time.

Reproduced with: 2019.2.0a4, 2019.1.0b2, 2018.3.5f1

========== OUTPUTTING STACK TRACE ==================

0x00007FFCE594EE21 (mono-2.0-bdwgc) [c:\users\builduser\builds\buzqgkf5\0\vm\mono\mono\metadata\metadata.c:5316] mono_metadata_class_equal
0x00007FFCE594C864 (mono-2.0-bdwgc) [c:\users\builduser\builds\buzqgkf5\0\vm\mono\mono\metadata\metadata.c:5151] _mono_metadata_generic_class_equal
0x00007FFCE5AD2151 (mono-2.0-bdwgc) [c:\users\builduser\builds\buzqgkf5\0\vm\mono\mono\mini\mini-generic-sharing.c:3450] shared_gparam_equal
0x00007FFCE58C2649 (mono-2.0-bdwgc) [c:\users\builduser\builds\buzqgkf5\0\vm\mono\mono\eglib\ghashtable.c:311] monoeg_g_hash_table_lookup
0x00007FFCE5ACF684 (mono-2.0-bdwgc) [c:\users\builduser\builds\buzqgkf5\0\vm\mono\mono\mini\mini-generic-sharing.c:3488] mini_get_shared_gparam
0x00007FFCE5ACC462 (mono-2.0-bdwgc) [c:\users\builduser\builds\buzqgkf5\0\vm\mono\mono\mini\mini-generic-sharing.c:3588] get_shared_inst
0x00007FFCE5ACF90A (mono-2.0-bdwgc) [c:\users\builduser\builds\buzqgkf5\0\vm\mono\mono\mini\mini-generic-sharing.c:3666] mini_get_shared_method_full
0x00007FFCE59F1101 (mono-2.0-bdwgc) [c:\users\builduser\builds\buzqgkf5\0\vm\mono\mono\mini\seq-points.c:261] mono_get_seq_points
0x00007FFCE59F1035 (mono-2.0-bdwgc) [c:\users\builduser\builds\buzqgkf5\0\vm\mono\mono\mini\seq-points.c:310] mono_find_prev_seq_point_for_native_offset
0x00007FFCE5AC53F8 (mono-2.0-bdwgc) [c:\users\builduser\builds\buzqgkf5\0\vm\mono\mono\mini\mini-exceptions.c:1008] ves_icall_get_trace
0x000001EA2CD57A29 (Mono JIT Code) (wrapper managed-to-native) System.Diagnostics.StackTrace:get_trace (System.Exception,int,bool)
0x000001EA2CD578B3 (Mono JIT Code) System.Diagnostics.StackTrace:.ctor (System.Exception,int,bool)
0x000001EA2CD5FD03 (Mono JIT Code) System.Diagnostics.StackTrace:.ctor (System.Exception,bool)
0x000001EA2CD5FB83 (Mono JIT Code) System.Environment:GetStackTrace (System.Exception,bool)
0x000001EA2CD5F943 (Mono JIT Code) System.Exception:GetStackTrace (bool)
0x000001EA2CD5F09B (Mono JIT Code) System.Exception:ToString (bool,bool)
0x000001EA2CD5EB0B (Mono JIT Code) System.Exception:ToString ()
0x000001EA2CD51B13 (Mono JIT Code) [C:\Users\<...>t\Assets\Test.cs:56] Test/<RunAsync>d__7:MoveNext ()
0x000001EA2CD51552 (Mono JIT Code) System.Runtime.CompilerServices.AsyncTaskMethodBuilder:Start<TStateMachine_REF> (TStateMachine_REF&)
0x000001EA2CD3EC63 (Mono JIT Code) Test:RunAsync (System.Threading.CancellationToken)
0x000001EA2CD4F5A3 (Mono JIT Code) [C:\Users\<...>\Assets\Test.cs:29] Test/<Awake>d__4:MoveNext ()
0x000001EA2CD4EDF2 (Mono JIT Code) System.Runtime.CompilerServices.AsyncVoidMethodBuilder:Start<TStateMachine_REF> (TStateMachine_REF&)
0x000001EA2CD4E40B (Mono JIT Code) Test:Awake ()
0x000001EA2CF73D38 (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void__this__ (object,intptr,intptr,intptr)
0x00007FFCE59EC53B (mono-2.0-bdwgc) [c:\users\builduser\builds\buzqgkf5\0\vm\mono\mono\mini\mini-runtime.c:2809] mono_jit_runtime_invoke
0x00007FFCE5971F62 (mono-2.0-bdwgc) [c:\users\builduser\builds\buzqgkf5\0\vm\mono\mono\metadata\object.c:2921] do_runtime_invoke
0x00007FFCE597AF5F (mono-2.0-bdwgc) [c:\users\builduser\builds\buzqgkf5\0\vm\mono\mono\metadata\object.c:2968] mono_runtime_invoke
0x00007FF7A9DC9C02 (Unity) scripting_method_invoke
0x00007FF7A9DC3D91 (Unity) ScriptingInvocation::Invoke
0x00007FF7A9DC400E (Unity) ScriptingInvocation::InvokeChecked
0x00007FF7A9E23642 (Unity) SerializableManagedRef::CallMethod
0x00007FF7A9D7F67D (Unity) MonoBehaviour::CallAwake
0x00007FF7A9D7D654 (Unity) MonoBehaviour::AddToManager
0x00007FF7A9D7E2DC (Unity) MonoBehaviour::AwakeFromLoad
0x00007FF7A84EFF97 (Unity) AwakeFromLoadQueue::InvokePersistentManagerAwake
0x00007FF7A84F0BB0 (Unity) AwakeFromLoadQueue::PersistentManagerAwakeFromLoad
0x00007FF7A98DE658 (Unity) LoadSceneOperation::CompleteAwakeSequence
0x00007FF7A98DF325 (Unity) LoadSceneOperation::IntegrateMainThread
0x00007FF7A98E2A0B (Unity) PreloadManager::UpdatePreloadingSingleStep
0x00007FF7A98E3099 (Unity) PreloadManager::WaitForAllAsyncOperationsToComplete
0x00007FF7A7F9C007 (Unity) EditorSceneManager::RestoreSceneBackups
0x00007FF7A8526BC8 (Unity) PlayerLoopController::EnterPlayMode
0x00007FF7A8537B20 (Unity) PlayerLoopController::SetIsPlaying
0x00007FF7A853A878 (Unity) Application::TickTimer
0x00007FF7A8807F93 (Unity) MainMessageLoop
0x00007FF7A88116D6 (Unity) WinMain
0x00007FF7AB33CA02 (Unity) __scrt_common_main_seh
0x00007FFD2A387E94 (KERNEL32) BaseThreadInitThunk
0x00007FFD2AE0A251 (ntdll) RtlUserThreadStart

========== END OF STACKTRACE ===========

Resolution Note (fix version 2020.2):

Fixed locking in mono_get_seq_points (). This fixes an inconsistent crash in g_hash_table_lookup.

Comments (1)

MathijsF

Jun 24, 2019 13:52

We're struggling with this issue as well. Currently using UniRx.Async as an alternative, but that has its own issues.

You mention a test project, but I can't download that, are only Unity employees allowed that? I'd love to take a look at it to see if it's the same issue that we're having.

Search Issue Tracker

9