Unity Freezes when I play the game from the editor

Since Unity 2017.2.03f I have experienced random freezes of the editor right after I clicked "Play".
It doesn't happen all the time which makes it very hard to troubleshoot and reproduce. In addition, no errors (i.e compilation errors) are present when the editor freezes. However, the freeze appears to trigger a crash log by Unity and stack trace dump.
I have no clue why that happens, but when I tried to search for the ERROR: SymGetSymFromAddr64 I came across threads which suggested an issue(or bug) with the mono GC.

I'd appreciate if anyone can shed some light on this issue. Last night was the 8th time Unity froze on me for no good reason.

Code (CSharp):

1. ========== OUTPUTING STACK TRACE ==================
2.  
3. 0x00007FFC4B01CFF5 (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\mini\aot-runtime.c:2479] mono_aot_get_cached_class_info
4. 0x00007FFC4B17C459 (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\class.c:4882] mono_class_init
5. 0x00007FFC4B175942 (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\class.c:2937] collect_implemented_interfaces_aux
6. 0x00007FFC4B1812CF (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\class.c:4087] mono_class_setup_vtable_general
7. 0x00007FFC4B1811EE (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\class.c:3622] mono_class_setup_vtable_full
8. 0x00007FFC4B17B53B (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\class.c:2532] mono_class_get_vtable_entry
9. 0x00007FFC4B0228C9 (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\mini\mini-trampolines.c:902] mono_vcall_trampoline
10.   ERROR: SymGetSymFromAddr64, GetLastError: 'The specified module could not be found.' (Address: 0000000010251838)
11.   ERROR: SymGetModuleInfo64, GetLastError: 'A dynamic link library (DLL) initialization routine failed.' (Address: 0000000010251838)
12. 0x0000000010251838 ((<unknown>))
13. 0x00000000141639AC (Mono JIT Code) System.Collections.Generic.Stack`1<T_REF>:Push (T_REF)
14. 0x0000000014163620 (Mono JIT Code) [C:\buildslave\unity\build\Extensions\guisystem\UnityEngine.UI\UI\Core\Utility\ObjectPool.cs:46] UnityEngine.UI.ObjectPool`1<T_REF>:Release (T_REF)
15. 0x00000000141632AD (Mono JIT Code) [C:\buildslave\unity\build\Extensions\guisystem\UnityEngine.UI\UI\Core\Utility\ListPool.cs:20] UnityEngine.UI.ListPool`1<T_REF>:Release (System.Collections.Generic.List`1<T_REF>)
16. 0x0000000013E88ECD (Mono JIT Code) [C:\buildslave\unity\build\Extensions\guisystem\UnityEngine.UI\UI\Core\MaskUtilities.cs:85] UnityEngine.UI.MaskUtilities:GetStencilDepth (UnityEngine.Transform,UnityEngine.Transform)
17. 0x0000000013E87CCE (Mono JIT Code) [C:\buildslave\unity\build\Extensions\guisystem\UnityEngine.UI\UI\Core\MaskableGraphic.cs:71] UnityEngine.UI.MaskableGraphic:GetModifiedMaterial (UnityEngine.Material)
18. 0x0000000013E87330 (Mono JIT Code) [C:\buildslave\unity\build\Extensions\guisystem\UnityEngine.UI\UI\Core\Graphic.cs:247] UnityEngine.UI.Graphic:get_materialForRendering ()
19. 0x0000000013E86CC6 (Mono JIT Code) [C:\buildslave\unity\build\Extensions\guisystem\UnityEngine.UI\UI\Core\Graphic.cs:362] UnityEngine.UI.Graphic:UpdateMaterial ()
20. 0x0000000013E77051 (Mono JIT Code) [C:\buildslave\unity\build\Extensions\guisystem\UnityEngine.UI\UI\Core\Graphic.cs:341] UnityEngine.UI.Graphic:Rebuild (UnityEngine.UI.CanvasUpdate)
21. 0x0000000013E74939 (Mono JIT Code) [C:\buildslave\unity\build\Extensions\guisystem\UnityEngine.UI\UI\Core\CanvasUpdateRegistry.cs:151] UnityEngine.UI.CanvasUpdateRegistry:PerformUpdate ()
22. 0x0000000013E739FD (Mono JIT Code) [C:\buildslave\unity\build\artifacts\generated\common\modules\UI\UICanvasBindings.gen.cs:240] UnityEngine.Canvas:SendWillRenderCanvases ()
23. 0x0000000013E73BAE (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void (object,intptr,intptr,intptr)
24. 0x00007FFC4AF8434A (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\mini\mini-runtime.c:2618] mono_jit_runtime_invoke
25. 0x00007FFC4B188BC7 (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\object.c:2853] do_runtime_invoke
26. 0x00007FFC4B1915CF (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\object.c:2905] mono_runtime_invoke
27. 0x000000014092281C (Unity) scripting_method_invoke
28. 0x0000000140917153 (Unity) ScriptingInvocation::Invoke
29. 0x000000014177A5F6 (Unity) UI::CanvasManager::WillRenderCanvases
30. 0x000000014177A6E1 (Unity) `UI::InitializeCanvasManager'::`21'::UIEventsWillRenderCanvasesRegistrator::Forward
31. 0x00000001405DC891 (Unity) `InitPlayerLoopCallbacks'::`25'::PostLateUpdatePlayerUpdateCanvasesRegistrator::Forward
32. 0x00000001405DB670 (Unity) PlayerLoop
33. 0x00000001410C19E2 (Unity) PlayerLoopController::UpdateScene
34. 0x00000001410CAE5A (Unity) PlayerLoopController::EnterPlayMode
35. 0x00000001410CB6C9 (Unity) PlayerLoopController::SetIsPlaying
36. 0x00000001410CC522 (Unity) Application::TickTimer
37. 0x00000001412D5389 (Unity) MainMessageLoop
38. 0x00000001412D6C44 (Unity) WinMain
39. 0x0000000141DEFD48 (Unity) __tmainCRTStartup
40. 0x00007FFC7F678364 (KERNEL32) BaseThreadInitThunk
41. 0x00007FFC82147091 (ntdll) RtlUserThreadStart
42.  
43. ========== END OF STACKTRACE ===========

 

I am experiencing what I assume is the same issue due to a similar stack trace. Unfortunately, I do not have any solution, but my stack trace is included below in case it helps anyone determine the source of this problem.

Code (CSharp):

1. ========== OUTPUTING STACK TRACE ==================
2.  
3. 0x00007FF815015E78 (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\utils\mono-error.c:190] mono_error_get_message
4. 0x00007FF81506133F (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\class.c:4090] mono_class_setup_vtable_general
5. 0x00007FF8150611EE (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\class.c:3622] mono_class_setup_vtable_full
6. 0x00007FF81505B53B (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\class.c:2532] mono_class_get_vtable_entry
7. 0x00007FF814F028C9 (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\mini\mini-trampolines.c:902] mono_vcall_trampoline
8.   ERROR: SymGetSymFromAddr64, GetLastError: 'The specified module could not be found.' (Address: 0000000024131838)
9.   ERROR: SymGetModuleInfo64, GetLastError: 'A dynamic link library (DLL) initialization routine failed.' (Address: 0000000024131838)
10. 0x0000000024131838 ((<unknown>))
11. 0x000000000C0B35EC (Mono JIT Code) System.Collections.Generic.Stack`1<T_REF>:Push (T_REF)
12. 0x00000000104B9350 (Mono JIT Code) [C:\buildslave\unity\build\Extensions\guisystem\UnityEngine.UI\UI\Core\Utility\ObjectPool.cs:46] UnityEngine.UI.ObjectPool`1<T_REF>:Release (T_REF)
13. 0x000000006E4A1072 (Mono JIT Code) [C:\buildslave\unity\build\Extensions\guisystem\UnityEngine.UI\UI\Core\Utility\ListPool.cs:20] UnityEngine.UI.ListPool`1<UnityEngine.Color32>:Release (System.Collections.Generic.List`1<UnityEngine.Color32>)
14. 0x000000006E4A0AA7 (Mono JIT Code) [C:\buildslave\unity\build\Extensions\guisystem\UnityEngine.UI\UI\Core\Utility\VertexHelper.cs:106] UnityEngine.UI.VertexHelper:Dispose ()
15. 0x000000006E4A07C1 (Mono JIT Code) TMPro.TMP_InputField:OnFillVBO (UnityEngine.Mesh)
16. 0x000000006E44CDED (Mono JIT Code) TMPro.TMP_InputField:UpdateGeometry ()
17. 0x000000006E4438D1 (Mono JIT Code) TMPro.TMP_InputField:Rebuild (UnityEngine.UI.CanvasUpdate)
18. 0x0000000010EA82E9 (Mono JIT Code) [C:\buildslave\unity\build\Extensions\guisystem\UnityEngine.UI\UI\Core\CanvasUpdateRegistry.cs:151] UnityEngine.UI.CanvasUpdateRegistry:PerformUpdate ()
19. 0x000000006E451ECF (Mono JIT Code) (wrapper delegate-invoke) <Module>:invoke_void ()
20. 0x0000000010EA76FD (Mono JIT Code) [C:\buildslave\unity\build\artifacts\generated\common\modules\UI\UICanvasBindings.gen.cs:240] UnityEngine.Canvas:SendWillRenderCanvases ()
21. 0x000000006E451A3E (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void (object,intptr,intptr,intptr)
22. 0x00007FF814E6434A (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\mini\mini-runtime.c:2618] mono_jit_runtime_invoke
23. 0x00007FF815068BC7 (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\object.c:2853] do_runtime_invoke
24. 0x00007FF8150715CF (mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\object.c:2905] mono_runtime_invoke
25. 0x000000014091D03C (Unity) scripting_method_invoke
26. 0x00000001409119C3 (Unity) ScriptingInvocation::Invoke
27. 0x0000000141770546 (Unity) UI::CanvasManager::WillRenderCanvases
28. 0x0000000141770631 (Unity) `UI::InitializeCanvasManager'::`21'::UIEventsWillRenderCanvasesRegistrator::Forward
29. 0x00000001405DAF91 (Unity) `InitPlayerLoopCallbacks'::`25'::PostLateUpdatePlayerUpdateCanvasesRegistrator::Forward
30. 0x00000001405D9DD0 (Unity) PlayerLoop
31. 0x00000001410B9862 (Unity) PlayerLoopController::UpdateScene
32. 0x00000001410C3077 (Unity) PlayerLoopController::EnterPlayMode
33. 0x00000001410C3829 (Unity) PlayerLoopController::SetIsPlaying
34. 0x00000001410C4130 (Unity) Application::TickTimer
35. 0x00000001412CC349 (Unity) MainMessageLoop
36. 0x00000001412CDC04 (Unity) WinMain
37. 0x0000000141DE45A8 (Unity) __tmainCRTStartup
38. 0x00007FF850A02774 (KERNEL32) BaseThreadInitThunk
39. 0x00007FF8530F0D51 (ntdll) RtlUserThreadStart
40.  
41. ========== END OF STACKTRACE ===========

 

Hi
Do you mind if I ask you which mono run you are using? the experimental .net 4.6 or the stable one.
I am 100% certain, but I started experiencing this issue when I switched over to .net 4.6

 

I am experiencing this problem on .NET 4.6.

 

Yesterday I published a bug report -> https://issuetracker.unity3d.com/is...ering-slash-leaving-play-mode-on-mono-4-dot-6
And I wrote a lot about this bug here -> https://forum.unity.com/threads/frequent-crashes.489173/

 

Thanks for posting that bug report, CriDos. I've voted on it and added my two cents in the comments.

I also discovered another bug report that contains an identical stack trace as mine, but I would assume that the issue is closely related to your, rob8861. https://issuetracker.unity3d.com/issues/crash-when-entering-playmode

 

I'm getting a similar situation in 2017.1 after updating a project from 5.3 it consistently freezes after hitting the play button.
No crash log, no compile errors and I can successfully build and run the project on the desktop as an exe just not via the editor.
I've tried completely rebuilding the library too, nothing seems to fix it.
I was getting issues that were related to having the profiler running but killing that doesn't seem to help either.