error compiler when play mode on unity 5.6 9b

i get errors in console like:

• Assertion at ..\mono\mini\unwind.c:620, condition `cfa_reg != -1' not met and All compiler errors have to be fixed before you can enter playmode! 0x000000014178602B (Unity) StackWalker::GetCurrentCallstack 0x0000000141787CDF (Unity) StackWalker::ShowCallstack 0x0000000141761910 (Unity) GetStacktrace 0x0000000140D2B52B (Unity) DebugStringToFile 0x0000000140D2BD0C (Unity) DebugStringToFile 0x00000001413E54D2 (Unity) DebugLogHandler_CUSTOM_Internal_Log 0x000000004459864B (Mono JIT Code) (wrapper managed-to-native) UnityEngine.DebugLogHandler:Internal_Log (UnityEngine.LogType,string,UnityEngine.Object) 0x0000000044598534 (Mono JIT Code) [DebugLogHandler.cs:10] UnityEngine.DebugLogHandler:LogFormat (UnityEngine.LogType,UnityEngine.Object,string,object[]) 0x0000000044597EC5 (Mono JIT Code) [Logger.cs:42] UnityEngine.Logger:Log (UnityEngine.LogType,object) 0x0000000044597703 (Mono JIT Code) [DebugBindings.gen.cs:122] UnityEngine.Debug:LogError (object) 0x000000004454E13D (Mono JIT Code) [SceneView.cs:2458] UnityEditor.SceneView:ShowNotification (string) 0x000000004454D854 (Mono JIT Code) [SceneView.cs:2464] UnityEditor.SceneView:ShowCompileErrorNotification () 0x00000000009E0A8E (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void (object,intptr,intptr,intptr) 0x00007FFBA9395703 (mono) [mini.c:4937] mono_jit_runtime_invoke 0x00007FFBA92E8425 (mono) [object.c:2623] mono_runtime_invoke 0x00000001401A8C83 (Unity) mono_runtime_invoke_profiled 0x0000000141044FBB (Unity) CallStaticMonoMethod 0x0000000141047377 (Unity) CallStaticMonoMethod 0x000000014170A9D7 (Unity) Application::SetIsPlaying 0x000000014170B593 (Unity) Application::TickTimer 0x00000001417D635C (Unity) CrashCallback 0x00000001417D7FA4 (Unity) WinMain 0x0000000141ABC494 (Unity) strnlen 0x00007FFBDF648364 (KERNEL32) BaseThreadInitThunk 0x00007FFBE1EE5E91 (ntdll) RtlUserThreadStart