mono_threads_state_poll_with_info crashes with error: Cannot transition thread from STATE_BLOCKING with STATE_POLL

I ran into this error today while running on the latest macOS (10.15.2). I continually run into this error and wonder if anyone know what causes it and whether there is a way to recover. This error makes it impossible to debug since it just keeps crashing with these native exceptions.

```
2020-01-22 15:17:08.511 iCircuit2[1064:17218] error: Cannot transition thread 0x70000baae000 from STATE_BLOCKING with STATE_POLL

=================================================================
	Native Crash Reporting
=================================================================
Got a SIGABRT while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

=================================================================
	Native stacktrace:
=================================================================
	0x10e8c88f8 - /Users/fak/Dropbox/Projects/Circuit2/CircuitMac/bin/Debug/iCircuit2.app/Contents/MacOS/iCircuit2 : mono_dump_native_crash_info
	0x10e8bc115 - /Users/fak/Dropbox/Projects/Circuit2/CircuitMac/bin/Debug/iCircuit2.app/Contents/MacOS/iCircuit2 : mono_handle_native_crash
	0x10e8c7e6b - /Users/fak/Dropbox/Projects/Circuit2/CircuitMac/bin/Debug/iCircuit2.app/Contents/MacOS/iCircuit2 : sigabrt_signal_handler
	0x7fff7074942d - /usr/lib/system/libsystem_platform.dylib : _sigtramp
	0x70000baab008 - Unknown
	0x7fff7061ea1c - /usr/lib/system/libsystem_c.dylib : abort
	0x10e7dbc60 - /Users/fak/Dropbox/Projects/Circuit2/CircuitMac/bin/Debug/iCircuit2.app/Contents/MacOS/iCircuit2 : _ZL12log_callbackPKcS0_S0_iPv
	0x10eb06e35 - /Users/fak/Dropbox/Projects/Circuit2/CircuitMac/bin/Debug/iCircuit2.app/Contents/MacOS/iCircuit2 : monoeg_g_logv_nofree
	0x10eb06ef2 - /Users/fak/Dropbox/Projects/Circuit2/CircuitMac/bin/Debug/iCircuit2.app/Contents/MacOS/iCircuit2 : monoeg_g_log
	0x10eaf7546 - /Users/fak/Dropbox/Projects/Circuit2/CircuitMac/bin/Debug/iCircuit2.app/Contents/MacOS/iCircuit2 : mono_threads_transition_state_poll
	0x10eaf526a - /Users/fak/Dropbox/Projects/Circuit2/CircuitMac/bin/Debug/iCircuit2.app/Contents/MacOS/iCircuit2 : mono_threads_state_poll_with_info
	0x160efd623 - Unknown
	0x11c323db3 - Unknown
	0x15287470d - Unknown
	0x147c7eda7 - Unknown
	0x147c7e0aa - Unknown
	0x10e8d3167 - /Users/fak/Dropbox/Projects/Circuit2/CircuitMac/bin/Debug/iCircuit2.app/Contents/MacOS/iCircuit2 : mono_jit_runtime_invoke
	0x10ea0ec47 - /Users/fak/Dropbox/Projects/Circuit2/CircuitMac/bin/Debug/iCircuit2.app/Contents/MacOS/iCircuit2 : mono_runtime_invoke_checked
	0x10ea1358e - /Users/fak/Dropbox/Projects/Circuit2/CircuitMac/bin/Debug/iCircuit2.app/Contents/MacOS/iCircuit2 : mono_runtime_invoke
	0x10e7e5a62 - /Users/fak/Dropbox/Projects/Circuit2/CircuitMac/bin/Debug/iCircuit2.app/Contents/MacOS/iCircuit2 : xamarin_invoke_trampoline
	0x10e7e6f5b - /Users/fak/Dropbox/Projects/Circuit2/CircuitMac/bin/Debug/iCircuit2.app/Contents/MacOS/iCircuit2 : xamarin_arch_trampoline
	0x10e7e8162 - /Users/fak/Dropbox/Projects/Circuit2/CircuitMac/bin/Debug/iCircuit2.app/Contents/MacOS/iCircuit2 : xamarin_x86_64_common_trampoline
	0x7fff450e3a78 - /System/Library/Frameworks/SceneKit.framework/Versions/A/SceneKit : -[SCNRenderer _update:]
	0x7fff450e6482 - /System/Library/Frameworks/SceneKit.framework/Versions/A/SceneKit : -[SCNRenderer _drawSceneWithNewRenderer:]
	0x7fff450e6a41 - /System/Library/Frameworks/SceneKit.framework/Versions/A/SceneKit : -[SCNRenderer _drawScene:]
	0x7fff450e6f46 - /System/Library/Frameworks/SceneKit.framework/Versions/A/SceneKit : -[SCNRenderer _drawAtTime:]
	0x7fff450d3fc3 - /System/Library/Frameworks/SceneKit.framework/Versions/A/SceneKit : -[SCNView _drawAtTime:WithContext:]
	0x7fff450d38ee - /System/Library/Frameworks/SceneKit.framework/Versions/A/SceneKit : -[SCNView SCN_displayLinkCallback:]
	0x7fff4506e25c - /System/Library/Frameworks/SceneKit.framework/Versions/A/SceneKit : __69-[NSObject(SCN_DisplayLinkExtensions) SCN_setupDisplayLinkWithQueue:]_block_invoke
	0x7fff45160ad8 - /System/Library/Frameworks/SceneKit.framework/Versions/A/SceneKit : __36-[SCNDisplayLink _callbackWithTime:]_block_invoke.13
```

### Steps to Reproduce

1. Use SceneKit
2. Implement code in the scene renderer update function

### Expected Behavior

No crash

### Actual Behavior

Above mono error.

### Environment

```
=== Visual Studio Community 2019 for Mac ===

Version 8.4.2 (build 59)
Installation UUID: 4ba352e1-73e8-4dab-a9db-28012ca05af8
	GTK+ 2.24.23 (Raleigh theme)
	Xamarin.Mac 5.16.1.25 (issue-7441-d16-3-vsmac / 881172e73)

	Package version: 606000155

=== Mono Framework MDK ===

Runtime:
	Mono 6.6.0.155 (2019-08/296a9afdb24) (64-bit)
	Package version: 606000155

=== Roslyn (Language Service) ===

3.4.0-beta4-19562-05+ff930dec4565e2bc424ad3bf3e22ecb20542c87d

=== NuGet ===

Version: 5.3.0.6192

=== .NET Core SDK ===

SDK: /usr/local/share/dotnet/sdk/3.1.101/Sdks
SDK Versions:
	3.1.101
	3.0.100
	3.0.100-preview5-011568
	3.0.100-preview-009812
	2.2.203
	2.2.103
	2.1.302
	2.1.300-preview2-008530
	2.0.3
MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/6.6.0/lib/mono/msbuild/Current/bin/Sdks

=== .NET Core Runtime ===

Runtime: /usr/local/share/dotnet/dotnet
Runtime Versions:
	3.1.1
	3.0.0
	3.0.0-preview5-27626-15
	3.0.0-preview-27122-01
	2.2.4
	2.2.1
	2.1.15
	2.1.13
	2.1.2
	2.1.0-preview2-26406-04
	2.0.3

=== Xamarin.Profiler ===

Version: 1.6.12.26
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler

=== Updater ===

Version: 11

=== Apple Developer Tools ===

Xcode 11.3.1 (15715)
Build 11C504

=== Xamarin Designer ===

Version: 16.4.0.478
Hash: 95f0ab363
Branch: remotes/origin/d16-4
Build date: 2020-01-08 23:59:46 UTC

=== Xamarin.Mac ===

Version: 6.10.0.17 (Visual Studio Community)
Hash: 5f802ef53
Branch: xcode11.3
Build date: 2020-01-07 11:53:06-0500

=== Xamarin.iOS ===

Version: 13.10.0.17 (Visual Studio Community)
Hash: 5f802ef53
Branch: xcode11.3
Build date: 2020-01-07 11:53:06-0500

=== Xamarin.Android ===

Version: 10.1.3.7 (Visual Studio Community)
Commit: xamarin-android/d16-4/d66aed0
Android SDK: /Users/fak/Library/Developer/Xamarin/android-sdk-macosx
	Supported Android versions:
		4.4 (API level 19)
		7.0 (API level 24)
		7.1 (API level 25)
		8.1 (API level 27)

SDK Tools Version: 26.1.1
SDK Platform Tools Version: 26.0.2
SDK Build Tools Version: 26.0.3

Build Information: 
Mono: fd9f379
Java.Interop: xamarin/java.interop/d16-4@c4e569f
ProGuard: xamarin/proguard/master@905836d
SQLite: xamarin/sqlite/3.28.0@46204c4
Xamarin.Android Tools: xamarin/xamarin-android-tools/master@9f4ed4b

=== Microsoft Mobile OpenJDK ===

Java SDK: /Users/fak/Library/Developer/Xamarin/jdk/microsoft_dist_openjdk_8.0.25
1.8.0-25
Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL

=== Android SDK Manager ===

Version: 16.4.0.9
Hash: 3f7256f
Branch: remotes/origin/d16-4
Build date: 2020-01-14 22:19:04 UTC

=== Android Device Manager ===

Version: 16.4.0.30
Hash: f9172e2
Branch: remotes/origin/d16-4
Build date: 2020-01-14 22:19:24 UTC

=== Xamarin Inspector ===

Version: 1.4.3
Hash: db27525
Branch: 1.4-release
Build date: Mon, 09 Jul 2018 21:20:18 GMT
Client compatibility: 1

=== Build Information ===

Release ID: 804020059
Git revision: eb6fcdd83a227678e487aa733df3c8745f54fafc
Build date: 2020-01-17 12:12:02+00
Build branch: release-8.4
Xamarin extensions: ec32c90978c94f03d72f507b01f5aee70952ce87

=== Operating System ===

Mac OS X 10.15.2
Darwin 19.2.0 Darwin Kernel Version 19.2.0
    Sat Nov  9 03:47:04 PST 2019
    root:xnu-6153.61.1~20/RELEASE_X86_64 x86_64

=== Enabled user installed extensions ===

MSBuild Editor 2.3.1
```

### Build Logs

[Build Log.txt](https://github.com/xamarin/xamarin-macios/files/4100550/Build.Log.txt)



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mono_threads_state_poll_with_info crashes with error: Cannot transition thread from STATE_BLOCKING with STATE_POLL #7742

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mono_threads_state_poll_with_info crashes with error: Cannot transition thread from STATE_BLOCKING with STATE_POLL #7742

Description

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Expected Behavior

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Environment

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