Exceptions on Assembly.LoadTypes for assembly "Accessibility" (2018.3.9)

I'm suddenly getting some exceptions from reflection calls that used to work fine, and before I report a bug, I'm wondering if someone has any idea about how to track down what's going on.

A few of our editor tools and our savegame serializer does this:

Code (csharp):

1. var allTypes = AppDomain.CurrentDomain.GetAssemblies().SelectMany(assembly => assembly.GetTypes());
2. // do something with all types

This worked without a hitch up to 2018.3.8, but has started throwing exceptions now. Adding some try-catch:

Code (csharp):

1.  //foreach assembly in AppDomain.CurrentDomain.GetAssemblies()
2. try {
3.     types = assembly.GetTypes();
4. }
5. catch (ReflectionTypeLoadException rtle) {
6.     if (!hasErroredThisReload) {
7.         Debug.LogError($"Can't load types from assembly {assembly.GetName().Name}. Exceptions follow");
8.         Debug.LogException(rtle);
9.         foreach (var exception in rtle.LoaderExceptions) {
10.             Debug.LogException(exception);
11.         }
12.         hasErroredThisReload = true;
13.     }
14.  
15.     continue;
16. }

Output:

Code (csharp):

1.  
2. Can't load types from assembly Accessibility. Exceptions follow
3. UnityEngine.Debug:LogError(Object)
4. <GetTypesFrom>d__2:MoveNext() (at Assets/Scripts/ExtensionMethods/AssemblyHelper.cs:22)
5. ...
6.  
7. ReflectionTypeLoadException: Exception of type 'System.Reflection.ReflectionTypeLoadException' was thrown.
8. System.Reflection.Assembly.GetTypes () (at <d7ac571ca2d04b2f981d0d886fa067cf>:0)
9. AssemblyHelper+<GetTypesFrom>d__2.MoveNext ()
10. ...
11.  
12. TypeLoadException: Could not set up field 'u' due to: Missing field layout info for hInproc assembly:C:\Program Files\Unity\Hub\Editor\2018.3.9f1\Editor\Data\MonoBleedingEdge\lib\mono\unityjit\Accessibility.dll type:__MIDL_IWinTypes_0009 member:(null) signature:<none>
13. UnityEngine.Debug:LogException(Exception)
14. <GetTypesFrom>d__2:MoveNext() (at Assets/Scripts/ExtensionMethods/AssemblyHelper.cs:25)
15. ...
16.  
17. TypeLoadException: Missing field layout info for hInproc
18. UnityEngine.Debug:LogException(Exception)
19. <GetTypesFrom>d__2:MoveNext() (at Assets/Scripts/ExtensionMethods/AssemblyHelper.cs:25)
20. ...
21.  

So it seems like there's errors when loading something from the .NET built-in Accessibility framework. Googling "hInproc" gets me here.

This doesn't happen in a blank project, but I can't figure out how to make a repro case, as I have no idea why Accessibility is even referenced. If I do a text search through the project, I only get references to UnityEngine.AccessibilityModule in .csproj files, and as far as I can tell, that doesn't reference Accessibility.

Anyone have any idea what's going on here? I'd love to create a repro, but I don't even know where to start stripping out things.

 

Thanks for the quick reply! I obviously didn't try to google hard enough, sorry about that.

 

I updated to 2018.3.11 and I still get the same error:

Code (CSharp):

1. TypeLoadException: Could not set up field 'u' due to: Missing field layout info for hInproc assembly:C:\Program Files\Unity\Hub\Editor\2018.3.11f1\Editor\Data\MonoBleedingEdge\lib\mono\unityjit\Accessibility.dll type:__MIDL_IWinTypes_0009 member:(null) signature:<none>