Improve diagnosability of Expression.Lambda(Expression.Constant(123)).Compile().GetMethodInfo()

Entity framework would like to inspect the MethodInfo obtained from a delegate that points to the LINQ expression interpreter. This will currently throw a very unhelpful exception that makes it look like we're missing metadata - when in fact, we're missing a feature.

EF will ship with a workaround in their 2.0.1 release, but if anyone tries with 2.0.0 (or hits this in any other way), let's give them something more diagnosable.

[tfs-changeset: 1670903]

1 files changed, 1 insertions, 4 deletions

diff --git a/src/System.Private.TypeLoader/src/Internal/Runtime/TypeLoader/CallConverterThunk.cs b/src/System.Private.TypeLoader/src/Internal/Runtime/TypeLoader/CallConverterThunk.cs
index 1038c02b7..ba58a629b 100644
--- a/src/System.Private.TypeLoader/src/Internal/Runtime/TypeLoader/CallConverterThunk.cs
+++ b/src/System.Private.TypeLoader/src/Internal/Runtime/TypeLoader/CallConverterThunk.cs
@@ -263,11 +263,8 @@ namespace Internal.Runtime.TypeLoader
             if (thunkKind == ReversePinvokeThunk)
             {
                 // Special unsupported thunk kind. Similar behavior to the thunks generated by the delegate ILTransform for this thunk kind
-
-                RuntimeTypeHandle thDummy;
-                bool isOpenResolverDummy;
                 Action throwNotSupportedException = () => { throw new NotSupportedException(); };
-                return RuntimeAugments.GetDelegateLdFtnResult(throwNotSupportedException, out thDummy, out isOpenResolverDummy);
+                return RuntimeAugments.GetDelegateLdFtnResult(throwNotSupportedException, out RuntimeTypeHandle _, out bool _, out bool _);
             }
 
             RuntimeTypeHandle delegateType = RuntimeAugments.GetRuntimeTypeHandleFromObjectReference(delegateObject);