Reverted some gratuitous changes in lambda rewriting.

src/Compilers/CSharp/Portable/Lowering/LambdaRewriter/LambdaRewriter.cs

@@ -1126,7 +1126,7 @@ private DebugId GetClosureId(SyntaxNode syntax, ArrayBuilder<ClosureDebugInfo> c
 
             return closureId;
         }
-        
+
         private DebugId GetLambdaId(SyntaxNode syntax, ClosureKind closureKind, int closureOrdinal)
         {
             Debug.Assert(syntax != null);

src/Compilers/VisualBasic/Portable/Lowering/LambdaRewriter/LambdaRewriter.vb

@@ -258,10 +258,9 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
                 Dim syntax = scope.Syntax
                 Debug.Assert(syntax IsNot Nothing)
 
-                Dim localKind As SynthesizedLocalKind = If(TryCast(captured, SynthesizedLocal)?.SynthesizedKind, SynthesizedLocalKind.UserDefined)
                 ' Frames created for delegate relaxations are just immutable wrappers of the delegate target object.
                 ' They are not reused during EnC update and thus don't have a closure scope.
-                Dim isDelegateRelaxationFrame = localKind = SynthesizedLocalKind.DelegateRelaxationReceiver
+                Dim isDelegateRelaxationFrame = If(TryCast(captured, SynthesizedLocal)?.SynthesizedKind = SynthesizedLocalKind.DelegateRelaxationReceiver, False)
 
                 Dim methodId, closureId As DebugId