#1913: Do not destroy control-flow by removing return statements

ICSharpCode.Decompiler/IL/Transforms/TransformDisplayClassUsage.cs

@@ -64,6 +64,7 @@ namespace ICSharpCode.Decompiler.IL.Transforms
 						if ((context.Settings.AnonymousMethods || context.Settings.ExpressionTrees) && IsClosure(context, v, out ITypeDefinition closureType, out var inst)) {
 							if (!CanRemoveAllReferencesTo(context, v))
 								continue;
+							if (inst is StObj || inst is StLoc)
 								instructionsToRemove.Add(inst);
 							AddOrUpdateDisplayClass(f, v, closureType, inst, localFunctionClosureParameter: false);
 							continue;