diff --git a/src/domain_tests/TestRunner.cs b/src/domain_tests/TestRunner.cs
@@ -843,6 +843,210 @@ raise AssertionError('failed to raise')
    assert foo is not bar
                    ",
            },
            new TestCase
            {
                Name = "nested_type",

diff --git a/src/runtime/StateSerialization/MaybeMethodBase.cs b/src/runtime/StateSerialization/MaybeMethodBase.cs
@@ -35,11 +35,11 @@ public ParameterHelper(ParameterInfo tp)
                Name = tp.ParameterType.AssemblyQualifiedName;
                Modifier = TypeModifier.None;

-                if (tp.IsIn)
                {
                    Modifier = TypeModifier.In;
                }
-                else if (tp.IsOut)
                {
                    Modifier = TypeModifier.Out;
                }
-Original file line number
+Diff line change
@@ Expand Up / @@ -843,6 +843,210 @@ raise AssertionError('failed to raise') @@
         assert foo is not bar
                         ",
                 },
                 new TestCase
                 {
                     Name = "nested_type",
@@ Expand Down @@