fixed some tests manually

src/Compilers/CSharp/Test/Semantic/IOperation/IOperationTests_IArgument.cs

@@ -1727,7 +1727,7 @@ static void M2(bool? x = null)
     }
 }
 ";
-            string expectedOperationTree = @"IInvocationExpression (static void P.M2([System.Boolean[missing]? x = null])) (OperationKind.InvocationExpression, Type: System.Void[missing]) (Syntax: 'M2()')";
+            string expectedOperationTree = @"IInvocationExpression (static void P.M2([System.Boolean[missing]? x = null])) (OperationKind.InvocationExpression, Type: System.Void[missing], IsInvalid) (Syntax: 'M2()')";
 
             var expectedDiagnostics = new DiagnosticDescription[] { 
                 // (3,7): error CS0518: Predefined type 'System.Object' is not defined or imported

src/Compilers/CSharp/Test/Semantic/IOperation/IOperationTests_IConversionExpression.cs

@@ -1005,7 +1005,7 @@ static void Main(string[] args)
   IVariableDeclaration (1 variables) (OperationKind.VariableDeclaration, IsInvalid) (Syntax: 'I1 /*<bind> ... *</bind>*/;')
     Variables: Local_1: I1 i1
     Initializer: IConversionExpression (ConversionKind.Cast, Implicit) (OperationKind.ConversionExpression, Type: I1, IsInvalid) (Syntax: 'i2')
-        ILocalReferenceExpression: i2 (OperationKind.LocalReferenceExpression, Type: I2) (Syntax: 'i2')
+        ILocalReferenceExpression: i2 (OperationKind.LocalReferenceExpression, Type: I2, IsInvalid) (Syntax: 'i2')
 ";
             var expectedDiagnostics = new DiagnosticDescription[] {
                 // CS0266: Cannot implicitly convert type 'I2' to 'I1'. An explicit conversion exists (are you missing a cast?)
@@ -4262,7 +4262,7 @@ struct S1 { }
   IVariableDeclaration (1 variables) (OperationKind.VariableDeclaration, IsInvalid) (Syntax: 'S1 /*<bind> ... *</bind>*/;')
     Variables: Local_1: S1 s1
     Initializer: IConversionExpression (ConversionKind.Invalid, Explicit) (OperationKind.ConversionExpression, Type: S1, IsInvalid) (Syntax: '(S1)i')
-        ILocalReferenceExpression: i (OperationKind.LocalReferenceExpression, Type: I1) (Syntax: 'i')
+        ILocalReferenceExpression: i (OperationKind.LocalReferenceExpression, Type: I1, IsInvalid) (Syntax: 'i')
 ";
             var expectedDiagnostics = new DiagnosticDescription[] {
                 // CS0030: Cannot convert type 'I1' to 'S1'

src/Compilers/CSharp/Test/Semantic/IOperation/IOperationTests_IUnaryOperatorExpression.cs

@@ -1116,10 +1116,10 @@ System.Char Method()
 
 ";
             string expectedOperationTree = @"
-IUnaryOperatorExpression (UnaryOperationKind.IntegerMinus) (OperationKind.UnaryOperatorExpression, Type: System.Int32) (Syntax: '-Method()')
-  IConversionExpression (ConversionKind.CSharp, Implicit) (OperationKind.ConversionExpression, Type: System.Int32) (Syntax: 'Method()')
-    IInvocationExpression ( System.Char A.Method()) (OperationKind.InvocationExpression, Type: System.Char) (Syntax: 'Method()')
-      Instance Receiver: IInstanceReferenceExpression (InstanceReferenceKind.Implicit) (OperationKind.InstanceReferenceExpression, Type: A) (Syntax: 'Method')
+IUnaryOperatorExpression (UnaryOperationKind.IntegerMinus) (OperationKind.UnaryOperatorExpression, Type: System.Int32, IsInvalid) (Syntax: '-Method()')
+  IConversionExpression (ConversionKind.CSharp, Implicit) (OperationKind.ConversionExpression, Type: System.Int32, IsInvalid) (Syntax: 'Method()')
+    IInvocationExpression ( System.Char A.Method()) (OperationKind.InvocationExpression, Type: System.Char, IsInvalid) (Syntax: 'Method()')
+      Instance Receiver: IInstanceReferenceExpression (InstanceReferenceKind.Implicit) (OperationKind.InstanceReferenceExpression, Type: A, IsInvalid) (Syntax: 'Method')
 ";
             VerifyOperationTreeForTest<PrefixUnaryExpressionSyntax>(source, expectedOperationTree);
         }

src/Compilers/CSharp/Test/Semantic/IOperation/IOperationTests_InvalidStatement.cs

@@ -271,7 +271,7 @@ static void Main(string[] args)
 ";
             string expectedOperationTree = @"
 IInvalidStatement (OperationKind.InvalidStatement, IsInvalid) (Syntax: 'goto case 1;')
-  Children(1): ILiteralExpression (Text: 1) (OperationKind.LiteralExpression, Type: System.Int32, Constant: 1) (Syntax: '1')
+  Children(1): ILiteralExpression (Text: 1) (OperationKind.LiteralExpression, Type: System.Int32, Constant: 1, IsInvalid) (Syntax: '1')
 ";
             var expectedDiagnostics = new DiagnosticDescription[] {
                 // CS0159: No such label 'case 1:' within the scope of the goto statement