re-enabled assert we have disabled

src/Compilers/VisualBasic/Portable/Binding/Binder_Expressions.vb

@@ -251,11 +251,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
                     ' e.g. SyntaxKind.MidExpression is handled elsewhere
                     ' NOTE: There were too many "else" cases to justify listing them explicitly and throwing on
                     ' anything unexpected.
-                    '
-                    ' PROTOTYPE(IOperation)
-                    ' re-enable the assert once this issue is fixed
-                    ' https://github.com/dotnet/roslyn/issues/21180
-                    ' Debug.Assert(node.ContainsDiagnostics, String.Format("Unexpected {0} syntax does not have diagnostics", node.Kind))
+                    Debug.Assert(IsSemanticModelBinder OrElse node.ContainsDiagnostics, String.Format("Unexpected {0} syntax does not have diagnostics", node.Kind))
                     Return BadExpression(node, ImmutableArray(Of BoundExpression).Empty, ErrorTypeSymbol.UnknownResultType)
 
             End Select

src/Compilers/VisualBasic/Portable/Binding/Binder_Statements.vb

@@ -65,11 +65,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
 
                 Case SyntaxKind.ElseIfStatement
                     ' ElseIf without a preceding If.
-                    '
-                    ' PROTOTYPE(IOperation)
-                    ' re-enable the assert once this issue is fixed
-                    ' https://github.com/dotnet/roslyn/issues/21180
-                    ' Debug.Assert(node.ContainsDiagnostics)
+                    Debug.Assert(IsSemanticModelBinder OrElse node.ContainsDiagnostics)
                     Dim condition = BindBooleanExpression(DirectCast(node, ElseIfStatementSyntax).Condition, diagnostics)
                     Return New BoundBadStatement(node, ImmutableArray.Create(Of BoundNode)(condition), hasErrors:=True)
 
@@ -200,31 +196,27 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
                     '     where only the ones that can appear in a method body have been selected).
                     '
                     '   We simply need to ignore this, the error is already created by the parser.
-                    ' 
-                    ' PROTOTYPE(IOperation)
-                    ' re-enable the assert once this issue is fixed
-                    ' https://github.com/dotnet/roslyn/issues/21180
-                    'Debug.Assert(node.ContainsDiagnostics OrElse
-                    '             (node.IsMissing AndAlso
-                    '              (node.Parent.Kind = SyntaxKind.MultiLineSubLambdaExpression OrElse
-                    '               node.Parent.Kind = SyntaxKind.MultiLineFunctionLambdaExpression OrElse
-                    '               node.Parent.Kind = SyntaxKind.AddHandlerAccessorBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.RemoveHandlerAccessorBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.RaiseEventAccessorBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.MultiLineIfBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.ElseIfBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.ElseBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.SimpleDoLoopBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.DoWhileLoopBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.DoUntilLoopBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.WhileBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.WithBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.ForBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.ForEachBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.SyncLockBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.SelectBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.TryBlock OrElse
-                    '               node.Parent.Kind = SyntaxKind.UsingBlock)))
+                    Debug.Assert(IsSemanticModelBinder OrElse node.ContainsDiagnostics OrElse
+                                 (node.IsMissing AndAlso
+                                  (node.Parent.Kind = SyntaxKind.MultiLineSubLambdaExpression OrElse
+                                   node.Parent.Kind = SyntaxKind.MultiLineFunctionLambdaExpression OrElse
+                                   node.Parent.Kind = SyntaxKind.AddHandlerAccessorBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.RemoveHandlerAccessorBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.RaiseEventAccessorBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.MultiLineIfBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.ElseIfBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.ElseBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.SimpleDoLoopBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.DoWhileLoopBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.DoUntilLoopBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.WhileBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.WithBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.ForBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.ForEachBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.SyncLockBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.SelectBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.TryBlock OrElse
+                                   node.Parent.Kind = SyntaxKind.UsingBlock)))
 
                     Return New BoundBadStatement(node, ImmutableArray(Of BoundNode).Empty, hasErrors:=True)
 
@@ -272,11 +264,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
             ' not handling here and then throwing ExceptionUtilities.UnexpectedValue in the else case, but
             ' there are just too many statement SyntaxKinds in VB (e.g. declarations, statements corresponding
             ' to blocks handled above, etc).
-            '
-            ' PROTOTYPE(IOperation)
-            ' re-enable the assert once this issue is fixed
-            ' https://github.com/dotnet/roslyn/issues/21180
-            ' Debug.Assert(node.ContainsDiagnostics)
+            Debug.Assert(IsSemanticModelBinder OrElse node.ContainsDiagnostics)
             Return New BoundBadStatement(node, ImmutableArray(Of BoundNode).Empty, hasErrors:=True)
         End Function