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dotnet · Jul 31, 2020 · 60f9b3c · 60f9b3c
1 parent cfc02b0
commit 60f9b3c
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/src/Compilers/CSharp/Portable/FlowAnalysis/NullableWalker.cs b/src/Compilers/CSharp/Portable/FlowAnalysis/NullableWalker.cs
@@ -468,7 +468,8 @@ void enforceMemberNotNull(SyntaxNode? syntaxOpt, LocalState state)
                     return;
                 }
 
-                if (_symbol is MethodSymbol method)
+                var method = _symbol as MethodSymbol;
+                if (method is object)
                 {
                     do
                     {
@@ -555,7 +556,8 @@ bool memberHasBadState(Symbol member, LocalState state)
 
             void makeNotNullMembersMaybeNull()
             {
-                if (_symbol is MethodSymbol method)
+                var method = _symbol as MethodSymbol;
+                if (method is object)
                 {
                     do
                     {
@@ -6853,7 +6855,7 @@ private MethodSymbol CheckMethodGroupReceiverNullability(BoundMethodGroup group,
                         arguments.Add(new BoundExpressionWithNullability(syntax, new BoundParameter(syntax, parameter), parameterType.NullableAnnotation, parameterType.Type));
                     }
                     Debug.Assert(_binder is object);
-                    method = InferMethodTypeArguments(_binder!, method, arguments.ToImmutableAndFree(), argumentRefKindsOpt: default, argsToParamsOpt: default, expanded: false);
+                    method = InferMethodTypeArguments(_binder, method, arguments.ToImmutableAndFree(), argumentRefKindsOpt: default, argsToParamsOpt: default, expanded: false);
                 }
                 if (invokedAsExtensionMethod)
                 {