Merge pull request #2178 from vweijsters/fix-2174

Improved SA1101 workaround to accept missing symbol information

Author: sharwell

StyleCop.Analyzers/StyleCop.Analyzers/ReadabilityRules/SA1101PrefixLocalCallsWithThis.cs

@@ -193,17 +193,20 @@ private static void HandleIdentifierNameImpl(SyntaxNodeAnalysisContext context,
                 {
                     var memberAccessSymbol = context.SemanticModel.GetSymbolInfo(nameExpression.Parent, context.CancellationToken).Symbol;
 
-                    switch (memberAccessSymbol.Kind)
+                    switch (memberAccessSymbol?.Kind)
                     {
-                        case SymbolKind.Field:
-                        case SymbolKind.Method:
-                        case SymbolKind.Property:
-                            if (memberAccessSymbol.IsStatic && (memberAccessSymbol.ContainingType.Name == symbol.Name))
-                            {
-                                return;
-                            }
-
-                            break;
+                    case null:
+                        break;
+
+                    case SymbolKind.Field:
+                    case SymbolKind.Method:
+                    case SymbolKind.Property:
+                        if (memberAccessSymbol.IsStatic && (memberAccessSymbol.ContainingType.Name == symbol.Name))
+                        {
+                            return;
+                        }
+
+                        break;
                     }
                 }