Fix bug in Looped Random Instantiation when object is the type.

Author: Hosch250

VSDiagnostics/VSDiagnostics/VSDiagnostics.Test/Tests/General/LoopedRandomInstantiationTests.cs

@@ -194,5 +194,23 @@ void Method()
 
             VerifyDiagnostic(original);
         }
+
+        [TestMethod]
+        public void LoopedRandomInstantiation_TypeIsObject_DoesNotCrashAnalyzerBecauseContainingNamespaceIsNull()
+        {
+            var original = @"
+namespace ConsoleApplication1
+{
+    class MyClass
+    {
+        void Method()
+        {
+            object[] o = {};
+        }
+    }
+}";
+
+            VerifyDiagnostic(original);
+        }
     }
 }

VSDiagnostics/VSDiagnostics/VSDiagnostics/Diagnostics/General/LoopedRandomInstantiation/LoopedRandomInstantiationAnalyzer.cs

@@ -36,9 +36,9 @@ private void AnalyzeSymbol(SyntaxNodeAnalysisContext context)
             if (type == null) { return; }
 
             var typeInfo = context.SemanticModel.GetTypeInfo(type).Type;
-            if (typeInfo == null) { return; }
 
-            if (typeInfo.OriginalDefinition.ContainingNamespace.Name != nameof(System) ||
+            if (typeInfo?.OriginalDefinition.ContainingNamespace == null ||
+                typeInfo.OriginalDefinition.ContainingNamespace.Name != nameof(System) ||
                 typeInfo.Name != nameof(System.Random))
             {
                 return;