do not need to check stand-alone class object for class,

when it's on the left hand side of dot it is analyzed in 'getIdForImplicitReceiver' (test added)

compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/autocasts/DataFlowValueFactory.java

@@ -202,10 +202,6 @@ public class DataFlowValueFactory {
         if (declarationDescriptor instanceof NamespaceDescriptor) {
             return createNamespaceInfo(declarationDescriptor);
         }
-        if (declarationDescriptor instanceof ClassDescriptor) {
-            ClassDescriptor classDescriptor = (ClassDescriptor) declarationDescriptor;
-            return createInfo(classDescriptor, classDescriptor.getClassObjectDescriptor() != null);
-        }
         return NO_IDENTIFIER_INFO;
     }
 

compiler/testData/diagnostics/tests/smartCasts/classObjectMember.kt

@@ -0,0 +1,22 @@
+open class T {
+    val x : Int? = null
+}
+
+class A {
+    class object: T() {
+    }
+}
+
+class B {
+    class object: T() {
+    }
+}
+
+fun test() {
+    if (A.x != null) {
+        useInt(A.x)
+        useInt(<!TYPE_MISMATCH!>B.x<!>)
+    }
+}
+
+fun useInt(i: Int) = i

compiler/tests/org/jetbrains/jet/checkers/JetDiagnosticsTestGenerated.java

@@ -4867,6 +4867,11 @@ public class JetDiagnosticsTestGenerated extends AbstractDiagnosticsTestWithEage
                 JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), "org.jetbrains.jet.generators.tests.GenerateTests", new File("compiler/testData/diagnostics/tests/smartCasts"), Pattern.compile("^(.+)\\.kt$"), true);
             }
             
+            @TestMetadata("classObjectMember.kt")
+            public void testClassObjectMember() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/smartCasts/classObjectMember.kt");
+            }
+            
             @TestMetadata("combineWithNoSelectorInfo.kt")
             public void testCombineWithNoSelectorInfo() throws Exception {
                 doTest("compiler/testData/diagnostics/tests/smartCasts/combineWithNoSelectorInfo.kt");