DfaMemoryState is unfortunately mutable; use defensive copying

java/java-tests/testData/inspection/dataFlow/fixture/AnonymousMethodIndependence.java

@@ -0,0 +1,16 @@
+class A {
+  void foo(final Object arg) {
+    new Object() {
+      void foo() {
+        if (arg instanceof Number) {
+          return;
+        }
+      }
+      void foo1() {
+        if (arg instanceof Number) {
+          return;
+        }
+      }
+    };
+  }
+}

java/java-tests/testSrc/com/intellij/codeInspection/DataFlowInspectionTest.java

@@ -292,6 +292,7 @@ public class DataFlowInspectionTest extends LightCodeInsightFixtureTestCase {
   public void testNoGenericCCE() { doTest(); }
   public void testLongCircuitOperations() { doTest(); }
   public void testUnconditionalForLoop() { doTest(); }
+  public void testAnonymousMethodIndependence() { doTest(); }
   
   public void _testNullCheckBeforeInstanceof() { doTest(); }
 }