extract method: do not suggest to replace duplicates if candidates intersects with extracted method

java/java-impl/src/com/intellij/refactoring/util/duplicates/DuplicatesFinder.java

@@ -164,7 +164,9 @@ public class DuplicatesFinder {
 
   @Nullable
   private Match isDuplicateFragment(PsiElement candidate, boolean ignoreParameterTypes) {
-    if (PsiTreeUtil.isAncestor(myPattern[0], candidate, false)) return null;
+    for (PsiElement pattern : myPattern) {
+      if (PsiTreeUtil.isAncestor(pattern, candidate, false)) return null;
+    }
     PsiElement sibling = candidate;
     ArrayList<PsiElement> candidates = new ArrayList<PsiElement>();
     for (final PsiElement element : myPattern) {

java/java-tests/testData/refactoring/extractMethod/TwoFromThreeEqStatements.java

@@ -0,0 +1,8 @@
+class Test {
+
+    public static void main(String[] args) {
+        <selection>System.out.println("hello");
+                System.out.println("hello");</selection>
+                System.out.println("hello");
+    }
+}

java/java-tests/testData/refactoring/extractMethod/TwoFromThreeEqStatements_after.java

@@ -0,0 +1,12 @@
+class Test {
+
+    public static void main(String[] args) {
+        newMethod();
+                System.out.println("hello");
+    }
+
+    private static void newMethod() {
+        System.out.println("hello");
+        System.out.println("hello");
+    }
+}

java/java-tests/testSrc/com/intellij/refactoring/ExtractMethodTest.java

@@ -561,7 +561,11 @@ public class ExtractMethodTest extends LightCodeInsightTestCase {
   public void testFinalParams4LocalClasses() throws Exception {
     doTest();
   }
-  
+
+  public void testTwoFromThreeEqStatements() throws Exception {
+    doDuplicatesTest();
+  }
+
   private void doTestDisabledParam() throws PrepareFailedException {
     final CodeStyleSettings settings = CodeStyleSettingsManager.getSettings(getProject());
     settings.ELSE_ON_NEW_LINE = true;