Added corner case test for int range iteration.

compiler/testData/codegen/boxWithStdlib/ranges/multiAssignmentIterationOverIntRange.kt

@@ -0,0 +1,21 @@
+fun Int.component1(): String {
+    return arrayListOf("zero", "one", "two", "three")[this]
+}
+
+fun Int.component2(): Int {
+    return arrayListOf(0, 1, 4, 9)[this]
+}
+
+fun box(): String {
+    val strings = arrayListOf<String>()
+    val squares = arrayListOf<Int>()
+
+    for ((str, sq) in 1..3) {
+        strings.add(str)
+        squares.add(sq)
+    }
+
+    if (strings != arrayListOf("one", "two", "three")) return "FAIL: $strings"
+    if (squares != arrayListOf(1, 4, 9)) return "FAIL: $squares"
+    return "OK"
+}

compiler/tests/org/jetbrains/jet/codegen/generated/BlackBoxWithStdlibCodegenTestGenerated.java

@@ -390,6 +390,11 @@ public class BlackBoxWithStdlibCodegenTestGenerated extends AbstractBlackBoxCode
             JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), "org.jetbrains.jet.generators.tests.GenerateTests", new File("compiler/testData/codegen/boxWithStdlib/ranges"), Pattern.compile("^(.+)\\.kt$"), true);
         }
         
+        @TestMetadata("multiAssignmentIterationOverIntRange.kt")
+        public void testMultiAssignmentIterationOverIntRange() throws Exception {
+            doTestWithStdlib("compiler/testData/codegen/boxWithStdlib/ranges/multiAssignmentIterationOverIntRange.kt");
+        }
+        
         @TestMetadata("compiler/testData/codegen/boxWithStdlib/ranges/expression")
         public static class Expression extends AbstractBlackBoxCodegenTest {
             public void testAllFilesPresentInExpression() throws Exception {

generators/org/jetbrains/jet/generators/tests/GenerateRangesCodegenTestData.java

@@ -111,7 +111,8 @@ public class GenerateRangesCodegenTestData {
 
     public static void main(String[] args) {
         try {
-            FileUtil.delete(TEST_DATA_DIR);
+            FileUtil.delete(AS_LITERAL_DIR);
+            FileUtil.delete(AS_EXPRESSION_DIR);
             //noinspection ResultOfMethodCallIgnored
             AS_LITERAL_DIR.mkdirs();
             //noinspection ResultOfMethodCallIgnored