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"
+}