Fix for KT-7288: VerifyError on accessing array element in 'is' block

#KT-7288 Fixed

compiler/testData/codegen/box/arrays/arrayInstanceOf.kt

@@ -0,0 +1,26 @@
+//test [], get and iterator calls
+fun test(createIntNotLong: Boolean): String {
+    val a = if (createIntNotLong) IntArray(5) else LongArray(5)
+    if (a is IntArray) {
+        val x = a.iterator()
+        var i = 0
+        while (x.hasNext()) {
+            if (a[i] != x.next()) return "Fail $i"
+            i++
+        }
+        return "O"
+    } else if (a is LongArray) {
+        val x = a.iterator()
+        var i = 0
+        while (x.hasNext()) {
+            if (a.get(i) != x.next()) return "Fail $i"
+            i++
+        }
+        return "K"
+    }
+    return "fail"
+}
+
+fun box(): String {
+    return test(true) + test(false)
+}