KT-1779: test for obsolete issue

compiler/testData/codegen/regressions/kt1779.kt

@@ -0,0 +1,18 @@
+import kotlin.support.AbstractIterator
+
+class MyIterator : AbstractIterator<String>() {
+    var i = 0
+    public override fun computeNext() {
+        if(i < 5)
+          setNext((i++).toString())
+    }
+
+}
+
+fun box() : String {
+    var k = ""
+    for (x in MyIterator()) {
+        k+=x
+    }
+    return if(k=="01234") "OK" else k
+}

compiler/tests/org/jetbrains/jet/codegen/StdlibTest.java

@@ -348,4 +348,8 @@ public class StdlibTest extends CodegenTestCase {
     public void test1733() {
         blackBoxFile("regressions/kt1733.kt");
     }
+
+    public void test1779() {
+        blackBoxFile("regressions/kt1779.kt");
+    }
 }