KT-1199 - test and fix for erased case

compiler/backend/src/org/jetbrains/jet/codegen/ExpressionCodegen.java

@@ -343,7 +343,7 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> {
         Type asmParamType = asmType(paramType);
 
         int iteratorVar = myFrameMap.enterTemp();
-        gen(expression.getLoopRange(), loopRangeType);
+        gen(expression.getLoopRange(), boxType(loopRangeType));
         invokeFunctionNoParams(iteratorDescriptor, asmIterType, v);
         v.store(iteratorVar, asmIterType);
         

compiler/testData/codegen/regressions/kt1199.kt

@@ -0,0 +1,20 @@
+fun <erased T : Any> T?.iterator() = object {
+    var hasNext = this@iterator != null
+      private set
+
+    fun next() : T {
+        if (hasNext) {
+            hasNext = false
+            return this@iterator.sure()
+        }
+        throw java.util.NoSuchElementException()
+    }
+}
+
+fun box() : String {
+  var k = 0
+  for (i in 1) {
+    k++
+  }
+  return if(k == 1) "OK" else "fail"
+}

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

@@ -70,6 +70,10 @@ public class FunctionGenTest extends CodegenTestCase {
         blackBoxFile("regressions/kt873.kt");
     }
 
+    public void testKt1199 () {
+        blackBoxFile("regressions/kt1199.kt");
+    }
+
     public void testFunction () throws InvocationTargetException, IllegalAccessException {
         blackBoxFile("functions/functionExpression.jet");
     }