Expect test to fail in unchecked mode as well.

tests/co19/co19-dart2js.status

Index: tests/co19/co19-dart2js.status
diff --git a/tests/co19/co19-dart2js.status b/tests/co19/co19-dart2js.status
index 08fe1a137edad84e0218254bcb2dfeb61ee8b87f..52108059c836314920c22de6b607e61689d1c986 100644
--- a/tests/co19/co19-dart2js.status
+++ b/tests/co19/co19-dart2js.status
@@ -656,6 +656,8 @@ LibTest/core/double/round_A01_t04: Fail # truncate/ceil/floor/round returns ints
 LibTest/core/double/truncate_A01_t03: Fail # truncate/ceil/floor/round returns ints, issue 389
 LibTest/core/double/truncate_A01_t04: Fail # truncate/ceil/floor/round returns ints, issue 389
 
+LibTest/core/List/getRange_A02_t01: Fail # issue 391
+
 # Issues with co19 test suite in checked mode.
 [ $compiler == dart2js && $checked ]
 LibTest/isolate/SendPort/call_A01_t01: Fail # Future is in async library. co19 issue 367
@@ -664,8 +666,6 @@ LibTest/core/Set/intersection_A01_t01: Fail # issue 390
 LibTest/core/Set/intersection_A01_t02: Fail # issue 390
 LibTest/core/Set/intersection_A01_t03: Fail # issue 390
 
-LibTest/core/List/getRange_A02_t01: Fail # issue 391
-
 # Issues with co19 test suite in unchecked mode.
 [ $compiler == dart2js && $unchecked ]
 LibTest/core/Set/intersection_A03_t01: Fail # Doesn't expect null to be allowed in Set or Map keys (issue 377). Passes in checked mode due to Issue 390.