--- /dev/null
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import core::kernel
+
+class G[E: Object]
+end
+
+class A
+ redef type N1: A
+ redef type N2: FAIL
+ fun foo1: G[N1] do return new G[N1]
+ fun foo2: G[N2] do return new G[N2]
+end
+
+var a = new A
+a.foo1
+a.foo2
--- /dev/null
+error_redef_vt.nit:21,2--17: Error: no property `A::N1` is inherited. Remove the `redef` keyword to define a new property.
+error_redef_vt.nit:22,17--20: Error: class `FAIL` not found in module `error_redef_vt`.
+error_redef_vt.nit:22,2--20: Error: no property `A::N2` is inherited. Remove the `redef` keyword to define a new property.