Report errors on repeated interfaces.

tests/co19/co19-dart2js.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # Crashes first, please. Then untriaged bugs. There is a section below
 # for co19 bugs.
 [ $compiler == dart2js ]
 Language/03_Overview/1_Scoping_A02_t05: Fail # TODO(ahe): Please triage this failure.
 Language/03_Overview/1_Scoping_A02_t06: Fail # TODO(ahe): Please triage this failure.
 Language/05_Variables/05_Variables_A05_t02: Fail # TODO(ahe): Please triage this failure.
@@ skipping 652 matching lines @@
 Language/07_Classes/07_Classes_A02_t04: Fail # Checks that it is a compile-time error if a constant constructor declaration with initializers includes a body.
 Language/07_Classes/07_Classes_A02_t11: Fail # Checks that it is a compile-time error if a static final variable declaration does not include explicit initializer.
 Language/07_Classes/07_Classes_A03_t02: Fail # Checks that it is a compile-time error if a factory constructor method definition does not include a body.
 Language/07_Classes/07_Classes_A03_t08: Fail # Checks that it is a compile-time error if a static setter method definition does not include a body.
 Language/07_Classes/07_Classes_A03_t09: Fail # Checks that it is a compile-time error if a static function method definition does not include a body.
 Language/07_Classes/07_Classes_A04_t19: Fail # Checks that an abstract static method can't be used in place of a class member definition./
 Language/07_Classes/07_Classes_A04_t21: Fail # Checks that a static operator can't be used in place of a class member definition.
 Language/07_Classes/07_Classes_A04_t22: Fail # Checks that an abstract static operator can't be used in place of a class member definition./
 Language/07_Classes/07_Classes_A04_t24: Fail # Checks that a static abstract getter can't be used in place of a class member definition.
 Language/07_Classes/07_Classes_A04_t25: Fail # Checks that a static abstract setter can't be used in place of a class member definition.
-Language/07_Classes/10_Superinterfaces_A04_t01: Fail # Checks that it is a compile-time error if the same type appears more than once in the implements clause.
 Language/07_Classes/1_Instance_Methods/2_Operators_A06_t02: Fail # Checks that a compile-time error is produced if a user-defined operator ~ specifies one parameter.
 Language/07_Classes/1_Instance_Methods/2_Operators_A07_t01: Fail # Checks that a compile-time error is produced if a user-defined operator [] specifies an optional named parameter.
 Language/07_Classes/1_Instance_Methods/2_Operators_A07_t02: Fail # Checks that a compile-time error is produced if a user-defined operator [] specifies an optional named parameter in addition to the required one.
 Language/07_Classes/1_Instance_Methods/2_Operators_A07_t03: Fail # Checks that a compile-time error is produced if a user-defined operator []= specifies one optional named parameter.
 Language/07_Classes/1_Instance_Methods/2_Operators_A07_t04: Fail # Checks that a compile-time error is produced if a user-defined operator []= specifies one optional named parameter in addition to the two required ones
 Language/07_Classes/1_Instance_Methods_A02_t02: Fail # Checks that a compile-time error is produced if m1 has fewer named parameters than m2 (1 vs. 0) and neither have any required parameters.
 Language/07_Classes/1_Instance_Methods_A02_t05: Fail # Checks that a compile-time error is produced if m1 has almost the same set of named  parameters as m2 except for one of them having a different name.
 Language/07_Classes/2_Getters_A01_t03: Fail # Checks that a compile-time error is produced if empty formal parameter list is present.
 Language/07_Classes/2_Getters_A01_t04: Fail # Checks that a compile-time error is produced if non-empty formal parameter list is present.
 Language/07_Classes/2_Getters_A01_t05: Fail # Checks that a compile-time error is produced if an static getter has empty formal parameter list.
@@ skipping 82 matching lines @@
 Language/14_Types/5_Function_Types_A01_t09: Fail # dartbug.com/7342
 Language/14_Types/5_Function_Types_A01_t11: Fail # dartbug.com/7342
 Language/14_Types/5_Function_Types_A02_t05: Fail # dartbug.com/7342
 Language/14_Types/5_Function_Types_A02_t07: Fail # dartbug.com/7342
 Language/14_Types/5_Function_Types_A02_t09: Fail # dartbug.com/7342
 Language/14_Types/5_Function_Types_A02_t10: Fail # dartbug.com/7342
 Language/14_Types/5_Function_Types_A03_t06: Fail # dartbug.com/7342
 Language/14_Types/5_Function_Types_A03_t08: Fail # dartbug.com/7342
 Language/14_Types/5_Function_Types_A03_t10: Fail # dartbug.com/7342
 Language/14_Types/5_Function_Types_A03_t11: Fail # dartbug.com/7342