Conflicting inheritance from superinterface is not a compile time error

tests/language/language.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.
 
 # This directory contains tests that are intended to show the
 # current state of the language.
 
 [ $compiler == none ]
 mixin_super_constructor_named_test: Fail # Issue 12631
 mixin_super_constructor_positionals_test: Fail # Issue 12631
@@ skipping 21 matching lines @@
 deferred_constraints_constants_old_syntax_test/constructor2: Fail, Ok
 
 [ $compiler == dart2dart]
 # Issue 17523
 deferred_load_library_wrong_args_test/none: Fail
 deferred_load_inval_code_test: Fail # dartbug.com/17933
 deferred_constraints_type_annotation_test/*: Fail, Pass
 deferred_constraints_constants_test/*: Fail, Pass
 deferred_shadow_load_library_test: Fail
 deferred_closurize_load_library_test: Fail
+override_inheritance_mixed_test/08: Fail # Issue 18124
+override_inheritance_mixed_test/09: Fail # Issue 18124
 
 [ $compiler == none || $compiler == dart2dart]
 # These test use the old syntax, and will be phased out.
 deferred_constraints_type_annotation_old_syntax_test/as_operation: Fail, Ok
 deferred_constraints_type_annotation_old_syntax_test/is_check: Fail, Ok
 deferred_constraints_type_annotation_old_syntax_test/catch_check: Fail, Ok
 deferred_constraints_type_annotation_old_syntax_test/new_before_load: Fail, Ok
 
 # Non-contractive types are not supported in the vm.
 cyclic_type_test/02: Fail, OK
@@ skipping 10 matching lines @@
 
 [ $compiler == none || $compiler == dartanalyzer || $compiler == dart2analyzer ]
 # Issue 17521, 17522
 deferred_no_prefix_old_syntax_test/01: Fail
 deferred_duplicate_prefix1_old_syntax_test/01: Fail
 deferred_duplicate_prefix2_old_syntax_test/01: Fail
 deferred_duplicate_prefix3_old_syntax_test/01: Fail
 
 [ $compiler == none && $runtime == vm ]
 class_keyword_test/02: MissingCompileTimeError # Issue 13627
-override_inheritance_mixed_test/08: MissingCompileTimeError # Issue 16137
-override_inheritance_mixed_test/09: MissingCompileTimeError # Issue 16137
 
 unicode_bom_test: Fail # Issue 16067
 
 [ $compiler == none && $checked ]
 type_variable_bounds4_test/01: Fail # Issue 14006
 
 [ $compiler == none && $unchecked ]
 # Only checked mode reports an error on type assignment
 # problems in compile time constants.
 type_check_const_function_typedef2_test/00: Fail, OK
@@ skipping 21 matching lines @@
 type_checks_in_factory_method_test: Fail # Issue 13719: Please triage this failure.
 vm/type_vm_test: Fail # Issue 13719: Please triage this failure.
 
 [ $compiler == none && $runtime == dartium ]
 first_class_types_literals_test: Pass, Fail # Issue 13719: Please triage this failure.
 issue13474_test: Pass, Fail # Issue 14651.
 
 [ $compiler == none && ( $runtime == dartium || $runtime == drt ) ]
 typed_message_test: Crash, Fail # Issue 13921, 14400
 vm/optimized_guarded_field_isolates_test: Fail # Issue 13921.
-override_inheritance_mixed_test/08: Fail # Issue 16137
-override_inheritance_mixed_test/09: Fail # Issue 16137
 
 [ $compiler == none && $runtime == vm && $arch == mips && $checked ]
 generic_instanceof3_test: Pass, Crash # Issue 17440.
 
 [ $compiler == none && $runtime == vm && $arch == mips && $mode == debug ]
 stack_overflow_test: Skip # Crashes. Issue 17440.
 stack_overflow_stacktrace_test: Skip # Crashes. Issue 17440.
 
 [ $compiler == none && $runtime == vm && $arch == simarm64 ]
 *: Skip