Land Alexander's change that turns assert into a keyword.

tests/co19/co19-dart2dart.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.
 
 [ $compiler == dart2dart ]
 LibTest/isolate/isolate_api/port_A01_t01: Skip # Times out.
 
 Language/10_Expressions/11_Instance_Creation/1_New_A13_t02: Fail # TRIAGE
 
 Language/03_Overview/1_Scoping_A01_t39: Fail # http://dartbug.com/5519
@@ skipping 27 matching lines @@
 Language/05_Variables/05_Variables_A04_t04: Fail # http://dartbug.com/5519
 Language/05_Variables/05_Variables_A04_t05: Fail # http://dartbug.com/5519
 Language/05_Variables/05_Variables_A04_t06: Fail # http://dartbug.com/5519
 Language/05_Variables/05_Variables_A04_t07: Fail # http://dartbug.com/5519
 Language/05_Variables/05_Variables_A04_t08: Fail # http://dartbug.com/5519
 Language/05_Variables/05_Variables_A04_t10: Fail # http://dartbug.com/5519
 Language/05_Variables/05_Variables_A05_t01: Fail # http://dartbug.com/5519
 Language/05_Variables/05_Variables_A05_t02: Fail # http://dartbug.com/5519
 Language/06_Functions/06_Functions_A01_t06: Fail # inherited from VM
 Language/06_Functions/06_Functions_A01_t22: Fail # inherited from VM
-Language/06_Functions/06_Functions_A01_t23: Fail # http://dartbug.com/5519
 Language/06_Functions/06_Functions_A01_t31: Fail # http://dartbug.com/5519
 Language/06_Functions/1_Function_Declaration_A01_t01: Fail # http://dartbug.com/5519
 Language/06_Functions/1_Function_Declaration_A02_t02: Fail # http://dartbug.com/5519
 Language/06_Functions/1_Function_Declaration_A02_t03: Fail # inherited from VM
 Language/06_Functions/1_Function_Declaration_A03_t02: Fail # http://dartbug.com/5519
 Language/06_Functions/1_Function_Declaration_A03_t03: Fail # inherited from VM
 Language/06_Functions/2_Formal_Parameters/1_Required_Formals_A02_t03: Fail # http://dartbug.com/5519
 Language/06_Functions/2_Formal_Parameters/1_Required_Formals_A02_t04: Fail # http://dartbug.com/5519
 Language/06_Functions/2_Formal_Parameters/1_Required_Formals_A02_t05: Fail # http://dartbug.com/5519
 Language/06_Functions/2_Formal_Parameters/1_Required_Formals_A02_t06: Fail # http://dartbug.com/5519
@@ skipping 335 matching lines @@
 Language/10_Expressions/27_Assignable_Expressions_A01_t08: Fail # Inherited from dart2js
 Language/10_Expressions/27_Assignable_Expressions_A01_t09: Fail # Inherited from dart2js
 Language/10_Expressions/27_Assignable_Expressions_A01_t26: Fail # inherited from VM
 Language/10_Expressions/27_Assignable_Expressions_A01_t27: Fail # inherited from VM
 Language/10_Expressions/28_Identifier_Reference_A02_t01: Fail # Pseudo keyword "abstract".
 Language/10_Expressions/28_Identifier_Reference_A04_t01: Fail # Inherited from dart2js
 Language/10_Expressions/28_Identifier_Reference_A04_t03: Fail # Inherited from dart2js
 Language/10_Expressions/28_Identifier_Reference_A04_t06: Fail # Inherited from dart2js
 Language/10_Expressions/28_Identifier_Reference_A04_t07: Fail, OK # co19 issue 184
 Language/10_Expressions/28_Identifier_Reference_A05_t09: Fail # inherited from VM
-Language/10_Expressions/28_Identifier_Reference_A06_t07: Fail # inherited from VM
 Language/10_Expressions/28_Identifier_Reference_A06_t13: Fail, OK # co19 issue 254
 Language/10_Expressions/28_Identifier_Reference_A06_t15: Fail # inherited from VM
 Language/10_Expressions/28_Identifier_Reference_A07_t01: Fail # http://dartbug.com/5519
 Language/10_Expressions/28_Identifier_Reference_A07_t04: Fail # inherited from VM
 Language/10_Expressions/28_Identifier_Reference_A07_t09: Fail # inherited from dart2js
 Language/10_Expressions/28_Identifier_Reference_A07_t12: Fail # http://dartbug.com/5519
 Language/10_Expressions/28_Identifier_Reference_A08_t02: Fail # inherited from dart2js
 Language/10_Expressions/28_Identifier_Reference_A08_t04: Fail, Pass # co19 issue 218
 Language/10_Expressions/28_Identifier_Reference_A08_t05: Fail, Pass # co19 issue 218
 Language/10_Expressions/28_Identifier_Reference_A08_t32: Fail # inherited from dart2js
@@ skipping 44 matching lines @@
 Language/11_Statements/09_Try_A06_t03: Fail # inherited from VM
 Language/11_Statements/09_Try_A06_t04: Fail # inherited from VM
 Language/11_Statements/09_Try_A06_t05: Fail # inherited from VM
 Language/11_Statements/10_Return_A04_t01: Fail # http://dartbug.com/5519
 Language/11_Statements/10_Return_A04_t02: Fail # http://dartbug.com/5519
 Language/11_Statements/10_Return_A04_t03: Fail # http://dartbug.com/5519
 Language/11_Statements/11_Labels_A01_t03: Fail # inherited from VM
 Language/11_Statements/11_Labels_A03_t04: Fail # inherited from dart2js
 Language/11_Statements/13_Continue_A02_t12: Fail # inherited from dart2js
 Language/11_Statements/13_Continue_A02_t13: Fail # inherited from dart2js
-Language/11_Statements/15_Assert_A01_t03: Fail # http://dartbug.com/5519
-Language/11_Statements/15_Assert_A01_t04: Fail # http://dartbug.com/5519
-Language/11_Statements/15_Assert_A01_t05: Fail # http://dartbug.com/5519
 Language/13_Libraries_and_Scripts/13_Libraries_and_Scripts_A05_t04: Fail # inherited from VM
 Language/13_Libraries_and_Scripts/2_Imports_A01_t39: Fail # inherited from VM
 Language/13_Libraries_and_Scripts/2_Imports_A02_t01: Fail # inherited from VM
 Language/13_Libraries_and_Scripts/2_Imports_A02_t02: Fail # inherited from VM
 Language/13_Libraries_and_Scripts/2_Imports_A02_t16: Fail # inherited from VM
 Language/13_Libraries_and_Scripts/2_Imports_A02_t17: Fail # inherited from VM
 Language/13_Libraries_and_Scripts/2_Imports_A02_t18: Fail # inherited from VM
 Language/13_Libraries_and_Scripts/2_Imports_A02_t19: Fail # Inherited from VM
 Language/13_Libraries_and_Scripts/2_Imports_A02_t28: Fail # inherited from dart2js
 Language/13_Libraries_and_Scripts/2_Imports_A03_t02: Fail # inherited from VM
@@ skipping 12 matching lines @@
 Language/14_Types/3_Type_Declarations/1_Typedef_A06_t02: Fail # http://dartbug.com/5519
 Language/14_Types/3_Type_Declarations/1_Typedef_A06_t03: Fail # http://dartbug.com/5519
 Language/14_Types/3_Type_Declarations/1_Typedef_A06_t04: Fail # http://dartbug.com/5519
 Language/14_Types/3_Type_Declarations/1_Typedef_A07_t01: Fail, Pass # inherited from dart2js: fails in minify, self-reference typedef check not performed
 Language/14_Types/3_Type_Declarations/1_Typedef_A07_t02: Fail, Pass # inherited from dart2js: fails in minify, self-reference typedef check not performed
 Language/14_Types/3_Type_Declarations/1_Typedef_A07_t03: Fail, Pass # inherited from dart2js: fails in minify, self-reference typedef check not performed
 Language/14_Types/4_Interface_Types_A01_t01: Fail # Looks like dart2js issue, let's wait when interfaces are phased away
 Language/14_Types/4_Interface_Types_A02_t01: Fail # Looks like dart2js issue, let's wait when interfaces are phased away
 Language/14_Types/5_Function_Types_A01_t05: Fail # inherited from dart2js
 Language/14_Types/5_Function_Types_A02_t01: Fail # inherited from VM
-Language/15_Reference/1_Lexical_Rules/1_Reserved_Words_A30_t04: Fail # inherited from dart2js
-Language/15_Reference/1_Lexical_Rules/1_Reserved_Words_A30_t05: Fail # inherited from dart2js
 Language/15_Reference/1_Lexical_Rules/1_Reserved_Words_A40_t04: Fail # inherited from dart2js
 Language/15_Reference/1_Lexical_Rules_A01_t06: Fail # inherited from VM
 Language/15_Reference/1_Lexical_Rules_A02_t06: Fail # inherited from dart2js
 LibTest/core/Date/Date.fromMillisecondsSinceEpoch_A03_t01: Fail # inherited from VM
 LibTest/core/Date/Date.fromString_A03_t01: Fail, OK # Issue co19 - 121
 LibTest/core/Date/toString_A02_t01: Fail, OK # inherited from VM
 LibTest/core/Date/year_A01_t01: Fail, OK # inherited from VM
 LibTest/core/double/INFINITY_A01_t02: Fail # inherited from VM
 LibTest/core/double/NEGATIVE_INFINITY_A01_t02: Fail # inherited from VM
 LibTest/core/double/toRadixString_A01_t01: Fail # inherited from VM
@@ skipping 52 matching lines @@
 # Partially implemented redirecting constructors makes this fail.
 Language/07_Classes/6_Constructors/2_Factories_A01_t05: Fail
 
 [ $compiler == dart2dart && $system == windows ]
 LibTest/core/double/operator_remainder_A01_t04: Fail # Result is NaN
 LibTest/core/double/round_A01_t01: Fail # Result is NaN
 LibTest/core/int/operator_remainder_A01_t02: Fail # Result is NaN
 LibTest/core/int/remainder_A01_t02: Fail # Result is NaN
 LibTest/core/double/remainder_A01_t04: Fail # Result is NaN
 LibTest/core/Math/atan2_A01_t03: Fail # Result is NaN