Fix for issue 13272

tests/co19/co19-analyzer.status

 # Copyright (c) 2013, 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 == dartanalyzer ]
 # not clear: g([var foo = foo + 10]) is parameter 'foo' in the scope of its own initialzer?
 Language/06_Functions/2_Formal_Parameters_A02_t02: fail
 
 # not clear: null..[1](1)[2](2).foo(3, bar: 4)=5 - it seems that verything before =5 it not assignable
 Language/07_Classes/6_Constructors/1_Generative_Constructors_A04_t15: fail
@@ skipping 72 matching lines @@
 Language/13_Statements/04_Local_Function_Declaration_A02_t02: fail, OK
 Language/14_Libraries_and_Scripts/1_Imports_A02_t12: fail, OK
 Language/14_Libraries_and_Scripts/1_Imports_A02_t15: fail, OK
 
 # co19 issue #513, rules for finals were loosened, contradiction in spec was fixed
 Language/07_Classes/6_Constructors/1_Generative_Constructors_A21_t01: fail, OK
 
 # co19 issue #515, it is a compile-time error if there is more than one entity with the same name declared in the same scope
 Language/07_Classes/3_Setters_A08_t03: fail, OK
 
+# co19 issue #593: Conditional expressions are now allowed as constant expressions
+Language/12_Expressions/01_Constants_A15_t16: fail, OK
+
 # co19 issue #438, Static variables are initialized lazily, need not be constants
 Language/12_Expressions/01_Constants_A16_t01: fail, OK
 Language/12_Expressions/01_Constants_A16_t02: fail, OK
 
 # co19 issue #420, "throw" requires expression, "rethrow" should be used instead
 Language/12_Expressions/08_Throw_A05_t01: fail, OK
 Language/12_Expressions/08_Throw_A05_t02: fail, OK
 Language/12_Expressions/08_Throw_A05_t03: fail, OK
 
 # co19 issue #454 (wrongly closed)
@@ skipping 135 matching lines @@
 
 # co19 issue #586: Undefined name 'message'
 LibTest/isolate/IsolateSink/addError_A01_t02: fail, OK
 
 # co19 issue #587: Missing dart:async import and other mistypes
 LibTest/isolate/IsolateStream/any_A02_t01: fail, OK
 LibTest/isolate/IsolateStream/asBroadcastStream_A01_t01: fail, OK
 LibTest/isolate/IsolateStream/contains_A01_t01: fail, OK
 LibTest/isolate/IsolateStream/contains_A02_t01: fail, OK
 LibTest/isolate/IsolateStream/isBroadcast_A01_t02: fail, OK