Fix 16099: Invocation's positionalArguments contains an immutable array.

runtime/lib/invocation_mirror_patch.dart

 // 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.
 
 class _InvocationMirror implements Invocation {
   // Constants describing the invocation type.
   // _FIELD cannot be generated by regular invocation mirrors.
   static const int _METHOD = 0;
   static const int _GETTER = 1;
   static const int _SETTER = 2;
@@ skipping 49 matching lines @@
   }
 
   List get positionalArguments {
     if (_positionalArguments == null) {
       int numPositionalArguments = _argumentsDescriptor[1];
       // Don't count receiver.
       if (numPositionalArguments == 1) {
         return _positionalArguments = const [];
       }
       // Exclude receiver.
-      _positionalArguments = _arguments.sublist(1, numPositionalArguments);
+      _positionalArguments =
+          new _ImmutableList._from(_arguments, 1, numPositionalArguments - 1);
     }
     return _positionalArguments;
   }
 
   Map<Symbol, dynamic> get namedArguments {
     if (_namedArguments == null) {
       int numArguments = _argumentsDescriptor[0] - 1;  // Exclude receiver.
       int numPositionalArguments = _argumentsDescriptor[1] - 1;
       int numNamedArguments = numArguments - numPositionalArguments;
       if (numNamedArguments == 0) {
@@ skipping 46 matching lines @@
   static _allocateInvocationMirror(String functionName,
                                    List argumentsDescriptor,
                                    List arguments,
                                    bool isSuperInvocation) {
     return new _InvocationMirror(functionName,
                                  argumentsDescriptor,
                                  arguments,
                                  isSuperInvocation);
   }
 }