Fix http://dartbug.com/23578:

runtime/bin/main.cc

 // 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.
 
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 
 #include "include/dart_api.h"
 #include "include/dart_debugger_api.h"
@@ skipping 561 matching lines @@
     Dart_ExitScope();                                                          \
     Dart_ShutdownIsolate();                                                    \
     return NULL;                                                               \
   }                                                                            \
 
 
 // Returns true on success, false on failure.
 static Dart_Isolate CreateIsolateAndSetupHelper(const char* script_uri,
                                                 const char* main,
                                                 const char* package_root,
+                                                Dart_IsolateFlags* flags,
                                                 char** error,
                                                 int* exit_code) {
   ASSERT(script_uri != NULL);
   IsolateData* isolate_data = new IsolateData(script_uri, package_root);
   Dart_Isolate isolate = NULL;
 
   isolate = Dart_CreateIsolate(script_uri,
                                main,
                                isolate_snapshot_buffer,
+                               flags,
                                isolate_data,
                                error);
 
   if (isolate == NULL) {
     return NULL;
   }
 
   Dart_EnterScope();
 
   if (isolate_snapshot_buffer != NULL) {
@@ skipping 65 matching lines @@
   }
 
   return isolate;
 }
 
 #undef CHECK_RESULT
 
 static Dart_Isolate CreateIsolateAndSetup(const char* script_uri,
                                           const char* main,
                                           const char* package_root,
+                                          Dart_IsolateFlags* flags,
                                           void* data, char** error) {
+  // The VM should never call the isolate helper with a NULL flags.
+  ASSERT(flags != NULL);
+  ASSERT(flags->version == DART_FLAGS_CURRENT_VERSION);
   IsolateData* parent_isolate_data = reinterpret_cast<IsolateData*>(data);
   int exit_code = 0;
   if (script_uri == NULL) {
     if (data == NULL) {
       *error = strdup("Invalid 'callback_data' - Unable to spawn new isolate");
       return NULL;
     }
     script_uri = parent_isolate_data->script_url;
     if (script_uri == NULL) {
       *error = strdup("Invalid 'callback_data' - Unable to spawn new isolate");
       return NULL;
     }
   }
   if (package_root == NULL) {
     if (parent_isolate_data != NULL) {
       package_root = parent_isolate_data->package_root;
     } else {
       package_root = ".";
     }
   }
   return CreateIsolateAndSetupHelper(script_uri,
                                      main,
                                      package_root,
+                                     flags,
                                      error,
                                      &exit_code);
 }
 
 
 static void PrintVersion() {
   Log::PrintErr("Dart VM version: %s\n", Dart_VersionString());
 }
 
 
@@ skipping 250 matching lines @@
         "getIO", &ServiceGetIOHandler, NULL);
 
   // Call CreateIsolateAndSetup which creates an isolate and loads up
   // the specified application script.
   char* error = NULL;
   int exit_code = 0;
   char* isolate_name = BuildIsolateName(script_name, "main");
   Dart_Isolate isolate = CreateIsolateAndSetupHelper(script_name,
                                                      "main",
                                                      commandline_package_root,
+                                                     NULL,
                                                      &error,
                                                      &exit_code);
   if (isolate == NULL) {
     Log::PrintErr("%s\n", error);
     free(error);
     delete [] isolate_name;
     exit((exit_code != 0) ? exit_code : kErrorExitCode);
   }
   delete [] isolate_name;
 
@@ skipping 114 matching lines @@
   exit(Process::GlobalExitCode());
 }
 
 }  // namespace bin
 }  // namespace dart
 
 int main(int argc, char** argv) {
   dart::bin::main(argc, argv);
   UNREACHABLE();
 }