The snapshot buffer was being released too early resulting in weird crashes.

runtime/bin/gen_snapshot.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.
 
 // Generate a snapshot file after loading all the scripts specified on the
 // command line.
 
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
@@ skipping 339 matching lines @@
       // Shutdown the isolate.
       Dart_ExitScope();
       Dart_ShutdownIsolate();
 
       // Now load the specified script and create a script snapshot.
       Dart_Isolate isolate = Dart_CreateIsolate(NULL,
                                                 NULL,
                                                 snapshot_buffer,
                                                 NULL,
                                                 &error);
-      free(snapshot_buffer);
       if (isolate == NULL) {
         fprintf(stderr, "%s", error);
         free(error);

[Ivan Posva, 2012/10/18 05:45:52]

"Leaking" the snapshot_buffer here.

[siva, 2012/10/18 17:55:43]

Fixing in a new CL.

On 2012/10/18 05:45:52, Ivan Posva wrote:

         exit(255);
       }
       Dart_EnterScope();
 
       // Setup generic library tag handler.
       result = Dart_SetLibraryTagHandler(DartUtils::LibraryTagHandler);
       CHECK_RESULT(result);
 
       // Get handle to builtin library.
       Dart_Handle builtin_lib =
           Builtin::LoadAndCheckLibrary(Builtin::kBuiltinLibrary);
       CHECK_RESULT(builtin_lib);
 
       // Prepare for script loading by setting up the 'print' and 'timer'
       // closures and setting up 'package root' for URI resolution.
       result = DartUtils::PrepareForScriptLoading(package_root, builtin_lib);
       CHECK_RESULT(result);
 
       // Load specified script.
       library = DartUtils::LoadScript(app_script_name, true, builtin_lib);
 
       // Now create and write snapshot of script.
       CreateAndWriteSnapshot(true);
+
+      free(snapshot_buffer);
     }
   } else {
     SetupForGenericSnapshotCreation();
     CreateAndWriteSnapshot(false);
   }
   return 0;
 }