Make sure that the d8 shell calls OnExit in case of exceptions.

src/d8.cc

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 568 matching lines @@
         // Ignore any -f flags for compatibility with other stand-alone
         // JavaScript engines.
         continue;
       } else if (strncmp(str, "--", 2) == 0) {
         printf("Warning: unknown flag %s.\nTry --help for options\n", str);
       } else if (strcmp(str, "-e") == 0 && i + 1 < argc) {
         // Execute argument given to -e option directly.
         v8::HandleScope handle_scope;
         v8::Handle<v8::String> file_name = v8::String::New("unnamed");
         v8::Handle<v8::String> source = v8::String::New(argv[i + 1]);
-        if (!ExecuteString(source, file_name, false, true))
+        if (!ExecuteString(source, file_name, false, true)) {
+          OnExit();
           return 1;
+        }
         i++;
       } else if (strcmp(str, "-p") == 0 && i + 1 < argc) {
         int size = 0;
         const char *files = ReadChars(argv[++i], &size);
         if (files == NULL) return 1;
         ShellThread *thread =
             new ShellThread(threads.length(),
                             i::Vector<const char>(files, size));
         thread->Start();
         threads.Add(thread);
       } else {
         // Use all other arguments as names of files to load and run.
         HandleScope handle_scope;
         Handle<String> file_name = v8::String::New(str);
         Handle<String> source = ReadFile(str);
         if (source.IsEmpty()) {
           printf("Error reading '%s'\n", str);
           return 1;
         }
-        if (!ExecuteString(source, file_name, false, true))
+        if (!ExecuteString(source, file_name, false, true)) {
+          OnExit();
           return 1;
+        }
       }
     }
 
     // Start preemption if threads have been created and preemption is enabled.
     if (threads.length() > 0 && use_preemption) {
       Locker::StartPreemption(preemption_interval);
     }
 
     // Run the remote debugger if requested.
     if (i::FLAG_remote_debugger) {
@@ skipping 22 matching lines @@
   return 0;
 }
 
 
 }  // namespace v8
 
 
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }