Fix crash during error reporting during bootstrapping.

src/top.cc

 // Copyright 2006-2008 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 672 matching lines @@
       Handle<Script> casted_script(Script::cast(script));
       *target = MessageLocation(casted_script, pos, pos + 1);
     }
   }
 }
 
 
 void Top::ReportUncaughtException(Handle<Object> exception,
                                   MessageLocation* location,
                                   Handle<String> stack_trace) {
-  Handle<Object> message =
-    MessageHandler::MakeMessageObject("uncaught_exception",
-                                      location,
-                                      HandleVector<Object>(&exception, 1),
-                                      stack_trace);
-
+  Handle<Object> message;
+  if (!Bootstrapper::IsActive()) {
+    // It's not safe to try to make message objects while the bootstrapper
+    // is active since the infrastructure may not have been properly
+    // initialized.
+    message =
+      MessageHandler::MakeMessageObject("uncaught_exception",
+                                        location,
+                                        HandleVector<Object>(&exception, 1),
+                                        stack_trace);
+  }
   // Report the uncaught exception.
   MessageHandler::ReportMessage(location, message);
 }
 
 
 bool Top::ShouldReturnException(bool* is_caught_externally,
                                 bool catchable_by_javascript) {
   // Find the top-most try-catch handler.
   StackHandler* handler =
       StackHandler::FromAddress(Top::handler(Top::GetCurrentThread()));
@@ skipping 53 matching lines @@
   MessageLocation potential_computed_location;
   bool try_catch_needs_message =
       is_caught_externally &&
       thread_local_.try_catch_handler_->capture_message_;
   if (report_exception || try_catch_needs_message) {
     if (location == NULL) {
       // If no location was specified we use a computed one instead
       ComputeLocation(&potential_computed_location);
       location = &potential_computed_location;
     }
-    Handle<String> stack_trace;
-    if (FLAG_trace_exception) stack_trace = StackTrace();
-    message_obj = MessageHandler::MakeMessageObject("uncaught_exception",
-        location, HandleVector<Object>(&exception_handle, 1), stack_trace);
+    if (!Bootstrapper::IsActive()) {
+      // It's not safe to try to make message objects or collect stack
+      // traces while the bootstrapper is active since the infrastructure
+      // may not have been properly initialized.
+      Handle<String> stack_trace;
+      if (FLAG_trace_exception) stack_trace = StackTrace();
+      message_obj = MessageHandler::MakeMessageObject("uncaught_exception",
+          location, HandleVector<Object>(&exception_handle, 1), stack_trace);
+    }
   }
 
   // Save the message for reporting if the the exception remains uncaught.
   thread_local_.has_pending_message_ = report_exception;
   thread_local_.pending_message_ = message;
   if (!message_obj.is_null()) {
     thread_local_.pending_message_obj_ = *message_obj;
     if (location != NULL) {
       thread_local_.pending_message_script_ = *location->script();
       thread_local_.pending_message_start_pos_ = location->start_pos();
@@ skipping 177 matching lines @@
   Top::break_access_->Lock();
 }
 
 
 ExecutionAccess::~ExecutionAccess() {
   Top::break_access_->Unlock();
 }
 
 
 } }  // namespace v8::internal