Print out line number and extension name when compilation of an extension fails.

src/isolate.cc

 // Copyright 2011 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 1054 matching lines @@
       Handle<JSArray> stack_trace_object;
       if (report_exception && capture_stack_trace_for_uncaught_exceptions_) {
           stack_trace_object = CaptureCurrentStackTrace(
               stack_trace_for_uncaught_exceptions_frame_limit_,
               stack_trace_for_uncaught_exceptions_options_);
       }
       ASSERT(is_object);  // Can't use the handle unless there's a real object.
       message_obj = MessageHandler::MakeMessageObject("uncaught_exception",
           location, HandleVector<Object>(&exception_handle, 1), stack_trace,
           stack_trace_object);
+    } else if (location != NULL && !location->script().is_null()) {
+      // We are bootstrapping and caught and error where the location is set

[Mads Ager (chromium), 2011/10/25 13:41:00]

and error -> an error 

+      // and we have a script for the location.
+      // In this case we could have an extension (or an internal error
+      // somewhere) and we print out the line number at which the error occured
+      // to the console for easier debugging.
+      int line_number = GetScriptLineNumberSafe(location->script(),
+                                                location->start_pos());
+      OS::PrintError("Extension or internal compilation error at line %d.\n",
+                     line_number);
     }
   }
 
   // Save the message for reporting if the the exception remains uncaught.
   thread_local_top()->has_pending_message_ = report_exception;
   if (!message_obj.is_null()) {
     thread_local_top()->pending_message_obj_ = *message_obj;
     if (location != NULL) {
       thread_local_top()->pending_message_script_ = *location->script();
       thread_local_top()->pending_message_start_pos_ = location->start_pos();
@@ skipping 805 matching lines @@
 
 #ifdef DEBUG
 #define ISOLATE_FIELD_OFFSET(type, name, ignored)                       \
 const intptr_t Isolate::name##_debug_offset_ = OFFSET_OF(Isolate, name##_);
 ISOLATE_INIT_LIST(ISOLATE_FIELD_OFFSET)
 ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET)
 #undef ISOLATE_FIELD_OFFSET
 #endif
 
 } }  // namespace v8::internal