* gold.cc (queue_middle_tasks): If no input files were opened,

exit.
	* workqueue.h (Task_function::Task_function): Assert that there is
	a blocker.

gold/ChangeLog

@@ -1,3 +1,11 @@
+2010-02-23  Viktor Kutuzov  <vkutuzov@accesssoftek.com>
+	    Ian Lance Taylor  <iant@google.com>
+
+	* gold.cc (queue_middle_tasks): If no input files were opened,
+	exit.
+	* workqueue.h (Task_function::Task_function): Assert that there is
+	a blocker.
+
 2010-02-22  Doug Kwan  <dougkwan@google.com>
 
 	* gold-threads.h (Once::~Once): Explicitly define virtual destructor.

gold/gold.cc

@@ -532,6 +532,15 @@ queue_middle_tasks(const General_options& options,
         }
     }
 
+  // If we failed to open any input files, it's possible for
+  // THIS_BLOCKER to be NULL here.  There's no real point in
+  // continuing if that happens.
+  if (this_blocker == NULL)
+    {
+      gold_assert(parameters->errors()->error_count() > 0);
+      gold_exit(false);
+    }
+
   // When all those tasks are complete, we can start laying out the
   // output file.
   // TODO(csilvers): figure out a more principled way to get the target

gold/workqueue.h

@@ -152,7 +152,7 @@ class Task_function : public Task
   Task_function(Task_function_runner* runner, Task_token* blocker,
 		const char* name)
     : runner_(runner), blocker_(blocker), name_(name)
-  { }
+  { gold_assert(blocker != NULL); }
 
   ~Task_function()
   {