Don't try to notify about task termination on the thread that started the task

if it has already finished executing.

ChangeLog

@@ -2,6 +2,8 @@
 
 	* Source/NSThread.m: Improve exception message when performing a
 	selector on a finished thread.
+	* Source/NSTask.m: Do not try to notify task completion on a thread
+	that is not executing.
 	* configure.ac: Fix for older versions of pkg-config
 	* configure: regenerate
 

Source/NSTask.m

@@ -414,11 +414,7 @@ pty_slave(const char* name)
  */
 - (void) launch
 {
-  if (_launchingThread != [NSThread currentThread])
-    {
-      [_launchingThread release];
-      _launchingThread = [[NSThread currentThread] retain];
-    }
+  ASSIGN(_launchingThread, [NSThread currentThread]);
 }
 
 /**
@@ -937,7 +933,7 @@ pty_slave(const char* name)
   if (_hasNotified == NO)
     {
       _hasNotified = YES;
-      if (_launchingThread != nil)
+      if ([_launchingThread isExecuting] == YES)
 	{
 	  [self performSelector: @selector(_notifyOfTermination)
 		       onThread: _launchingThread

Source/NSThread.m

@@ -1690,9 +1690,10 @@ GSRunLoopInfoForThread(NSThread *aThread)
       if ([aThread isFinished] == YES)
         {
           [NSException raise: NSInternalInconsistencyException
-            format: @"perform [%@-%@] attempted on finished thread",
+            format: @"perform [%@-%@] attempted on finished thread (%@)",
             NSStringFromClass([self class]),
-            NSStringFromSelector(aSelector)];
+            NSStringFromSelector(aSelector),
+            aThread];
         }
       if (aFlag == YES)
 	{