2011-09-09 Pedro Alves <pedro@codesourcery.com>

* linux-nat.c (lin_lwp_attach_lwp): Return 1 (ignore) instead of
	-1 (error), if the lwp exits right after attaching.

gdb/ChangeLog

@@ -1,3 +1,8 @@
+2011-09-09  Pedro Alves  <pedro@codesourcery.com>
+
+	* linux-nat.c (lin_lwp_attach_lwp): Return 1 (ignore) instead of
+	-1 (error), if the lwp exits right after attaching.
+
 2011-09-08  Doug Evans  <dje@google.com>
 
 	* py-cmd.c: Some minor formatting fixes.

gdb/linux-nat.c

@@ -1479,7 +1479,7 @@ lin_lwp_attach_lwp (ptid_t ptid)
       if (!WIFSTOPPED (status))
 	{
 	  restore_child_signals_mask (&prev_mask);
-	  return -1;
+	  return 1;
 	}
 
       lp = add_lwp (ptid);