gdb

	* value.c (release_value): Clear 'next' pointer.
	* breakpoint.c (watch_command_1): Add 'just_location' argument.
	(watch_command_wrapper): Update.
	(watch_maybe_just_location): New function.
	(watch_command): Update.
	(rwatch_command_wrapper): Update.
	(rwatch_command): Update.
	(awatch_command_wrapper): Update.
	(awatch_command): Update.
	(check_for_argument): New function.
	(_initialize_breakpoint): Update help text.
gdb/testsuite
	* gdb.base/help.exp: Update.
	* gdb.base/watchpoint.exp (test_watchpoint_and_breakpoint): Delete
	watchpoint.
	(test_watch_location): New proc.
	(test_watchpoint_in_big_blob): Delete watchpoint.
	* gdb.base/watchpoint.c (func5): New function.
	(main): Call it.
gdb/doc
	* gdb.texinfo (Set Watchpoints): Document -location option.

1 files changed, 2 insertions, 0 deletions

diff --git a/gdb/value.c b/gdb/value.c
index b65ba32eb39..d1c37e37c2d 100644
--- a/gdb/value.c
+++ b/gdb/value.c
@@ -747,6 +747,7 @@ release_value (struct value *val)
   if (all_values == val)
     {
       all_values = val->next;
+      val->next = NULL;
       return;
     }
 
@@ -755,6 +756,7 @@ release_value (struct value *val)
       if (v->next == val)
 	{
 	  v->next = val->next;
+	  val->next = NULL;
 	  break;
 	}
     }