[glib/wip/fix-handler-leak] gsignal: Plug g_signal_connect_object leak

[Ray Strode <halfline src gnome org>]

commit d691c2ebd269e394457d6367db14cf2cc22bc281
Author: Ray Strode <rstrode redhat com>
Date:   Tue Oct 13 09:24:02 2020 -0400

    gsignal: Plug g_signal_connect_object leak
    
    commit 916297be799ee001b4a214cc52c3b960bb0b5deb added a hash table
    to provide constant time lookups of signal handlers.
    
    Unfortunately, that commit neglected to remove handlers from
    g_signal_connect_object calls from the hash table that are
    disconnected implicitly when the associated object goes away.
    
    This commit addresses that bug by changing the closure invalidate
    handler associated with the signal connection to properly remove the
    handler from the hash table.

 gobject/gsignal.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gobject/gsignal.c b/gobject/gsignal.c
index ebf5b3c1c..41599eb0d 100644
--- a/gobject/gsignal.c
+++ b/gobject/gsignal.c
@@ -3916,6 +3916,7 @@ invalid_closure_notify (gpointer  instance,
   g_assert (handler != NULL);
   g_assert (handler->closure == closure);
 
+  g_hash_table_remove (g_handlers, handler);
   handler->sequential_number = 0;
   handler->block_count = 1;
   handler_unref_R (signal_id, instance, handler);