commit 96c731cc2dde8a3e4ba542eca4c87ed6154084d2
Author: Stanislav Brabec <sbrabec@suse.cz>
Date:   Fri Jul 9 15:11:15 2010 +0200

    Fix pointer grab dead lock if gtk_drag_begin uses GDK_CURRENT_TIME and
    release happens before getting grab.
    
    For more see https://bugzilla.gnome.org/show_bug.cgi?id=623865

diff --git a/gtk/gtkdnd.c b/gtk/gtkdnd.c
index a0d878d..48063a5 100644
--- a/gtk/gtkdnd.c
+++ b/gtk/gtkdnd.c
@@ -4065,6 +4065,10 @@ gtk_drag_end (GtkDragSourceInfo *info, guint32 time)
   pointer = gdk_drag_context_get_device (info->context);
   keyboard = gdk_device_get_associated_device (pointer);
 
+  /* Prevent grab after release (see bug 623865) */
+  if (info->grab_time == GDK_CURRENT_TIME)
+    time = GDK_CURRENT_TIME;
+
   if (info->update_idle)
     {
       g_source_remove (info->update_idle);