Here's what causes the crash:
- overlay-scrollbar's gtk_module_init() does this:
widget_class = g_type_class_ref (GTK_TYPE_SCROLLBAR)
pre_hijacked_scrollbar_grab_notify = widget_class->grab_notify;
In GTK+ 3.14 widget_class->grab_notify for GTK_TYPE_SCROLLBAR is NULL.
- overlay-scrollbar's patch_scrollbar_class_vtable() does this:
if (widget_class->grab_notify == pre_hijacked_scrollbar_grab_notify)
widget_class->grab_notify = hijacked_scrollbar_grab_notify;
Since widget_class->grab_notify is still NULL and it is equal to
pre_hijacked_scrollbar_grab_notify, we install our own signal handler.
- overlay-scrollbar's hijacked_scrollbar_grab_notify() does this:
if (use_overlay_scrollbar ())
return;
(* pre_hijacked_scrollbar_grab_notify) (widget, was_grabbed);
Since in Ubuntu GNOME use_overlay_scrollbar() returns a false value
due, this code calls a NULL pointer and segfaults.
A more future-proof fix would be to check all pre_hijacked_ handlers
before calling them.
** Also affects: overlay-scrollbar
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1386255
Title:
devhelp and many other apps crash with SIGSEGV in g_closure_invoke()
due to overlay-scrollbars
To manage notifications about this bug go to:
https://bugs.launchpad.net/overlay-scrollbar/+bug/1386255/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
