[Wayland-bugs] [Bug 100878] SIGSEGV on desktop-shell focus change

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100878

--- Comment #3 from worknesday at gmail.com ---
(In reply to Daniel Stone from comment #2)
> The clue, however, is in the names of the parameters to the functions. For
> instance, you do:
>     struct wl_list list;
>     struct {
>         int something;
>         struct wl_list link;
>     } foo;
> 
>     wl_list_init(&list);
>     wl_list_insert(&list, &foo->link);
>     wl_list_remove(&foo->link);
> 
> At this point, foo has been removed from list (making its link member
> dangling), but the overall list itself is still valid. Trying to remove a
> list from itself does not make any real sense; instead, you remove an
> element from that list.

ah, I see! So, does that mean the list itself is represented as an
always-present dummy-node that resides in the list?

However, it looks like the crash occurred as a result of
es->destroy_signal.listener_list.prev being NULL. Somehow, this list ceased to
be circular (at least while traversing backwards)

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