If this function is called recursively, it will free the list of post
callbacks before the list stops being used, which will cause a segfault.
The only place where this seems to happen is on
https://phab.enlightenment.org/T124, probably due to the extensive mouse
events which are launched in an unexpected way.
This bug started happening after commit
164cc07237395f8fe6efa465e4f0c0c4863f78ed, where the
_elm_scroll_page_x_get() started being called by a post_event callback,
and forcing an edje recalc. This recalc triggered another post_event
callback, thus causing the mentioned segfault.
If there's a better way to prevent this from happening, please change
the mentioned code.
{
Evas_Post_Callback *pc;
int skip = 0;
+ static int first_run = 1; // FIXME: This is a workaround to prevent this
+ // function from being called recursively.
- if (e->delete_me) return;
+ if (e->delete_me || (!first_run)) return;
_evas_walk(e);
+ first_run = 0;
EINA_LIST_FREE(e->post_events, pc)
{
if ((!skip) && (!e->delete_me) && (!pc->delete_me))
}
EVAS_MEMPOOL_FREE(_mp_pc, pc);
}
+ first_run = 1;
_evas_unwalk(e);
}