[Bug libgomp/81591] segmentation fault when using priorities of nested tasks

["sistek at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81591

--- Comment #2 from Jakub Sistek <sistek at seznam dot cz> ---
With the _LIBGOMP_CHECKING_ enabled, I am getting

libgomp: priority_tree_next_task: t1 != t2

Best wishes,

Jakub Sistek


(In reply to Richard Biener from comment #1)
> There's
> 
> static void inline
> priority_queue_downgrade_task (enum priority_queue_type type,
>                                struct priority_queue *head,
>                                struct gomp_task *task)
> {
> #if _LIBGOMP_CHECKING_
>   if (!priority_queue_task_in_queue_p (type, head, task))
>     gomp_fatal ("Attempt to downgrade missing task %p", task);
> #endif
>   if (priority_queue_multi_p (head))
>     {
>       struct priority_list *list
>         = priority_queue_lookup_priority (head, task->priority);
>       priority_list_downgrade_task (type, list, task);
> 
> so maybe you can build libgomp with _LIBGOMP_CHECKING_ to help track this
> down?
> (just change libgomp/libgomp.h)