It seems that this could have been backported by now, the ticket has been open for (almost) a year now ...
In the end I got fed up with having to point the library used by Mesa/Gallium to the much newer one I also use (something kept resetting it), and uninstalled the corresponding Mesa component. Problem not solved but gone all the same (and I don't notice any difference other than that certain applications no longer crash).
It seems that this could have been backported by now, the ticket has been open for (almost) a year now ...
In the end I got fed up with having to point the library used by Mesa/Gallium to the much newer one I also use (something kept resetting it), and uninstalled the corresponding Mesa component. Problem not solved but gone all the same (and I don't notice any difference other than that certain applications no longer crash).