backend/multi: handle backends depending on each other properly
wl_list_for_each_safe only allows the current list item to be removed. If a backend destroys itself when another backend is destroyed, this blows up.
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@ -49,8 +49,11 @@ static void multi_backend_destroy(struct wlr_backend *wlr_backend) {
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wl_list_remove(&backend->display_destroy.link);
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struct subbackend_state *sub, *next;
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wl_list_for_each_safe(sub, next, &backend->backends, link) {
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// Some backends may depend on other backends, ie. destroying a backend may
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// also destroy other backends
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while (!wl_list_empty(&backend->backends)) {
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struct subbackend_state *sub =
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wl_container_of(backend->backends.next, sub, link);
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wlr_backend_destroy(sub->backend);
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}
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