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-rw-r--r--include/wlr/types/wlr_surface.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/wlr/types/wlr_surface.h b/include/wlr/types/wlr_surface.h
index abb05600..175150f9 100644
--- a/include/wlr/types/wlr_surface.h
+++ b/include/wlr/types/wlr_surface.h
@@ -220,7 +220,8 @@ struct wlr_subsurface *wlr_subsurface_create(struct wlr_surface *surface,
struct wl_list *resource_list);
/**
- * Get the root of the subsurface tree for this surface.
+ * Get the root of the subsurface tree for this surface. Can return NULL if
+ * a surface in the tree has been destroyed.
*/
struct wlr_surface *wlr_surface_get_root_surface(struct wlr_surface *surface);