all: fix memory leaks

src/ifs/wl_seat/event_handling.rs

@@ -154,6 +154,13 @@ impl NodeSeatState {
         self.dnd_targets.remove(&seat.id);
         self.pointer_grabs.remove(&seat.id);
     }
+
+    pub fn clear(&self) {
+        self.kb_foci.clear();
+        self.pointer_foci.clear();
+        self.dnd_targets.clear();
+        self.pointer_grabs.clear();
+    }
 }
 
 impl WlSeatGlobal {

src/ifs/wl_surface.rs

@@ -697,6 +697,8 @@ impl Object for WlSurface {
         self.buffer.set(None);
         self.toplevel.set(None);
         self.idle_inhibitors.clear();
+        self.pending.presentation_feedback.borrow_mut().clear();
+        self.presentation_feedback.borrow_mut().clear();
     }
 }
 

src/ifs/wl_surface/wl_subsurface.rs

@@ -140,6 +140,7 @@ impl WlSubsurface {
     fn destroy(&self, parser: MsgParser<'_, '_>) -> Result<(), WlSubsurfaceError> {
         let _req: Destroy = self.surface.client.parse(self, parser)?;
         self.surface.unset_ext();
+        *self.pending.node.borrow_mut() = None;
         *self.node.borrow_mut() = None;
         {
             let mut children = self.parent.children.borrow_mut();
@@ -257,6 +258,11 @@ impl Object for WlSubsurface {
     fn num_requests(&self) -> u32 {
         SET_DESYNC + 1
     }
+
+    fn break_loops(&self) {
+        *self.pending.node.borrow_mut() = None;
+        *self.node.borrow_mut() = None;
+    }
 }
 
 simple_add_obj!(WlSubsurface);