Compiler panicked

rustc 1.58.0-nightly (dd549dcab 2021-11-25) running on x86_64-pc-windows-msvc

src/ui/toggle_switch.rs

@@ -1,4 +1,7 @@
-use bevy::{ecs::query::QueryEntityError, prelude::*};
+use bevy::{
+    ecs::query::{FilterFetch, QueryEntityError, QueryItem, WorldQuery},
+    prelude::*,
+};
 
 pub struct ToggleSwitchPlugin;
 
@@ -151,16 +154,11 @@ fn toggle(
         let is_enabled = !toggle_state.0;
         toggle_state.0 = is_enabled;
 
-        let rr = children
-            .first()
-            .ok_or(QueryEntityError::NoSuchEntity)
-            .and_then(|child| slider_keepers_query.get_mut(*child))
+        let rr = first_child(slider_keepers_query)(children)
             .map(update_slider_keeper(is_enabled))
-            .and_then(|children| children.first().ok_or(QueryEntityError::NoSuchEntity))
-            .and_then(|child| sliders_query.get_mut(*child))
+            .and_then(first_child(sliders_query))
             .map(update_slider_border(&is_enabled, &materials))
-            .and_then(|children| children.first().ok_or(QueryEntityError::NoSuchEntity))
-            .and_then(|child| slider_body_query.get_mut(*child))
+            .and_then(first_child(slider_body_query))
             .map(update_clider_body(&is_enabled, &materials));
 
         if let Err(err) = rr {
@@ -171,6 +169,18 @@ fn toggle(
     }
 }
 
+fn first_child<'w, 's, Q: WorldQuery, F: WorldQuery>(
+    query: Query<'w, 's, Q, F>,
+) -> impl FnOnce(&Children) -> Result<QueryItem<Q>, QueryEntityError>
+where
+    F::Fetch: FilterFetch,
+{
+    move |children| children
+    .first()
+    .ok_or(QueryEntityError::NoSuchEntity)
+    .and_then(|child| query.get_mut(*child))
+}
+
 fn does_cursor_hover_element(
     size: Size<Val>,
     global_transform: &GlobalTransform,