From dc1aec5673183998128a1ce6251a39d16b0c8194 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20M=C3=BCllner?= <fmuellner@gnome.org>
Date: Thu, 8 Jul 2021 20:42:55 +0200
Subject: [PATCH] overviewControls: Fix warning on shutdown

ClutterActor unsets its layout manager's :container property during
dispose, so the corresponding vfunc should handle being passed NULL.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1909>
---
 js/ui/overviewControls.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/js/ui/overviewControls.js b/js/ui/overviewControls.js
index 88726573d..c15316169 100644
--- a/js/ui/overviewControls.js
+++ b/js/ui/overviewControls.js
@@ -112,7 +112,8 @@ class ControlsManagerLayout extends Clutter.BoxLayout {
 
     vfunc_set_container(container) {
         this._container = container;
-        this.hookup_style(container);
+        if (container)
+            this.hookup_style(container);
     }
 
     vfunc_get_preferred_width(_container, _forHeight) {