From e3291b515d7509fa5adab0c233657e64f21cf4ae Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Pasteau?=
 <4895034+ClementPasteau@users.noreply.github.com>
Date: Thu, 16 Nov 2023 15:55:58 +0100
Subject: [PATCH] Check existence of elements before destroying (#5913)

Do not show in changelog
---
 newIDE/app/src/InstancesEditor/index.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/newIDE/app/src/InstancesEditor/index.js b/newIDE/app/src/InstancesEditor/index.js
index 21b120d0a9..1eaa7f0f47 100644
--- a/newIDE/app/src/InstancesEditor/index.js
+++ b/newIDE/app/src/InstancesEditor/index.js
@@ -484,6 +484,8 @@ export default class InstancesEditor extends Component<Props> {
     // to protect against renders after the component is unmounted.
     this._unmounted = true;
 
+    // We've seen all those elements being undefined in some cases, so
+    // by security, check that they are defined before deleting them.
     if (this.selectionRectangle) {
       this.selectionRectangle.delete();
     }
@@ -501,8 +503,12 @@ export default class InstancesEditor extends Component<Props> {
     }
     if (this.nextFrame) cancelAnimationFrame(this.nextFrame);
     stopPIXITicker();
-    this.pixiContainer.destroy();
-    this.pixiRenderer.destroy();
+    if (this.pixiContainer) {
+      this.pixiContainer.destroy();
+    }
+    if (this.pixiRenderer) {
+      this.pixiRenderer.destroy();
+    }
   }
 
   // To be updated, see https://reactjs.org/docs/react-component.html#unsafe_componentwillreceiveprops.