From cc43fe5191a27c23b1d707a6298438ca58804066 Mon Sep 17 00:00:00 2001
From: Daniel Imms <2193314+Tyriar@users.noreply.github.com>
Date: Sun, 10 Sep 2023 08:19:46 -0700
Subject: [PATCH] Fix possible exception when disposing terminal

Fixes #4757
---
 src/browser/services/RenderService.ts | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/browser/services/RenderService.ts b/src/browser/services/RenderService.ts
index 0f18a233..e6d259c2 100644
--- a/src/browser/services/RenderService.ts
+++ b/src/browser/services/RenderService.ts
@@ -203,11 +203,14 @@ export class RenderService extends Disposable implements IRenderService {
 
   public setRenderer(renderer: IRenderer): void {
     this._renderer.value = renderer;
-    this._renderer.value.onRequestRedraw(e => this.refreshRows(e.start, e.end, true));
+    // If the value was not set, the terminal is being disposed so ignore it
+    if (this._renderer.value) {
+      this._renderer.value.onRequestRedraw(e => this.refreshRows(e.start, e.end, true));
 
-    // Force a refresh
-    this._needsSelectionRefresh = true;
-    this._fullRefresh();
+      // Force a refresh
+      this._needsSelectionRefresh = true;
+      this._fullRefresh();
+    }
   }
 
   public addRefreshCallback(callback: FrameRequestCallback): number {