From 8078db5fd56643cf6f34937eb2765a9a1bc7a6d9 Mon Sep 17 00:00:00 2001
From: "Dustin L. Howett" <duhowett@microsoft.com>
Date: Tue, 13 Apr 2021 14:17:43 -0700
Subject: [PATCH] Only update render appearance settings if there's a renderer
 (#9798)

I ran into this crash when I just opened a new tab.

Fixes MSFT-32485023

(cherry picked from commit dab52c46a25eba20607b98d16fb0c786e66407c3)
---
 src/cascadia/TerminalControl/TermControl.cpp | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/cascadia/TerminalControl/TermControl.cpp b/src/cascadia/TerminalControl/TermControl.cpp
index da4b256e70c..a0e56a650de 100644
--- a/src/cascadia/TerminalControl/TermControl.cpp
+++ b/src/cascadia/TerminalControl/TermControl.cpp
@@ -481,11 +481,14 @@ namespace winrt::Microsoft::Terminal::Control::implementation
         // Update the terminal core with its new Core settings
         _terminal->UpdateAppearance(newAppearance);
 
-        // Update DxEngine settings under the lock
-        _renderEngine->SetSelectionBackground(til::color{ newAppearance.SelectionBackground() });
-        _renderEngine->SetRetroTerminalEffect(newAppearance.RetroTerminalEffect());
-        _renderEngine->SetPixelShaderPath(newAppearance.PixelShaderPath());
-        _renderer->TriggerRedrawAll();
+        if (_renderEngine)
+        {
+            // Update DxEngine settings under the lock
+            _renderEngine->SetSelectionBackground(til::color{ newAppearance.SelectionBackground() });
+            _renderEngine->SetRetroTerminalEffect(newAppearance.RetroTerminalEffect());
+            _renderEngine->SetPixelShaderPath(newAppearance.PixelShaderPath());
+            _renderer->TriggerRedrawAll();
+        }
     }
 
     // Method Description: