From a2795852cd29f7fcf7095680ef48aa6894a14cc1 Mon Sep 17 00:00:00 2001
From: Sergey Sharybin <sergey@blender.org>
Date: Mon, 10 Jun 2024 11:45:01 +0200
Subject: [PATCH] Fix ##122962: Regression: Backdrop update triggers crash

Pull Request: https://projects.blender.org/blender/blender/pulls/122991
---
 source/blender/compositor/operations/COM_ViewerOperation.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/source/blender/compositor/operations/COM_ViewerOperation.cc b/source/blender/compositor/operations/COM_ViewerOperation.cc
index 6d2df173499..35c06f3ab31 100644
--- a/source/blender/compositor/operations/COM_ViewerOperation.cc
+++ b/source/blender/compositor/operations/COM_ViewerOperation.cc
@@ -165,6 +165,10 @@ void ViewerOperation::update_memory_buffer_finished(MemoryBuffer * /*output*/,
                                                     const rcti & /*area*/,
                                                     Span<MemoryBuffer *> /*inputs*/)
 {
+  if (!image_) {
+    return;
+  }
+
   const std::unique_ptr<MetaData> meta_data =
       this->get_input_socket(0)->get_reader()->get_meta_data();