From 35f0f87f730fc16af5ae6fd5c90d35721c8c7a7d Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Tue, 25 Jul 2023 20:24:13 +0400
Subject: [PATCH] Fix possible crash in story deletion.

Fixes #26571.
---
 .../SourceFiles/media/stories/media_stories_controller.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Telegram/SourceFiles/media/stories/media_stories_controller.cpp b/Telegram/SourceFiles/media/stories/media_stories_controller.cpp
index b94484a59..42cf67c5a 100644
--- a/Telegram/SourceFiles/media/stories/media_stories_controller.cpp
+++ b/Telegram/SourceFiles/media/stories/media_stories_controller.cpp
@@ -872,9 +872,10 @@ bool Controller::changeShown(Data::Story *story) {
 	if (_shown == id && !sessionChanged) {
 		return false;
 	}
-	if (const auto now = this->story()) {
-		now->owner().stories().unregisterPolling(
-			now,
+	if (_shown) {
+		Assert(_session != nullptr);
+		_session->data().stories().unregisterPolling(
+			_shown,
 			Data::Stories::Polling::Viewer);
 	}
 	if (sessionChanged) {