Correctly clear story instances on deletion.

Telegram/SourceFiles/data/data_stories.cpp

@@ -723,6 +723,16 @@ void Stories::applyDeleted(FullStoryId id) {
 			}
 			_owner->refreshStoryItemViews(id);
 			Assert(!_pollingSettings.contains(story.get()));
+			if (const auto j = _items.find(id.peer); j != end(_items)) {
+				const auto k = j->second.find(id.story);
+				if (k != end(j->second)) {
+					Assert(!k->second.lock());
+					j->second.erase(k);
+					if (j->second.empty()) {
+						_items.erase(j);
+					}
+				}
+			}
 			if (i->second.empty()) {
 				_stories.erase(i);
 			}

Telegram/SourceFiles/info/media/info_media_list_widget.cpp

@@ -548,6 +548,7 @@ void ListWidget::refreshRows() {
 	resizeToWidth(width());
 	restoreScrollState();
 	mouseActionUpdate();
+	update();
 }
 
 bool ListWidget::preventAutoHide() const {
@@ -1942,6 +1943,7 @@ void ListWidget::applyDragSelection(SelectedMap &applyTo) const {
 
 void ListWidget::refreshHeight() {
 	resize(width(), recountHeight());
+	update();
 }
 
 int ListWidget::recountHeight() {

Telegram/SourceFiles/info/stories/info_stories_provider.cpp

@@ -10,6 +10,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "info/media/info_media_widget.h"
 #include "info/media/info_media_list_section.h"
 #include "info/info_controller.h"
+#include "data/data_changes.h"
 #include "data/data_document.h"
 #include "data/data_media_types.h"
 #include "data/data_session.h"
@@ -54,6 +55,14 @@ Provider::Provider(not_null<AbstractController*> controller)
 			layout.second.item->invalidateCache();
 		}
 	}, _lifetime);
+
+	_peer->session().changes().storyUpdates(
+		Data::StoryUpdate::Flag::Destroyed
+	) | rpl::filter([=](const Data::StoryUpdate &update) {
+		return update.story->peer()  == _peer;
+	}) | rpl::start_with_next([=](const Data::StoryUpdate &update) {
+		storyRemoved(update.story);
+	}, _lifetime);
 }
 
 Provider::~Provider() {
@@ -253,15 +262,17 @@ bool Provider::isAfter(
 	return (a->id < b->id);
 }
 
-void Provider::itemRemoved(not_null<const HistoryItem*> item) {
-	const auto id = StoryIdFromMsgId(item->id);
-	if (const auto i = _layouts.find(id); i != end(_layouts)) {
+void Provider::storyRemoved(not_null<Data::Story*> story) {
+	Expects(story->peer() == _peer);
+
+	if (const auto i = _layouts.find(story->id()); i != end(_layouts)) {
 		_peer->owner().stories().unregisterPolling(
-			{ _peer->id, id },
+			story,
 			Data::Stories::Polling::Chat);
 		_layoutRemoved.fire(i->second.item.get());
 		_layouts.erase(i);
 	}
+	_items.remove(story->id());
 }
 
 BaseLayout *Provider::getLayout(

Telegram/SourceFiles/info/stories/info_stories_provider.h

@@ -16,6 +16,10 @@ class HistoryItem;
 class PeerData;
 class History;
 
+namespace Data {
+class Story;
+} // namespace Data
+
 namespace Info {
 class AbstractController;
 } // namespace Info
@@ -97,7 +101,7 @@ private:
 		not_null<const Media::BaseLayout*> item,
 		not_null<const Media::BaseLayout*> previous) override;
 
-	void itemRemoved(not_null<const HistoryItem*> item);
+	void storyRemoved(not_null<Data::Story*> story);
 	void markLayoutsStale();
 	void clearStaleLayouts();
 	void clear();