Fix crash in several video removed from video call.

Telegram/SourceFiles/calls/group/calls_group_viewport.cpp

@@ -791,13 +791,13 @@ void Viewport::updateTilesGeometryColumn(int outerWidth) {
 			top += height + st::groupCallVideoSmallSkip;
 		}
 	};
-	const auto topPeer = _large ? _large->row()->peer().get() : nullptr;
+	const auto topPeer = _large ? _large->peer().get() : nullptr;
 	const auto reorderNeeded = [&] {
 		if (!topPeer) {
 			return false;
 		}
 		for (const auto &tile : _tiles) {
-			if (tile.get() != _large && tile->row()->peer() == topPeer) {
+			if (tile.get() != _large && tile->peer() == topPeer) {
 				return (tile.get() != _tiles.front().get())
 					&& !tile->trackOrUserpicSize().isEmpty();
 			}
@@ -813,7 +813,7 @@ void Viewport::updateTilesGeometryColumn(int outerWidth) {
 		ranges::stable_partition(
 			_tilesForOrder,
 			[&](not_null<VideoTile*> tile) {
-				return (tile->row()->peer() == topPeer);
+				return (tile->peer() == topPeer);
 			});
 		for (const auto &tile : _tilesForOrder) {
 			layoutNext(tile);

Telegram/SourceFiles/calls/group/calls_group_viewport_opengl.cpp

@@ -460,7 +460,7 @@ void Viewport::RendererGL::validateUserpicFrame(
 	}
 	const auto size = tile->trackOrUserpicSize();
 	tileData.userpicFrame = PeerData::GenerateUserpicImage(
-		tile->row()->peer(),
+		tile->peer(),
 		tile->row()->ensureUserpicView(),
 		size.width(),
 		0);
@@ -1239,7 +1239,7 @@ void Viewport::RendererGL::validateDatas() {
 			j->stale = false;
 			const auto index = (j - begin(_tileData));
 			_tileDataIndices[i] = index;
-			const auto peer = tiles[i]->row()->peer();
+			const auto peer = tiles[i]->peer();
 			if ((j->peer != peer)
 				|| (j->nameVersion != peer->nameVersion())
 				|| (j->nameRect.width() != width)) {
@@ -1263,7 +1263,7 @@ void Viewport::RendererGL::validateDatas() {
 			continue;
 		}
 		const auto id = quintptr(tiles[i]->track().get());
-		const auto peer = tiles[i]->row()->peer();
+		const auto peer = tiles[i]->peer();
 		const auto paused = (tiles[i]->track()->state()
 			== Webrtc::VideoState::Paused);
 		auto index = int(_tileData.size());

Telegram/SourceFiles/calls/group/calls_group_viewport_raster.cpp

@@ -82,7 +82,7 @@ void Viewport::RendererSW::validateUserpicFrame(
 	const auto size = tile->trackOrUserpicSize();
 	data.userpicFrame = Images::BlurLargeImage(
 		PeerData::GenerateUserpicImage(
-			tile->row()->peer(),
+			tile->peer(),
 			tile->row()->ensureUserpicView(),
 			size.width(),
 			0),

Telegram/SourceFiles/calls/group/calls_group_viewport_tile.cpp

@@ -7,6 +7,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "calls/group/calls_group_viewport_tile.h"
 
+#include "calls/group/calls_group_members_row.h"
 #include "webrtc/webrtc_video_track.h"
 #include "lang/lang_keys.h"
 #include "ui/round_rect.h"
@@ -33,11 +34,11 @@ Viewport::VideoTile::VideoTile(
 : _endpoint(endpoint)
 , _update(std::move(update))
 , _track(std::move(track))
+, _peer(_track.row->peer())
 , _trackSize(std::move(trackSize))
 , _rtmp(endpoint.rtmp())
 , _self(self) {
 	Expects(_track.track != nullptr);
-	Expects(_track.row != nullptr);
 
 	using namespace rpl::mappers;
 	_track.track->stateValue(

Telegram/SourceFiles/calls/group/calls_group_viewport_tile.h

@@ -37,6 +37,9 @@ public:
 	[[nodiscard]] not_null<MembersRow*> row() const {
 		return _track.row;
 	}
+	[[nodiscard]] not_null<PeerData*> peer() const {
+		return _peer;
+	}
 	[[nodiscard]] bool rtmp() const {
 		return _rtmp;
 	}
@@ -113,8 +116,9 @@ private:
 
 	const VideoEndpoint _endpoint;
 	const Fn<void()> _update;
+	const VideoTileTrack _track;
+	const not_null<PeerData*> _peer;
 
-	VideoTileTrack _track;
 	QRect _geometry;
 	TileAnimation _animation;
 	rpl::variable<QSize> _trackSize;