Fix crash on invalid image data.

Telegram/SourceFiles/app.cpp

@@ -320,6 +320,9 @@ namespace App {
 	}
 
 	QImage readImage(QByteArray data, QByteArray *format, bool opaque, bool *animated) {
+		if (data.isEmpty()) {
+			return QImage();
+		}
 		QByteArray tmpFormat;
 		QImage result;
 		QBuffer buffer(&data);

Telegram/SourceFiles/data/data_document.h

@@ -177,6 +177,9 @@ public:
 	[[nodiscard]] QByteArray inlineThumbnailBytes() const {
 		return _inlineThumbnailBytes;
 	}
+	void clearInlineThumbnailBytes() {
+		_inlineThumbnailBytes = QByteArray();
+	}
 
 	[[nodiscard]] Storage::Cache::Key goodThumbnailCacheKey() const;
 	[[nodiscard]] bool goodThumbnailChecked() const;

Telegram/SourceFiles/data/data_document_media.cpp

@@ -171,9 +171,14 @@ void DocumentMedia::setGoodThumbnail(QImage thumbnail) {
 
 Image *DocumentMedia::thumbnailInline() const {
 	if (!_inlineThumbnail) {
-		auto image = Images::FromInlineBytes(_owner->inlineThumbnailBytes());
-		if (!image.isNull()) {
-			_inlineThumbnail = std::make_unique<Image>(std::move(image));
+		const auto bytes = _owner->inlineThumbnailBytes();
+		if (!bytes.isEmpty()) {
+			auto image = Images::FromInlineBytes(bytes);
+			if (image.isNull()) {
+				_owner->clearInlineThumbnailBytes();
+			} else {
+				_inlineThumbnail = std::make_unique<Image>(std::move(image));
+			}
 		}
 	}
 	return _inlineThumbnail.get();
@@ -360,10 +365,11 @@ Image *DocumentMedia::getStickerSmall() {
 }
 
 void DocumentMedia::checkStickerLarge(not_null<FileLoader*> loader) {
-	if (_owner->sticker()
-		&& !_sticker
-		&& !loader->imageData().isNull()) {
-		_sticker = std::make_unique<Image>(loader->imageData());
+	if (_sticker || !_owner->sticker()) {
+		return;
+	}
+	if (auto image = loader->imageData(); !image.isNull()) {
+		_sticker = std::make_unique<Image>(std::move(image));
 	}
 }
 

Telegram/SourceFiles/data/data_photo.h

@@ -88,6 +88,9 @@ public:
 	[[nodiscard]] QByteArray inlineThumbnailBytes() const {
 		return _inlineThumbnailBytes;
 	}
+	void clearInlineThumbnailBytes() {
+		_inlineThumbnailBytes = QByteArray();
+	}
 
 	void load(
 		Data::FileOrigin origin,

Telegram/SourceFiles/data/data_photo_media.cpp

@@ -34,9 +34,14 @@ not_null<PhotoData*> PhotoMedia::owner() const {
 
 Image *PhotoMedia::thumbnailInline() const {
 	if (!_inlineThumbnail) {
-		auto image = Images::FromInlineBytes(_owner->inlineThumbnailBytes());
-		if (!image.isNull()) {
-			_inlineThumbnail = std::make_unique<Image>(std::move(image));
+		const auto bytes = _owner->inlineThumbnailBytes();
+		if (!bytes.isEmpty()) {
+			auto image = Images::FromInlineBytes(bytes);
+			if (image.isNull()) {
+				_owner->clearInlineThumbnailBytes();
+			} else {
+				_inlineThumbnail = std::make_unique<Image>(std::move(image));
+			}
 		}
 	}
 	return _inlineThumbnail.get();

Telegram/SourceFiles/ui/image/image.cpp

@@ -112,7 +112,9 @@ Image::Image(const QString &path) : Image(ReadContent(path)) {
 Image::Image(const QByteArray &content) : Image(ReadImage(content)) {
 }
 
-Image::Image(QImage &&data) : _data(std::move(data)) {
+Image::Image(QImage &&data)
+: _data(data.isNull() ? Empty()->original() : std::move(data)) {
+	Expects(!_data.isNull());
 }
 
 not_null<Image*> Image::Empty() {