Fix several possible crashes.

Telegram/SourceFiles/boxes/peers/edit_peer_invite_link.cpp

@@ -522,9 +522,23 @@ not_null<Ui::SlideWrap<>*> Controller::addRequestedListBlock(
 			lt_count_decimal,
 			std::move(requestedCount)));
 
-	const auto delegate = container->lifetime().make_state<
-		PeerListContentDelegateSimple
-	>();
+	class Delegate final : public PeerListContentDelegateSimple {
+	public:
+		explicit Delegate(std::shared_ptr<Main::SessionShow> show)
+		: _show(std::move(show)) {
+		}
+
+		std::shared_ptr<Main::SessionShow> peerListUiShow() override {
+			return _show;
+		}
+
+	private:
+		const std::shared_ptr<Main::SessionShow> _show;
+
+	};
+	const auto delegate = container->lifetime().make_state<Delegate>(
+		this->delegate()->peerListUiShow());
+
 	const auto controller = container->lifetime().make_state<
 		Controller
 	>(_peer, _data.current().admin, _data.value(), Role::Requested);

Telegram/SourceFiles/boxes/share_box.cpp

@@ -936,16 +936,18 @@ void ShareBox::Inner::loadProfilePhotos() {
 		const auto from = std::max(yFrom / _rowHeight, 0);
 		const auto to = std::max((yTo / _rowHeight) + 1, from);
 
-		const auto ffrom = from;
 		const auto fto = std::min(to, int(_filtered.size()));
+		const auto ffrom = std::min(from, fto);
 		for (auto i = ffrom; i != fto; ++i) {
 			preloadUserpic(_filtered[i]->entry());
 		}
 
-		const auto ufrom = std::max(from - int(_filtered.size()), 0);
 		const auto uto = std::min(
 			to - int(_filtered.size()),
 			int(d_byUsernameFiltered.size()));
+		const auto ufrom = std::min(
+			std::max(from - int(_filtered.size()), 0),
+			uto);
 		for (auto i = ufrom; i != uto; ++i) {
 			preloadUserpic(d_byUsernameFiltered[i]->history);
 		}