fix a few shadowing variable warnings under Apple clang 16.0.0

src/rtc_signaling.cpp

@@ -287,7 +287,7 @@ rtc_signaling::connection& rtc_signaling::create_connection(rtc_offer_id const&
 	});
 
 	pc->onGatheringStateChange([weak_this = weak_from_this(), weak_pc = make_weak_ptr(pc), offer_id
-			, handler = std::move(handler)]
+			, handler_ = std::move(handler)]
 		(rtc::PeerConnection::GatheringState state)
 	{
 		// Warning: this is called from another thread
@@ -299,7 +299,7 @@ rtc_signaling::connection& rtc_signaling::create_connection(rtc_offer_id const&
 		{
 			auto& io_context = self->m_io_context;
 			auto description = *pc_->localDescription();
-			post(io_context, std::bind(std::move(handler), error_code{}, description));
+			post(io_context, std::bind(std::move(handler_), error_code{}, description));
 		}
 	});
 

src/tracker_manager.cpp

@@ -309,26 +309,26 @@ namespace libtorrent::aux {
 			{
 				// when we're shutting down, we don't really want to
 				// re-establish the persistent websocket connection just to
-				// announce "stopped", and advertize 0 offers. It may hang
+				// announce "stopped", and advertise 0 offers. It may hang
 				// shutdown.
 				post(ios, std::bind(&request_callback::tracker_request_error, cb, std::move(req)
 					, errors::torrent_aborted, operation_t::connect
 					, "", seconds32(0)));
 			}
 			cb->generate_rtc_offers(req.num_want
-				, [this, &ios, req = std::move(req), c](error_code const& ec
+				, [this, &ios, request = std::move(req), c](error_code const& ec
 					, std::vector<aux::rtc_offer> offers) mutable
 			{
-				if (!ec) req.offers = std::move(offers);
+				if (!ec) request.offers = std::move(offers);
 
-				auto it = m_websocket_conns.find(req.url);
+				auto it = m_websocket_conns.find(request.url);
 				if (it != m_websocket_conns.end() && it->second->is_started()) {
-					it->second->queue_request(std::move(req), c);
+					it->second->queue_request(std::move(request), c);
 				} else {
 					auto con = std::make_shared<aux::websocket_tracker_connection>(
-							ios, *this, std::move(req), c);
+							ios, *this, std::move(request), c);
 					con->start();
-					m_websocket_conns[req.url] = con;
+					m_websocket_conns[request.url] = con;
 				}
 			});
 			return;

src/websocket_tracker_connection.cpp

@@ -155,13 +155,13 @@ void websocket_tracker_connection::send_pending()
 	auto [msg, callback] = std::move(m_pending.front());
 	m_pending.pop();
 
-	std::visit([this, callback = callback](auto const& m)
+	std::visit([this, cb = callback](auto const& m)
 		{
 			// Update requester and store callback
-			if (callback.lock())
+			if (cb.lock())
 			{
-				m_requester = callback;
-				m_callbacks[m.info_hash] = std::move(callback);
+				m_requester = cb;
+				m_callbacks[m.info_hash] = std::move(cb);
 			}
 
 			do_send(m);