fix: check for pendingUrls desync

src/proxy/tinymitm/proxy.cpp

@@ -481,7 +481,20 @@ void TinyMITMProxy::handleClient(SOCKET clientSocket)
 
                         if (complete)
                         {
-                            std::string url = pendingUrls.back();
+                            if (pendingUrls.empty())
+                            {
+                                TINYMITM_WRITELOG(error,
+                                                  "Pending URLs empty but request complete for {}. This shouldn't "
+                                                  "happen, resetting stream. Buffer size: {}",
+                                                  host, clientStream.buffer.size());
+
+                                clientStream.buffer.erase(0, totalRequestSize);
+                                clientStream.reset();
+                                break;
+                            }
+
+                            std::string url = pendingUrls.front();
+                            pendingUrls.pop_front();
                             std::string headers = clientStream.buffer.substr(0, clientStream.headersEnd + 4);
 
                             removeHeader(headers, "Accept-Encoding");