# Fix crash when trying to call d.get_bitfield on a closed download. Ticket #1825 from libtorrent.rakshasa.no.
Index: rtorrent/src/command_download.cc
===================================================================
--- rtorrent/src/command_download.cc	(revision 1093)
+++ rtorrent/src/command_download.cc	(working copy)
@@ -292,6 +292,9 @@
 
 torrent::Object
 retrieve_d_bitfield(core::Download* download) {
+  if (!download->download()->file_list()->is_open())
+    throw torrent::input_error("Cannot retrieve bitfield of closed download.");
+
   const torrent::Bitfield* bitField = download->download()->file_list()->bitfield();
 
   return torrent::Object(rak::transform_hex(bitField->begin(), bitField->end()));