--- Revision None
+++ Revision 646664313236
@@ -0,0 +1,25 @@
+diff --git a/src/couchdb/couch_replicator.erl b/src/couchdb/couch_replicator.erl
+index 315cec4..663ce27 100644
+--- a/src/couchdb/couch_replicator.erl
++++ b/src/couchdb/couch_replicator.erl
+@@ -597,8 +597,18 @@ spawn_changes_reader(StartSeq, Db, ChangesQueue, Options) ->
+ read_changes(StartSeq, Db, ChangesQueue, Options) ->
+     try
+         couch_api_wrap:changes_since(Db, all_docs, StartSeq,
+-            fun(#doc_info{high_seq = Seq} = DocInfo) ->
+-                ok = couch_work_queue:queue(ChangesQueue, DocInfo),
++            fun(#doc_info{high_seq = Seq, id = Id} = DocInfo) ->
++                case Id of
++                <<>> ->
++                    % Previous CouchDB releases had a bug which allowed a doc
++                    % with an empty ID to be inserted into databases. Such doc
++                    % is impossible to GET.
++                    ?LOG_ERROR("Replicator: ignoring document with empty ID in "
++                        "source database `~s` (_changes sequence ~p)",
++                        [couch_api_wrap:db_uri(Db), Seq]);
++                _ ->
++                    ok = couch_work_queue:queue(ChangesQueue, DocInfo)
++                end,
+                 put(last_seq, Seq)
+             end, Options),
+         couch_work_queue:close(ChangesQueue)