--- a/src/db_impl.rs	Fri Oct 06 06:13:20 2017 +0000
+++ b/src/db_impl.rs	Fri Oct 06 06:14:28 2017 +0000
@@ -698,6 +698,9 @@
                 // Parsing failed.
                 log!(self.opt.log, "Encountered seq=0 in key: {:?}", &key);
                 last_seq_for_key = MAX_SEQUENCE_NUMBER;
+                have_ukey = false;
+                current_ukey.clear();
+                input.advance();
                 continue;
             }
 
@@ -711,10 +714,16 @@
 
             // We can omit the key under the following conditions:
             if last_seq_for_key <= cs.smallest_seq {
+                last_seq_for_key = seq;
+                input.advance();
                 continue;
             }
+            // Entry is deletion; no older version is observable by any snapshot; and all entries
+            // in compacted levels with smaller sequence numbers will
             if ktyp == ValueType::TypeDeletion && seq <= cs.smallest_seq &&
                cs.compaction.is_base_level_for(ukey) {
+                last_seq_for_key = seq;
+                input.advance();
                 continue;
             }