Pleasing clippy

src/indexer/index_writer.rs

@@ -553,7 +553,7 @@ impl IndexWriter {
         // marks the segment updater as killed. From now on, all
         // segment updates will be ignored.
         self.segment_updater.kill();
-        let document_receiver = self.operation_receiver();
+        let document_receiver_res = self.operation_receiver();
 
         // take the directory lock to create a new index_writer.
         let directory_lock = self
@@ -579,7 +579,9 @@ impl IndexWriter {
         //
         // This will reach an end as the only document_sender
         // was dropped with the index_writer.
-        for _ in document_receiver {}
+        if let Ok(document_receiver) = document_receiver_res {
+            for _ in document_receiver {}
+        }
 
         Ok(self.committed_opstamp)
     }

src/indexer/index_writer_status.rs

@@ -22,7 +22,7 @@ impl IndexWriterStatus {
             .receive_channel
             .read()
             .expect("This lock should never be poisoned");
-        rlock.as_ref().map(|receiver| receiver.clone())
+        rlock.as_ref().cloned()
     }
 
     /// Create an index writer bomb.

src/store/index/skip_index.rs

@@ -19,9 +19,7 @@ impl<'a> Iterator for LayerCursor<'a> {
                 return None;
             }
             let (block_mut, remaining_mut) = (&mut self.block, &mut self.remaining);
-            if block_mut.deserialize(remaining_mut).is_err() {
-                return None;
-            }
+            block_mut.deserialize(remaining_mut).ok()?;
             self.cursor = 0;
         }
         let res = Some(self.block.get(self.cursor));