Pass by value

src/librustdoc/docfs.rs

@@ -36,8 +36,8 @@ pub struct DocFS {
 }
 
 impl DocFS {
-    pub fn new(errors: &Sender<String>) -> DocFS {
-        DocFS { sync_only: false, errors: Some(errors.clone()) }
+    pub fn new(errors: Sender<String>) -> DocFS {
+        DocFS { sync_only: false, errors: Some(errors) }
     }
 
     pub fn set_sync_only(&mut self, sync_only: bool) {

src/librustdoc/html/render/mod.rs

@@ -462,7 +462,7 @@ impl FormatRenderer for Context {
             style_files,
             resource_suffix,
             static_root_path,
-            fs: DocFS::new(&sender),
+            fs: DocFS::new(sender),
             edition,
             codes: ErrorCodes::from(UnstableFeatures::from_environment().is_nightly_build()),
             playground,