1 files changed, 1 insertions, 1 deletions

diff --git a/crates/ra_ide_api/src/symbol_index.rs b/crates/ra_ide_api/src/symbol_index.rs
index 2ca0a25d4..f4a0c6ac7 100644
--- a/crates/ra_ide_api/src/symbol_index.rs
+++ b/crates/ra_ide_api/src/symbol_index.rs
@@ -87,7 +87,7 @@ pub(crate) fn world_symbols(db: &RootDatabase, query: Query) -> Vec<FileSymbol>
         let mut files = Vec::new();
         for &root in db.local_roots().iter() {
             let sr = db.source_root(root);
-            files.extend(sr.files.values().map(|&it| it))
+            files.extend(sr.files.values().copied())
         }
 
         let snap = Snap(db.snapshot());