diff -ru a/src/ui.rs b/src/ui.rs
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -385,7 +386,7 @@
                     files_list
                         .iter()
                         .map(|f| misc::escape_filename(f))
-                        .collect::<Box<_>>()
+                        .collect::<Box<[_]>>()
                         .join(" ")
                 ));
             } else {