From 0238bcc60d943878244ef7221d338f13a35e2a45 Mon Sep 17 00:00:00 2001
From: Nicholas Nethercote <nnethercote@mozilla.com>
Date: Wed, 21 Nov 2018 22:03:59 +1100
Subject: [PATCH] Avoid a useless `FxHashSet::insert` in
 `FileSearch::for_each_lib_search_path`.

---
 src/librustc/session/filesearch.rs | 2 --
 1 file changed, 2 deletions(-)

diff --git a/src/librustc/session/filesearch.rs b/src/librustc/session/filesearch.rs
index 8159c65a8bc2d..f5dfde7d5189d 100644
--- a/src/librustc/session/filesearch.rs
+++ b/src/librustc/session/filesearch.rs
@@ -53,8 +53,6 @@ impl<'a> FileSearch<'a> {
         if !visited_dirs.contains(&tlib_path) {
             f(&tlib_path, PathKind::All);
         }
-
-        visited_dirs.insert(tlib_path);
     }
 
     pub fn get_lib_path(&self) -> PathBuf {