Avoid a useless FxHashSet::insert in FileSearch::for_each_lib_search_path.

nnethercote · nnethercote · commit 0238bcc60d94 · 2018-12-12T10:36:15.000+11:00
diff --git 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 {

Original file line number	Diff line number	Diff line change
`@@ -53,8 +53,6 @@ impl<'a> FileSearch<'a> {`
`53`	`53`	`if !visited_dirs.contains(&tlib_path) {`
`54`	`54`	`f(&tlib_path, PathKind::All);`
`55`	`55`	`}`
`56`		`-`
`57`		`- visited_dirs.insert(tlib_path);`
`58`	`56`	`}`
`59`	`57`
`60`	`58`	`pub fn get_lib_path(&self) -> PathBuf {`