1 files changed, 6 insertions, 0 deletions
diff --git a/library/std/src/sys_common/wtf8.rs b/library/std/src/sys_common/wtf8.rs
index 2dbd19d7171..38e15f9f549 100644
--- a/library/std/src/sys_common/wtf8.rs
+++ b/library/std/src/sys_common/wtf8.rs
@@ -468,6 +468,12 @@ impl Wtf8Buf {
         let bytes: Box<[u8]> = unsafe { mem::transmute(boxed) };
         Wtf8Buf { bytes: bytes.into_vec(), is_known_utf8: false }
     }
+
+    /// Part of a hack to make PathBuf::push/pop more efficient.
+    #[inline]
+    pub(crate) fn as_mut_vec_for_path_buf(&mut self) -> &mut Vec<u8> {
+        &mut self.bytes
+    }
 }
 
 /// Creates a new WTF-8 string from an iterator of code points.