Override clone_from method for PathBuf and OsString

library/std/src/sys_common/os_str_bytes.rs

@@ -14,7 +14,7 @@ use crate::sys_common::{AsInner, FromInner, IntoInner};
 
 use core::str::lossy::Utf8Lossy;
 
-#[derive(Clone, Hash)]
+#[derive(Hash)]
 pub(crate) struct Buf {
     pub inner: Vec<u8>,
 }
@@ -53,6 +53,18 @@ impl fmt::Display for Buf {
     }
 }
 
+impl Clone for Buf {
+    #[inline]
+    fn clone(&self) -> Self {
+        Buf { inner: self.inner.clone() }
+    }
+
+    #[inline]
+    fn clone_from(&mut self, source: &Self) {
+        self.inner.clone_from(&source.inner)
+    }
+}
+
 impl IntoInner<Vec<u8>> for Buf {
     fn into_inner(self) -> Vec<u8> {
         self.inner