1 files changed, 9 insertions, 4 deletions
diff --git a/library/std/src/sys/unix/os_str.rs b/library/std/src/sys/unix/os_str.rs
index 488217f39..f7333fd5a 100644
--- a/library/std/src/sys/unix/os_str.rs
+++ b/library/std/src/sys/unix/os_str.rs
@@ -193,17 +193,22 @@ impl Buf {
 
 impl Slice {
     #[inline]
-    fn from_u8_slice(s: &[u8]) -> &Slice {
+    pub fn as_os_str_bytes(&self) -> &[u8] {
+        &self.inner
+    }
+
+    #[inline]
+    pub unsafe fn from_os_str_bytes_unchecked(s: &[u8]) -> &Slice {
         unsafe { mem::transmute(s) }
     }
 
     #[inline]
     pub fn from_str(s: &str) -> &Slice {
-        Slice::from_u8_slice(s.as_bytes())
+        unsafe { Slice::from_os_str_bytes_unchecked(s.as_bytes()) }
     }
 
-    pub fn to_str(&self) -> Option<&str> {
-        str::from_utf8(&self.inner).ok()
+    pub fn to_str(&self) -> Result<&str, crate::str::Utf8Error> {
+        str::from_utf8(&self.inner)
     }
 
     pub fn to_string_lossy(&self) -> Cow<'_, str> {