add tracking issue

diff --git a/src/libcore/str/mod.rs b/src/libcore/str/mod.rs
index 8c8f280f8479407e46ff5feb7392f58b9d168e8b..f95cd0dab43ab5e356a665f4dd266f9b882ee0b8 100644 (file)
--- a/src/libcore/str/mod.rs
+++ b/src/libcore/str/mod.rs
@@ -2223,7 +2223,7 @@ pub const fn as_ptr(&self) -> *const u8 {
     /// modified in a way that it remains valid UTF-8.
     ///
     /// [`u8`]: primitive.u8.html
-    #[unstable(feature = "str_as_mut_ptr", issue = "0")]
+    #[unstable(feature = "str_as_mut_ptr", issue = "58215")]
     #[inline]
     pub fn as_mut_ptr(&mut self) -> *mut u8 {
         self as *mut str as *mut u8