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-rw-r--r--library/core/src/lib.rs1
-rw-r--r--library/core/src/str/converts.rs1
-rw-r--r--library/core/src/str/mod.rs6
3 files changed, 5 insertions, 3 deletions
diff --git a/library/core/src/lib.rs b/library/core/src/lib.rs
index 9edc1a8c1f5..ba30c4eab11 100644
--- a/library/core/src/lib.rs
+++ b/library/core/src/lib.rs
@@ -151,7 +151,6 @@
 #![feature(const_slice_from_raw_parts_mut)]
 #![feature(const_slice_from_ref)]
 #![feature(const_slice_split_at_mut)]
-#![feature(const_str_as_mut)]
 #![feature(const_strict_overflow_ops)]
 #![feature(const_swap)]
 #![feature(const_try)]
diff --git a/library/core/src/str/converts.rs b/library/core/src/str/converts.rs
index e932b652e2d..194db56fdaf 100644
--- a/library/core/src/str/converts.rs
+++ b/library/core/src/str/converts.rs
@@ -195,6 +195,7 @@ pub const unsafe fn from_utf8_unchecked(v: &[u8]) -> &str {
 #[inline]
 #[must_use]
 #[stable(feature = "str_mut_extras", since = "1.20.0")]
+#[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_mut_refs))]
 #[rustc_const_stable(
     feature = "const_str_from_utf8_unchecked_mut",
     since = "CURRENT_RUSTC_VERSION"
diff --git a/library/core/src/str/mod.rs b/library/core/src/str/mod.rs
index 3d535214637..e93c52f2799 100644
--- a/library/core/src/str/mod.rs
+++ b/library/core/src/str/mod.rs
@@ -339,7 +339,8 @@ impl str {
     /// assert_eq!("🍔∈🌏", s);
     /// ```
     #[stable(feature = "str_mut_extras", since = "1.20.0")]
-    #[rustc_const_unstable(feature = "const_str_as_mut", issue = "130086")]
+    #[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_mut_refs))]
+    #[rustc_const_stable(feature = "const_str_as_mut", since = "CURRENT_RUSTC_VERSION")]
     #[must_use]
     #[inline(always)]
     pub const unsafe fn as_bytes_mut(&mut self) -> &mut [u8] {
@@ -385,7 +386,8 @@ impl str {
     /// It is your responsibility to make sure that the string slice only gets
     /// modified in a way that it remains valid UTF-8.
     #[stable(feature = "str_as_mut_ptr", since = "1.36.0")]
-    #[rustc_const_unstable(feature = "const_str_as_mut", issue = "130086")]
+    #[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_mut_refs))]
+    #[rustc_const_stable(feature = "const_str_as_mut", since = "CURRENT_RUSTC_VERSION")]
     #[rustc_never_returns_null_ptr]
     #[must_use]
     #[inline(always)]