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-rw-r--r--library/core/src/str/mod.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/library/core/src/str/mod.rs b/library/core/src/str/mod.rs
index f1db385e212..04fdaa8143e 100644
--- a/library/core/src/str/mod.rs
+++ b/library/core/src/str/mod.rs
@@ -3078,7 +3078,8 @@ impl str {
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
-impl AsRef<[u8]> for str {
+#[rustc_const_unstable(feature = "const_convert", issue = "143773")]
+impl const AsRef<[u8]> for str {
     #[inline]
     fn as_ref(&self) -> &[u8] {
         self.as_bytes()