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-rw-r--r--src/liballoc/string.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/liballoc/string.rs b/src/liballoc/string.rs
index 43217ae9364..452abe31742 100644
--- a/src/liballoc/string.rs
+++ b/src/liballoc/string.rs
@@ -2225,7 +2225,7 @@ impl From<&str> for String {
     }
 }
 
-#[stable(feature = "???", since = "1.43.0")]
+#[stable(feature = "from_mut_str_for_string", since = "1.44.0")]
 impl From<&mut str> for String {
     #[inline]
     fn from(s: &mut str) -> String {