1 files changed, 8 insertions, 1 deletions
diff --git a/src/libstd/error.rs b/src/libstd/error.rs
index ec1c444bcf8..d4c4cb9c3b9 100644
--- a/src/libstd/error.rs
+++ b/src/libstd/error.rs
@@ -465,7 +465,7 @@ impl<'a> From<Cow<'a, str>> for Box<dyn Error> {
     }
 }
 
-#[stable(feature = "never_type", since = "1.41.0")]
+#[unstable(feature = "never_type", issue = "35121")]
 impl Error for ! {
     fn description(&self) -> &str { *self }
 }
@@ -551,6 +551,13 @@ impl Error for string::FromUtf16Error {
     }
 }
 
+#[stable(feature = "str_parse_error2", since = "1.8.0")]
+impl Error for string::ParseError {
+    fn description(&self) -> &str {
+        match *self {}
+    }
+}
+
 #[stable(feature = "decode_utf16", since = "1.9.0")]
 impl Error for char::DecodeUtf16Error {
     fn description(&self) -> &str {