1 files changed, 20 insertions, 0 deletions
diff --git a/library/core/src/str/error.rs b/library/core/src/str/error.rs
index 4e569fcc8..343889b69 100644
--- a/library/core/src/str/error.rs
+++ b/library/core/src/str/error.rs
@@ -1,5 +1,7 @@
 //! Defines utf8 error type.
 
+#[cfg(not(bootstrap))]
+use crate::error::Error;
 use crate::fmt;
 
 /// Errors which can occur when attempting to interpret a sequence of [`u8`]
@@ -122,6 +124,15 @@ impl fmt::Display for Utf8Error {
     }
 }
 
+#[cfg(not(bootstrap))]
+#[stable(feature = "rust1", since = "1.0.0")]
+impl Error for Utf8Error {
+    #[allow(deprecated)]
+    fn description(&self) -> &str {
+        "invalid utf-8: corrupt contents"
+    }
+}
+
 /// An error returned when parsing a `bool` using [`from_str`] fails
 ///
 /// [`from_str`]: super::FromStr::from_str
@@ -136,3 +147,12 @@ impl fmt::Display for ParseBoolError {
         "provided string was not `true` or `false`".fmt(f)
     }
 }
+
+#[cfg(not(bootstrap))]
+#[stable(feature = "rust1", since = "1.0.0")]
+impl Error for ParseBoolError {
+    #[allow(deprecated)]
+    fn description(&self) -> &str {
+        "failed to parse bool"
+    }
+}