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-rw-r--r--library/std/src/error.rs3
-rw-r--r--library/std/src/thread/mod.rs3
2 files changed, 4 insertions, 2 deletions
diff --git a/library/std/src/error.rs b/library/std/src/error.rs
index 6ae0bc47a94..ea0c230fa42 100644
--- a/library/std/src/error.rs
+++ b/library/std/src/error.rs
@@ -478,6 +478,9 @@ impl Error for char::DecodeUtf16Error {
     }
 }
 
+#[stable(feature = "u8_from_char", since = "1.59.0")]
+impl Error for char::TryFromCharError {}
+
 #[unstable(feature = "map_try_insert", issue = "82766")]
 impl<'a, K: Debug + Ord, V: Debug> Error
     for crate::collections::btree_map::OccupiedError<'a, K, V>
diff --git a/library/std/src/thread/mod.rs b/library/std/src/thread/mod.rs
index 9f7f10d0d00..ae4b65871ec 100644
--- a/library/std/src/thread/mod.rs
+++ b/library/std/src/thread/mod.rs
@@ -1504,7 +1504,6 @@ fn _assert_sync_and_send() {
 ///
 /// ```
 /// # #![allow(dead_code)]
-/// #![feature(available_parallelism)]
 /// use std::{io, thread};
 ///
 /// fn main() -> io::Result<()> {
@@ -1516,7 +1515,7 @@ fn _assert_sync_and_send() {
 #[doc(alias = "available_concurrency")] // Alias for a previous name we gave this API on unstable.
 #[doc(alias = "hardware_concurrency")] // Alias for C++ `std::thread::hardware_concurrency`.
 #[doc(alias = "num_cpus")] // Alias for a popular ecosystem crate which provides similar functionality.
-#[unstable(feature = "available_parallelism", issue = "74479")]
+#[stable(feature = "available_parallelism", since = "1.59.0")]
 pub fn available_parallelism() -> io::Result<NonZeroUsize> {
     imp::available_parallelism()
 }