From 6d34a2e0074c5ce3e0da4743616ec5b3e96253fb Mon Sep 17 00:00:00 2001
From: Aris Merchant <22333129+inquisitivecrystal@users.noreply.github.com>
Date: Thu, 1 Jul 2021 15:07:09 -0700
Subject: [PATCH] Stabilize `Seek::rewind`

---
 library/std/src/io/mod.rs   | 3 +--
 library/std/src/io/tests.rs | 4 ++++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/library/std/src/io/mod.rs b/library/std/src/io/mod.rs
index 00b85604a3f67..594cef27b4138 100644
--- a/library/std/src/io/mod.rs
+++ b/library/std/src/io/mod.rs
@@ -1736,7 +1736,6 @@ pub trait Seek {
     /// # Example
     ///
     /// ```no_run
-    /// #![feature(seek_rewind)]
     /// use std::io::{Read, Seek, Write};
     /// use std::fs::OpenOptions;
     ///
@@ -1754,7 +1753,7 @@ pub trait Seek {
     /// f.read_to_string(&mut buf).unwrap();
     /// assert_eq!(&buf, hello);
     /// ```
-    #[unstable(feature = "seek_rewind", issue = "85149")]
+    #[stable(feature = "seek_rewind", since = "1.55.0")]
     fn rewind(&mut self) -> Result<()> {
         self.seek(SeekFrom::Start(0))?;
         Ok(())
diff --git a/library/std/src/io/tests.rs b/library/std/src/io/tests.rs
index b73bcf85fbee2..1beb72a9a5072 100644
--- a/library/std/src/io/tests.rs
+++ b/library/std/src/io/tests.rs
@@ -336,6 +336,10 @@ fn seek_position() -> io::Result<()> {
     assert_eq!(c.stream_position()?, 8);
     assert_eq!(c.stream_position()?, 8);
 
+    c.rewind()?;
+    assert_eq!(c.stream_position()?, 0);
+    assert_eq!(c.stream_position()?, 0);
+
     Ok(())
 }