3 files changed, 13 insertions, 1 deletions
diff --git a/library/std/src/sys/unsupported/io.rs b/library/std/src/sys/unsupported/io.rs
index 82610ffab..6372fca74 100644
--- a/library/std/src/sys/unsupported/io.rs
+++ b/library/std/src/sys/unsupported/io.rs
@@ -30,7 +30,7 @@ impl<'a> IoSliceMut<'a> {
 
     #[inline]
     pub fn advance(&mut self, n: usize) {
-        let slice = mem::replace(&mut self.0, &mut []);
+        let slice = mem::take(&mut self.0);
         let (_, remaining) = slice.split_at_mut(n);
         self.0 = remaining;
     }
diff --git a/library/std/src/sys/unsupported/mod.rs b/library/std/src/sys/unsupported/mod.rs
index 15b22c620..e1a38de64 100644
--- a/library/std/src/sys/unsupported/mod.rs
+++ b/library/std/src/sys/unsupported/mod.rs
@@ -22,6 +22,7 @@ pub mod thread;
 #[cfg(target_thread_local)]
 pub mod thread_local_dtor;
 pub mod thread_local_key;
+pub mod thread_parking;
 pub mod time;
 
 mod common;
diff --git a/library/std/src/sys/unsupported/thread_parking.rs b/library/std/src/sys/unsupported/thread_parking.rs
new file mode 100644
index 000000000..197078bb1
--- /dev/null
+++ b/library/std/src/sys/unsupported/thread_parking.rs
@@ -0,0 +1,11 @@
+use crate::pin::Pin;
+use crate::time::Duration;
+
+pub struct Parker {}
+
+impl Parker {
+    pub unsafe fn new_in_place(_parker: *mut Parker) {}
+    pub unsafe fn park(self: Pin<&Self>) {}
+    pub unsafe fn park_timeout(self: Pin<&Self>, _dur: Duration) {}
+    pub fn unpark(self: Pin<&Self>) {}
+}