diff --git a/rust-version b/rust-version
index 2c98082bc1..eca1a2335c 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-b17491c8f6d555386104dfd82004c01bfef09c95
+d26b41711282042c4ea0c5733e7332b07cfa4933
diff --git a/tests/fail/unaligned_pointers/unaligned_ref_addr_of.rs b/tests/fail/unaligned_pointers/unaligned_ref_addr_of.rs
index 470420acd5..225feef728 100644
--- a/tests/fail/unaligned_pointers/unaligned_ref_addr_of.rs
+++ b/tests/fail/unaligned_pointers/unaligned_ref_addr_of.rs
@@ -1,6 +1,8 @@
 // This should fail even without Stacked Borrows.
 //@compile-flags: -Zmiri-disable-stacked-borrows -Cdebug-assertions=no
 
+#![allow(invalid_reference_casting)] // for u16 -> u32
+
 fn main() {
     // Try many times as this might work by chance.
     for _ in 0..20 {
diff --git a/tests/pass/async-closure.rs b/tests/pass/async-closure.rs
new file mode 100644
index 0000000000..e04acfc39c
--- /dev/null
+++ b/tests/pass/async-closure.rs
@@ -0,0 +1,41 @@
+#![feature(async_closure, noop_waker, async_fn_traits)]
+
+use std::future::Future;
+use std::pin::pin;
+use std::task::*;
+
+pub fn block_on<T>(fut: impl Future<Output = T>) -> T {
+    let mut fut = pin!(fut);
+    let ctx = &mut Context::from_waker(Waker::noop());
+
+    loop {
+        match fut.as_mut().poll(ctx) {
+            Poll::Pending => {}
+            Poll::Ready(t) => break t,
+        }
+    }
+}
+
+#[rustfmt::skip]
+async fn call_once(f: impl async FnOnce(DropMe)) {
+    f(DropMe("world")).await;
+}
+
+#[derive(Debug)]
+struct DropMe(&'static str);
+
+impl Drop for DropMe {
+    fn drop(&mut self) {
+        println!("{}", self.0);
+    }
+}
+
+pub fn main() {
+    block_on(async {
+        let b = DropMe("hello");
+        let async_closure = async move |a: DropMe| {
+            println!("{a:?} {b:?}");
+        };
+        call_once(async_closure).await;
+    });
+}
diff --git a/tests/pass/async-closure.stdout b/tests/pass/async-closure.stdout
new file mode 100644
index 0000000000..34cfdedc44
--- /dev/null
+++ b/tests/pass/async-closure.stdout
@@ -0,0 +1,3 @@
+DropMe("world") DropMe("hello")
+world
+hello