3 files changed, 13 insertions, 12 deletions
diff --git a/vendor/crossbeam-utils/src/atomic/atomic_cell.rs b/vendor/crossbeam-utils/src/atomic/atomic_cell.rs
index 9fed45d4c..7941c5c87 100644
--- a/vendor/crossbeam-utils/src/atomic/atomic_cell.rs
+++ b/vendor/crossbeam-utils/src/atomic/atomic_cell.rs
@@ -180,7 +180,7 @@ impl<T> AtomicCell<T> {
     /// ```
     #[inline]
     pub fn as_ptr(&self) -> *mut T {
-        self.value.get() as *mut T
+        self.value.get().cast::<T>()
     }
 }
 
@@ -902,12 +902,7 @@ fn lock(addr: usize) -> &'static SeqLock {
     const LEN: usize = 97;
     #[allow(clippy::declare_interior_mutable_const)]
     const L: SeqLock = SeqLock::new();
-    static LOCKS: [SeqLock; LEN] = [
-        L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L,
-        L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L,
-        L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L, L,
-        L, L, L, L, L, L, L,
-    ];
+    static LOCKS: [SeqLock; LEN] = [L; LEN];
 
     // If the modulus is a constant number, the compiler will use crazy math to transform this into
     // a sequence of cheap arithmetic operations rather than using the slow modulo instruction.
@@ -973,7 +968,7 @@ macro_rules! atomic {
 
 /// Returns `true` if operations on `AtomicCell<T>` are lock-free.
 const fn atomic_is_lock_free<T>() -> bool {
-    // HACK(taiki-e): This is equivalent to `atomic! { T, _a, true, false }`, but can be used in const fn even in Rust 1.36.
+    // HACK(taiki-e): This is equivalent to `atomic! { T, _a, true, false }`, but can be used in const fn even in our MSRV (Rust 1.38).
     let is_lock_free = can_transmute::<T, AtomicUnit>()
         | can_transmute::<T, atomic::AtomicU8>()
         | can_transmute::<T, atomic::AtomicU16>()
@@ -1009,10 +1004,11 @@ where
                 // discard the data when a data race is detected. The proper solution would be to
                 // do atomic reads and atomic writes, but we can't atomically read and write all
                 // kinds of data since `AtomicU8` is not available on stable Rust yet.
-                let val = ptr::read_volatile(src);
+                // Load as `MaybeUninit` because we may load a value that is not valid as `T`.
+                let val = ptr::read_volatile(src.cast::<MaybeUninit<T>>());
 
                 if lock.validate_read(stamp) {
-                    return val;
+                    return val.assume_init();
                 }
             }
 
@@ -1072,6 +1068,7 @@ unsafe fn atomic_swap<T>(dst: *mut T, val: T) -> T {
 ///
 /// This operation uses the `AcqRel` ordering. If possible, an atomic instructions is used, and a
 /// global lock otherwise.
+#[allow(clippy::let_unit_value)]
 unsafe fn atomic_compare_exchange_weak<T>(dst: *mut T, mut current: T, new: T) -> Result<T, T>
 where
     T: Copy + Eq,
diff --git a/vendor/crossbeam-utils/src/backoff.rs b/vendor/crossbeam-utils/src/backoff.rs
index 1012f06b2..9e256aaf2 100644
--- a/vendor/crossbeam-utils/src/backoff.rs
+++ b/vendor/crossbeam-utils/src/backoff.rs
@@ -201,6 +201,7 @@ impl Backoff {
     /// assert_eq!(ready.load(SeqCst), false);
     /// spin_wait(&ready);
     /// assert_eq!(ready.load(SeqCst), true);
+    /// # std::thread::sleep(std::time::Duration::from_millis(500)); // wait for background threads closed: https://github.com/rust-lang/miri/issues/1371
     /// ```
     ///
     /// [`AtomicBool`]: std::sync::atomic::AtomicBool
@@ -269,6 +270,7 @@ impl Backoff {
     /// assert_eq!(ready.load(SeqCst), false);
     /// blocking_wait(&ready);
     /// assert_eq!(ready.load(SeqCst), true);
+    /// # std::thread::sleep(std::time::Duration::from_millis(500)); // wait for background threads closed: https://github.com/rust-lang/miri/issues/1371
     /// ```
     ///
     /// [`AtomicBool`]: std::sync::atomic::AtomicBool
diff --git a/vendor/crossbeam-utils/src/sync/parker.rs b/vendor/crossbeam-utils/src/sync/parker.rs
index 531f5a5fc..e791c4485 100644
--- a/vendor/crossbeam-utils/src/sync/parker.rs
+++ b/vendor/crossbeam-utils/src/sync/parker.rs
@@ -44,6 +44,7 @@ use std::time::{Duration, Instant};
 ///
 /// // Wakes up when `u.unpark()` provides the token.
 /// p.park();
+/// # std::thread::sleep(std::time::Duration::from_millis(500)); // wait for background threads closed: https://github.com/rust-lang/miri/issues/1371
 /// ```
 ///
 /// [`park`]: Parker::park
@@ -241,6 +242,7 @@ impl Unparker {
     ///
     /// // Wakes up when `u.unpark()` provides the token.
     /// p.park();
+    /// # std::thread::sleep(std::time::Duration::from_millis(500)); // wait for background threads closed: https://github.com/rust-lang/miri/issues/1371
     /// ```
     ///
     /// [`park`]: Parker::park
@@ -262,7 +264,7 @@ impl Unparker {
     /// # let _ = unsafe { Unparker::from_raw(raw) };
     /// ```
     pub fn into_raw(this: Unparker) -> *const () {
-        Arc::into_raw(this.inner) as *const ()
+        Arc::into_raw(this.inner).cast::<()>()
     }
 
     /// Converts a raw pointer into an `Unparker`.
@@ -284,7 +286,7 @@ impl Unparker {
     /// ```
     pub unsafe fn from_raw(ptr: *const ()) -> Unparker {
         Unparker {
-            inner: Arc::from_raw(ptr as *const Inner),
+            inner: Arc::from_raw(ptr.cast::<Inner>()),
         }
     }
 }