Rollup of 2 pull requests

library/core/src/task/wake.rs

@@ -90,6 +90,8 @@ impl RawWaker {
 /// pointers to *different* functions can compare equal (since identical functions can be
 /// deduplicated within a codegen unit).
 ///
+/// This struct is guaranteed to be aligned to at least 8 bytes.
+///
 /// # Thread safety
 /// If the [`RawWaker`] will be used to construct a [`Waker`] then
 /// these functions must all be thread-safe (even though [`RawWaker`] is
@@ -106,6 +108,8 @@ impl RawWaker {
 #[stable(feature = "futures_api", since = "1.36.0")]
 #[allow(unpredictable_function_pointer_comparisons)]
 #[derive(PartialEq, Copy, Clone, Debug)]
+// For bit-stuffing pointers we guarantee align >= 8.
+#[repr(align(8))]
 pub struct RawWakerVTable {
     /// This function will be called when the [`RawWaker`] gets cloned, e.g. when
     /// the [`Waker`] in which the [`RawWaker`] is stored gets cloned.

src/bootstrap/stdlib-semver-check-stamp

@@ -2,4 +2,4 @@ Change this file to explicitly acknowledge making a breaking change to the Rust
 If this file is modified in the same PR as the breaking change, then CI will not fail due to the
 breaking change being detected by cargo-semver-checks.
 
-Last change is for: https://github.com/rust-lang/rust/pull/162909
+Last change is for: https://github.com/rust-lang/rust/pull/158186