[ci] Roll pinned nightly toolchain

Cargo.toml

@@ -44,7 +44,7 @@ zerocopy-panic-in-const = "1.57.0"
 [package.metadata.ci]
 # The versions of the stable and nightly compiler toolchains to use in CI.
 pinned-stable = "1.76.0"
-pinned-nightly = "nightly-2024-02-26"
+pinned-nightly = "nightly-2024-02-28"
 
 [package.metadata.docs.rs]
 all-features = true

src/pointer/ptr.rs

@@ -946,10 +946,7 @@ mod _casts {
  pub unsafe fn cast_unsized<U: 'a + ?Sized, F: FnOnce(*mut T) -> *mut U>(
  self,
  cast: F,
- ) -> Ptr<'a, U, (I::Aliasing, invariant::Any, invariant::Any)>
- where
- U: 'a,
- {
+ ) -> Ptr<'a, U, (I::Aliasing, invariant::Any, invariant::Any)> {
  let ptr = cast(self.as_non_null().as_ptr());
 
  // SAFETY: Caller promises that `cast` is just a cast. We call
@@ -1114,12 +1111,10 @@ mod _casts {
  /// # Panics
  ///
  /// Panics if `U` is a DST whose trailing slice element is zero-sized.
- pub(crate) fn try_cast_into<U: 'a + ?Sized + KnownLayout>(
+ pub(crate) fn try_cast_into<U: 'a + ?Sized + KnownLayout + NoCell>(
  &self,
  cast_type: CastType,
  ) -> Option<(Ptr<'a, U, (I::Aliasing, invariant::Aligned, invariant::Initialized)>, usize)>
- where
- U: NoCell,
  {
  // PANICS: By invariant, the byte range addressed by `self.ptr` does
  // not wrap around the address space. This implies that the sum of
@@ -1215,12 +1210,9 @@ mod _casts {
  /// references the same byte range as `self`.
  #[allow(unused)]
  #[inline(always)]
- pub(crate) fn try_cast_into_no_leftover<U: 'a + ?Sized + KnownLayout>(
+ pub(crate) fn try_cast_into_no_leftover<U: 'a + ?Sized + KnownLayout + NoCell>(
  &self,
- ) -> Option<Ptr<'a, U, (I::Aliasing, invariant::Aligned, invariant::Initialized)>>
- where
- U: NoCell,
- {
+ ) -> Option<Ptr<'a, U, (I::Aliasing, invariant::Aligned, invariant::Initialized)>> {
  // TODO(#67): Remove this allow. See NonNulSlicelExt for more
  // details.
  #[allow(unstable_name_collisions)]