diff -audpNr third_party/rust/bytemuck.orig/v1/BUILD.gn third_party/rust/bytemuck/v1/BUILD.gn
--- third_party/rust/bytemuck.orig/v1/BUILD.gn	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/bytemuck/v1/BUILD.gn	2026-04-24 20:41:57.730845000 +0900
@@ -19,6 +19,7 @@ cargo_crate("lib") {
     "//third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/anybitpattern.rs",
     "//third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/checked.rs",
     "//third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/contiguous.rs",
+    "//third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/derive.rs",
     "//third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/internal.rs",
     "//third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/lib.rs",
     "//third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/must.rs",
@@ -38,16 +39,20 @@ cargo_crate("lib") {
   cargo_pkg_name = "bytemuck"
   cargo_pkg_description = "A crate for mucking around with piles of bytes."
   cargo_pkg_repository = "https://github.com/Lokathor/bytemuck"
-  cargo_pkg_version = "1.23.1"
+  cargo_pkg_version = "1.25.0"
 
   allow_unsafe = true
 
-  deps = [ "//third_party/rust/bytemuck_derive/v1:lib" ]
+  deps = [
+    "//third_party/rust/bytemuck_derive/v1:lib",
+    "//third_party/rust/rustversion/v1:lib",
+  ]
   features = [
     "bytemuck_derive",
     "derive",
+    "extern_crate_alloc",
     "min_const_generics",
-    "nightly_portable_simd",
+    "rustversion",
   ]
 
   # `gnrt_config.toml` for this crate specifies `allow_unstable_features`.
diff -audpNr third_party/rust/bytemuck.orig/v1/README.chromium third_party/rust/bytemuck/v1/README.chromium
--- third_party/rust/bytemuck.orig/v1/README.chromium	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/bytemuck/v1/README.chromium	2026-04-24 20:41:57.730915000 +0900
@@ -1,8 +1,8 @@ URL: https://crates.io/crates/bytemuck
 Name: bytemuck
 URL: https://crates.io/crates/bytemuck
-Version: 1.23.1
-Revision: ebb132677b7599ac30b6455d64a091edc73ddb95
-Update Mechanism: Manual
+Version: 1.25.0
+Revision: 164cedda0eae131bc6cb67902599f4ec253642ca
+Update Mechanism: Manual (https://crbug.com/449898466)
 License: Apache-2.0
 License File: //third_party/rust/chromium_crates_io/vendor/bytemuck-v1/LICENSE-APACHE
 Shipped: yes
diff -audpNr third_party/rust/rustversion.orig/v1/BUILD.gn third_party/rust/rustversion/v1/BUILD.gn
--- third_party/rust/rustversion.orig/v1/BUILD.gn	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/rustversion/v1/BUILD.gn	2026-04-24 20:42:01.668464000 +0900
@@ -38,13 +38,13 @@ cargo_crate("lib") {
   cargo_pkg_description =
       "Conditional compilation according to rustc compiler version"
   cargo_pkg_repository = "https://github.com/dtolnay/rustversion"
-  cargo_pkg_version = "1.0.21"
+  cargo_pkg_version = "1.0.22"
 
   allow_unsafe = false
 
   build_root = "//third_party/rust/chromium_crates_io/vendor/rustversion-v1/build/build.rs"
   build_sources = [ "//third_party/rust/chromium_crates_io/vendor/rustversion-v1/build/build.rs" ]
-  build_script_inputs = [ "//third_party/rust/chromium_crates_io/vendor/rustversion-v1/src/../build/rustc.rs" ]
+  build_script_inputs = [ "//third_party/rust/chromium_crates_io/vendor/rustversion-v1/src/../../rustversion-v1/build/rustc.rs" ]
   build_script_outputs = [ "version.expr" ]
 
   # Only for usage from third-party crates. Add the crate to
diff -audpNr third_party/rust/rustversion.orig/v1/README.chromium third_party/rust/rustversion/v1/README.chromium
--- third_party/rust/rustversion.orig/v1/README.chromium	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/rustversion/v1/README.chromium	2026-04-24 20:42:01.668472000 +0900
@@ -1,8 +1,8 @@ URL: https://crates.io/crates/rustversion
 Name: rustversion
 URL: https://crates.io/crates/rustversion
-Version: 1.0.21
-Revision: 1f833903f93e6dbabf9eebb5935fcafd2f6f0ce1
-Update Mechanism: Manual
+Version: 1.0.22
+Revision: 9e86f839b6a34a7d9398f243d88bf400b7fa1f7c
+Update Mechanism: Manual (https://crbug.com/449898466)
 License: Apache-2.0
 License File: //third_party/rust/chromium_crates_io/vendor/rustversion-v1/LICENSE-APACHE
 Shipped: yes
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/.cargo_vcs_info.json third_party/rust/chromium_crates_io/vendor/bytemuck-v1/.cargo_vcs_info.json
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/.cargo_vcs_info.json	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/.cargo_vcs_info.json	2026-04-24 20:42:20.313218000 +0900
@@ -1,6 +1,6 @@
 {
   "git": {
-    "sha1": "ebb132677b7599ac30b6455d64a091edc73ddb95"
+    "sha1": "164cedda0eae131bc6cb67902599f4ec253642ca"
   },
   "path_in_vcs": ""
 }
\ No newline at end of file
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/.github/workflows/rust.yml third_party/rust/chromium_crates_io/vendor/bytemuck-v1/.github/workflows/rust.yml
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/.github/workflows/rust.yml	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/.github/workflows/rust.yml	2026-04-24 20:42:20.313390000 +0900
@@ -19,7 +19,7 @@ jobs:
         include:
         # versions (all on linux-x86_64)
         - { rust: 1.34.0, os: ubuntu-latest }
-        - { rust: 1.61.0, os: ubuntu-latest }
+        - { rust: 1.68.0, os: ubuntu-latest }
         - { rust: stable, os: ubuntu-latest }
         - { rust: beta, os: ubuntu-latest }
         - { rust: nightly, os: ubuntu-latest }
@@ -38,19 +38,20 @@ jobs:
     - run: cargo test --verbose --no-default-features
     - run: cargo test --verbose
     - run: cargo test --verbose --features derive
-      if: matrix.rust == '1.61.0'
+      if: matrix.rust == '1.68.0'
     - run: cargo test --verbose --all-features
       if: matrix.rust == 'nightly'
     - run: cargo test --verbose --manifest-path=derive/Cargo.toml --all-features
       if: matrix.rust == 'nightly'
+    - run: cd contiguous_bitset && cargo test
+      if: matrix.rust == 'stable'
 
   cross-test:
     name: Test on ${{ matrix.target }} with cross
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        # we once had mips runners for Big-endian coverage but those got demoted to tier 3.
-        target: [i686-unknown-linux-gnu]
+        target: [i686-unknown-linux-gnu, s390x-unknown-linux-gnu]
     steps:
     - uses: hecrj/setup-rust-action@v1
       with:
@@ -59,6 +60,7 @@ jobs:
     - run: cargo install cross
     - run: cross test --verbose --target=${{ matrix.target }} --no-default-features
     - run: cross test --verbose --target=${{ matrix.target }}
+    - run: cd derive && cross test --verbose --target=${{ matrix.target }}
     - run: cross test --verbose --target=${{ matrix.target }} --all-features
       if: matrix.rust == 'nightly'
     - run: cross test --verbose --target=${{ matrix.target }} --manifest-path=derive/Cargo.toml --all-features
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/.gitignore third_party/rust/chromium_crates_io/vendor/bytemuck-v1/.gitignore
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/.gitignore	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/.gitignore	2026-04-24 20:42:20.313195000 +0900
@@ -1,10 +1,6 @@ Cargo.lock
 
 Cargo.lock
-/target/
-/.vscode/
-
-# These are backup files generated by rustfmt
 **/*.rs.bk
 
-/derive/target/
-/derive/.vscode/
+**/target/
+**/.vscode/
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/Cargo.lock third_party/rust/chromium_crates_io/vendor/bytemuck-v1/Cargo.lock
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/Cargo.lock	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/Cargo.lock	2026-04-24 20:42:20.313351000 +0900
@@ -4,16 +4,17 @@ name = "bytemuck"
 
 [[package]]
 name = "bytemuck"
-version = "1.23.1"
+version = "1.25.0"
 dependencies = [
  "bytemuck_derive",
+ "rustversion",
 ]
 
 [[package]]
 name = "bytemuck_derive"
-version = "1.9.3"
+version = "1.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ecc273b49b3205b83d648f0690daa588925572cc5063745bfe547fe7ec8e1a1"
+checksum = "f9abbd1bc6865053c427f7198e6af43bfdedc55ab791faed4fbd361d789575ff"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -37,6 +38,12 @@ dependencies = [
 dependencies = [
  "proc-macro2",
 ]
+
+[[package]]
+name = "rustversion"
+version = "1.0.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b39cdef0fa800fc44525c84ccb54a029961a8215f9619753635a9c0d2538d46d"
 
 [[package]]
 name = "syn"
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/Cargo.toml third_party/rust/chromium_crates_io/vendor/bytemuck-v1/Cargo.toml
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/Cargo.toml	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/Cargo.toml	2026-04-24 20:42:20.313203000 +0900
@@ -12,10 +12,14 @@ name = "bytemuck"
 [package]
 edition = "2018"
 name = "bytemuck"
-version = "1.23.1"
+version = "1.25.0"
 authors = ["Lokathor <zefria@gmail.com>"]
 build = false
-exclude = ["/pedantic.bat"]
+exclude = [
+    "/pedantic.bat",
+    "derive/",
+    "contiguous_bitset/",
+]
 autolib = false
 autobins = false
 autoexamples = false
@@ -84,7 +88,7 @@ nightly_float = []
 must_cast_extra = ["must_cast"]
 nightly_docs = []
 nightly_float = []
-nightly_portable_simd = []
+nightly_portable_simd = ["rustversion"]
 nightly_stdsimd = []
 pod_saturating = []
 track_caller = []
@@ -136,7 +140,11 @@ path = "tests/wrapper_forgets.rs"
 path = "tests/wrapper_forgets.rs"
 
 [dependencies.bytemuck_derive]
-version = "1.4.1"
+version = "1.10.2"
+optional = true
+
+[dependencies.rustversion]
+version = "1.0.22"
 optional = true
 
 [lints.rust.unexpected_cfgs]
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/changelog.md third_party/rust/chromium_crates_io/vendor/bytemuck-v1/changelog.md
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/changelog.md	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/changelog.md	2026-04-24 20:42:20.313231000 +0900
@@ -1,5 +1,20 @@
 # `bytemuck` changelog
 
+## 1.25
+
+* [Remove extern "stdcall" fn ptr impls on non-x86-32 windows.](https://github.com/Lokathor/bytemuck/pull/333)
+* [Fix nightly_portable_simd after LaneCount removal.](https://github.com/Lokathor/bytemuck/pull/344)
+
+## 1.24
+
+* [use new stable avx512 types from rust 1.89](https://github.com/Lokathor/bytemuck/pull/322)
+* [impl AnyBitPattern for [MaybeUninit<T: AnyBitPattern>; N]](https://github.com/Lokathor/bytemuck/pull/317)
+* bump `derive` minimum version.
+
+## 1.23.2
+
+* bump `derive` minimum version.
+
 ## 1.23.1
 
 * Added a windows-only `ZeroableInOption` impl for "stdcall" functions.
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/rustfmt.toml third_party/rust/chromium_crates_io/vendor/bytemuck-v1/rustfmt.toml
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/rustfmt.toml	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/rustfmt.toml	2026-04-24 20:42:20.313331000 +0900
@@ -3,7 +3,7 @@ edition = "2018"
 
 # Stable
 edition = "2018"
-fn_args_layout = "Compressed"
+fn_params_layout = "Compressed"
 max_width = 80
 tab_spaces = 2
 use_field_init_shorthand = true
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/anybitpattern.rs third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/anybitpattern.rs
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/anybitpattern.rs	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/anybitpattern.rs	2026-04-24 20:42:20.313473000 +0900
@@ -62,3 +62,16 @@ unsafe impl<T> AnyBitPattern for core::mem::MaybeUnini
 )]
 unsafe impl<T> AnyBitPattern for core::mem::MaybeUninit<T> where T: AnyBitPattern
 {}
+
+#[cfg(all(feature = "zeroable_maybe_uninit", feature = "min_const_generics"))]
+#[cfg_attr(
+  feature = "nightly_docs",
+  doc(cfg(all(
+    feature = "zeroable_maybe_uninit",
+    feature = "min_const_generics"
+  )))
+)]
+unsafe impl<T, const N: usize> AnyBitPattern for [core::mem::MaybeUninit<T>; N] where
+  T: AnyBitPattern
+{
+}
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/derive.rs third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/derive.rs
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/derive.rs	1970-01-01 09:00:00.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/derive.rs	2026-04-24 20:42:20.313517000 +0900
@@ -0,0 +1,19 @@
+//! This module contains some helpers for the derive macros.
+
+/// A trait that can be used to convert the type of a byte array to an integer
+/// type of the same size.
+pub trait EnumTagIntegerBytes {
+  type Integer;
+}
+
+macro_rules! enum_tag_integer_impls {
+  ($($ty:ty),*) => {
+    $(
+      impl EnumTagIntegerBytes for [u8; core::mem::size_of::<$ty>()] {
+        type Integer = $ty;
+      }
+    )*
+  };
+}
+
+enum_tag_integer_impls!(u8, u16, u32, u64, u128);
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/lib.rs third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/lib.rs
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/lib.rs	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/lib.rs	2026-04-24 20:42:20.313502000 +0900
@@ -5,16 +5,10 @@
 #![allow(clippy::uninlined_format_args)]
 #![allow(clippy::result_unit_err)]
 #![allow(clippy::type_complexity)]
+#![allow(clippy::manual_is_multiple_of)]
 #![cfg_attr(feature = "nightly_docs", feature(doc_cfg))]
 #![cfg_attr(feature = "nightly_portable_simd", feature(portable_simd))]
 #![cfg_attr(feature = "nightly_float", feature(f16, f128))]
-#![cfg_attr(
-  all(
-    feature = "nightly_stdsimd",
-    any(target_arch = "x86_64", target_arch = "x86")
-  ),
-  feature(stdarch_x86_avx512)
-)]
 
 //! This crate gives small utilities for casting between plain data types.
 //!
@@ -229,7 +223,14 @@ pub use transparent::*;
 mod transparent;
 pub use transparent::*;
 
+// This module is just an implementation detail for the derive macros. It needs
+// to be public to be usable from the macros, but it shouldn't be considered
+// part of bytemuck's public API.
 #[cfg(feature = "derive")]
+#[doc(hidden)]
+pub mod derive;
+
+#[cfg(feature = "derive")]
 #[cfg_attr(feature = "nightly_docs", doc(cfg(feature = "derive")))]
 pub use bytemuck_derive::{
   AnyBitPattern, ByteEq, ByteHash, CheckedBitPattern, Contiguous, NoUninit,
@@ -562,7 +563,7 @@ pub fn fill_zeroes<T: Zeroable>(slice: &mut [T]) {
     // case one of the intermediate drops does a panic.
     slice.iter_mut().for_each(write_zeroes);
   } else {
-    // Otherwise we can be really fast and just fill everthing with zeros.
+    // Otherwise we can be really fast and just fill everything with zeros.
     let len = slice.len();
     unsafe { core::ptr::write_bytes(slice.as_mut_ptr(), 0u8, len) }
   }
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/must.rs third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/must.rs
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/must.rs	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/must.rs	2026-04-24 20:42:20.313511000 +0900
@@ -114,7 +114,7 @@ maybe_const_fn! {
 /// ## Failure
 ///
 /// * If the target type has a greater alignment requirement.
-/// * If the target element type doesn't evenly fit into the the current element
+/// * If the target element type doesn't evenly fit into the current element
 ///   type (eg: 3 `u16` values is 1.5 `u32` values, so that's a failure).
 /// * Similarly, you can't convert from a non-[ZST](https://doc.rust-lang.org/nomicon/exotic-sizes.html#zero-sized-types-zsts)
 ///   to a ZST (e.g. 3 `u8` values is not any number of `()` values).
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/no_uninit.rs third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/no_uninit.rs
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/no_uninit.rs	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/no_uninit.rs	2026-04-24 20:42:20.313480000 +0900
@@ -21,6 +21,9 @@ use core::num::{
 /// for a type that is only [`NoUninit`], consider also implementing
 /// [`CheckedBitPattern`][crate::CheckedBitPattern].
 ///
+/// The rules for padding for various types and representations are documented
+/// in the Rust reference section on [type layout].
+///
 /// # Derive
 ///
 /// A `#[derive(NoUninit)]` macro is provided under the `derive` feature flag
@@ -47,8 +50,12 @@ use core::num::{
 /// * Structs need to be `repr(C)` or `repr(transparent)`. In the case of
 ///   `repr(C)`, the `packed` and `align` repr modifiers can be used as long as
 ///   all other rules end up being followed.
-/// * Enums need to have an explicit `#[repr(Int)]`
-/// * Enums must have only fieldless variants
+/// * Enums need to be `#[repr(Int)]`, `#[repr(C)]`, or both.
+/// * Enums may have fields. If the enum has fields,
+///     * Each variant's fields must individually follow the same rules as a struct
+///     * All variants must be the same size, and require no padding-to-alignment
+///     * There must be no padding needed between the discriminant type and the
+///       "fields struct" of any variant
 /// * It is disallowed for types to contain pointer types, `Cell`, `UnsafeCell`,
 ///   atomics, and any other forms of interior mutability.
 /// * More precisely: A shared reference to the type must allow reads, and
@@ -58,6 +65,8 @@ use core::num::{
 ///   it to deal with atomic and cells etc. We require the sharing predicate to
 ///   be trivial and permit only read-only access.
 /// * There's probably more, don't mess it up (I mean it).
+///
+/// [type layout]: <https://doc.rust-lang.org/reference/type-layout.html>
 pub unsafe trait NoUninit: Sized + Copy + 'static {}
 
 unsafe impl<T: Pod> NoUninit for T {}
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/pod.rs third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/pod.rs
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/pod.rs	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/pod.rs	2026-04-24 20:43:08.508932000 +0900
@@ -143,6 +143,7 @@ impl_unsafe_marker_for_simd!(
   }
 );
 
+#[rustversion::before(1.95)] // See https://github.com/Lokathor/bytemuck/issues/343
 #[cfg(feature = "nightly_portable_simd")]
 #[cfg_attr(
   feature = "nightly_docs",
@@ -155,29 +156,41 @@ where
 {
 }
 
+#[rustversion::since(1.95)] // See https://github.com/Lokathor/bytemuck/issues/343
+#[cfg(feature = "nightly_portable_simd")]
+#[cfg_attr(
+  feature = "nightly_docs",
+  doc(cfg(feature = "nightly_portable_simd"))
+)]
+unsafe impl<T, const N: usize> Pod for core::simd::Simd<T, N>
+where
+  T: core::simd::SimdElement + Pod,
+{
+}
+
 impl_unsafe_marker_for_simd!(
-  #[cfg(all(target_arch = "x86", any(feature = "nightly_stdsimd", feature = "avx512_simd")))]
+  #[cfg(all(target_arch = "x86", feature = "avx512_simd"))]
   unsafe impl Pod for x86::{
     __m512, __m512d, __m512i
   }
 );
 
 impl_unsafe_marker_for_simd!(
-  #[cfg(all(target_arch = "x86_64", any(feature = "nightly_stdsimd", feature = "avx512_simd")))]
+  #[cfg(all(target_arch = "x86_64", feature = "avx512_simd"))]
   unsafe impl Pod for x86_64::{
     __m512, __m512d, __m512i
   }
 );
 
 impl_unsafe_marker_for_simd!(
-  #[cfg(all(target_arch = "x86", feature = "nightly_stdsimd"))]
+    #[cfg(all(target_arch = "x86", feature = "avx512_simd"))]
   unsafe impl Pod for x86::{
     __m128bh, __m256bh, __m512bh
   }
 );
 
 impl_unsafe_marker_for_simd!(
-  #[cfg(all(target_arch = "x86_64", feature = "nightly_stdsimd"))]
+    #[cfg(all(target_arch = "x86_64", feature = "avx512_simd"))]
   unsafe impl Pod for x86_64::{
     __m128bh, __m256bh, __m512bh
   }
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/zeroable.rs third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/zeroable.rs
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/zeroable.rs	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/zeroable.rs	2026-04-24 20:43:28.311780000 +0900
@@ -222,6 +222,7 @@ impl_unsafe_marker_for_simd!(
     }
 );
 
+#[rustversion::before(1.95)] // See https://github.com/Lokathor/bytemuck/issues/343
 #[cfg(feature = "nightly_portable_simd")]
 #[cfg_attr(
   feature = "nightly_docs",
@@ -234,29 +235,41 @@ where
 {
 }
 
+#[rustversion::since(1.95)] // See https://github.com/Lokathor/bytemuck/issues/343
+#[cfg(feature = "nightly_portable_simd")]
+#[cfg_attr(
+  feature = "nightly_docs",
+  doc(cfg(feature = "nightly_portable_simd"))
+)]
+unsafe impl<T, const N: usize> Zeroable for core::simd::Simd<T, N>
+where
+  T: core::simd::SimdElement + Zeroable,
+{
+}
+
 impl_unsafe_marker_for_simd!(
-  #[cfg(all(target_arch = "x86", any(feature = "nightly_stdsimd", feature = "avx512_simd")))]
+  #[cfg(all(target_arch = "x86", feature = "avx512_simd"))]
   unsafe impl Zeroable for x86::{
     __m512, __m512d, __m512i
   }
 );
 
 impl_unsafe_marker_for_simd!(
-  #[cfg(all(target_arch = "x86_64", any(feature = "nightly_stdsimd", feature = "avx512_simd")))]
+  #[cfg(all(target_arch = "x86_64", feature = "avx512_simd"))]
   unsafe impl Zeroable for x86_64::{
     __m512, __m512d, __m512i
   }
 );
 
 impl_unsafe_marker_for_simd!(
-  #[cfg(all(target_arch = "x86", feature = "nightly_stdsimd"))]
+  #[cfg(all(target_arch = "x86",  feature = "avx512_simd"))]
   unsafe impl Zeroable for x86::{
     __m128bh, __m256bh, __m512bh
   }
 );
 
 impl_unsafe_marker_for_simd!(
-  #[cfg(all(target_arch = "x86_64", feature = "nightly_stdsimd"))]
+  #[cfg(all(target_arch = "x86_64", feature = "avx512_simd"))]
   unsafe impl Zeroable for x86_64::{
     __m128bh, __m256bh, __m512bh
   }
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/zeroable_in_option.rs third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/zeroable_in_option.rs
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/src/zeroable_in_option.rs	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/src/zeroable_in_option.rs	2026-04-24 20:42:20.313535000 +0900
@@ -52,9 +52,9 @@ macro_rules! impl_for_fn {
         unsafe impl<$($ArgTy,)* R> ZeroableInOption for unsafe extern "C" fn($($ArgTy,)*) -> R {}
         unsafe impl<$($ArgTy,)* R> ZeroableInOption for extern "system" fn($($ArgTy,)*) -> R {}
         unsafe impl<$($ArgTy,)* R> ZeroableInOption for unsafe extern "system" fn($($ArgTy,)*) -> R {}
-        #[cfg(target_os="windows")]
+        #[cfg(all(target_os="windows", target_arch = "x86"))]
         unsafe impl<$($ArgTy,)* R> ZeroableInOption for extern "stdcall" fn($($ArgTy,)*) -> R {}
-        #[cfg(target_os="windows")]
+        #[cfg(all(target_os="windows", target_arch = "x86"))]
         unsafe impl<$($ArgTy,)* R> ZeroableInOption for unsafe extern "stdcall" fn($($ArgTy,)*) -> R {}
         #[cfg(feature = "zeroable_unwind_fn")]
         impl_for_unwind_fn!($($ArgTy),*);
diff -audpNr third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/tests/std_tests.rs third_party/rust/chromium_crates_io/vendor/bytemuck-v1/tests/std_tests.rs
--- third_party/rust/chromium_crates_io/vendor/bytemuck-v1.orig/tests/std_tests.rs	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/bytemuck-v1/tests/std_tests.rs	2026-04-24 20:42:20.313255000 +0900
@@ -58,7 +58,7 @@ fn test_try_from_box_bytes() {
 
   // Different layout: target alignment is less than source alignment.
   assert_eq!(
-    try_from_box_bytes::<u32>(Box::new(0u64).into()).map_err(|(x, _)| x),
+    try_from_box_bytes::<u16>(Box::new(0u64).into()).map_err(|(x, _)| x),
     Err(PodCastError::AlignmentMismatch)
   );
 
diff -audpNr third_party/rust/chromium_crates_io/vendor/rustversion-v1.orig/.cargo_vcs_info.json third_party/rust/chromium_crates_io/vendor/rustversion-v1/.cargo_vcs_info.json
--- third_party/rust/chromium_crates_io/vendor/rustversion-v1.orig/.cargo_vcs_info.json	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/rustversion-v1/.cargo_vcs_info.json	2026-04-24 20:42:24.057880000 +0900
@@ -1,6 +1,6 @@
 {
   "git": {
-    "sha1": "1f833903f93e6dbabf9eebb5935fcafd2f6f0ce1"
+    "sha1": "9e86f839b6a34a7d9398f243d88bf400b7fa1f7c"
   },
   "path_in_vcs": ""
 }
\ No newline at end of file
diff -audpNr third_party/rust/chromium_crates_io/vendor/rustversion-v1.orig/.github/workflows/ci.yml third_party/rust/chromium_crates_io/vendor/rustversion-v1/.github/workflows/ci.yml
--- third_party/rust/chromium_crates_io/vendor/rustversion-v1.orig/.github/workflows/ci.yml	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/rustversion-v1/.github/workflows/ci.yml	2026-04-24 20:42:24.059495000 +0900
@@ -35,6 +35,9 @@ jobs:
         run: echo RUSTFLAGS=${RUSTFLAGS}\ -Zrandomize-layout >> $GITHUB_ENV
         if: matrix.rust == 'nightly'
       - run: cargo test
+      - name: RUSTFLAGS=-Zfmt-debug=none cargo test
+        run: RUSTFLAGS=${RUSTFLAGS}\ -Zfmt-debug=none cargo test
+        if: matrix.rust == 'nightly'
       - uses: actions/upload-artifact@v4
         if: matrix.rust == 'nightly' && always()
         with:
@@ -96,10 +99,7 @@ jobs:
     timeout-minutes: 45
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: nightly-2025-05-16  # https://github.com/rust-lang/miri/issues/4323
-          components: miri, rust-src
+      - uses: dtolnay/rust-toolchain@miri
       - run: cargo miri setup
       - run: cargo miri test
         env:
diff -audpNr third_party/rust/chromium_crates_io/vendor/rustversion-v1.orig/Cargo.lock third_party/rust/chromium_crates_io/vendor/rustversion-v1/Cargo.lock
--- third_party/rust/chromium_crates_io/vendor/rustversion-v1.orig/Cargo.lock	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/rustversion-v1/Cargo.lock	2026-04-24 20:42:24.059215000 +0900
@@ -22,15 +22,15 @@ name = "hashbrown"
 
 [[package]]
 name = "hashbrown"
-version = "0.15.3"
+version = "0.15.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "84b26c544d002229e640969970a2e74021aadf6e2f96372b9c58eff97de08eb3"
+checksum = "9229cfe53dfd69f0609a49f65461bd93001ea1ef889cd5529dd176593f5338a1"
 
 [[package]]
 name = "indexmap"
-version = "2.9.0"
+version = "2.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cea70ddb795996207ad57735b50c5982d8844f38ba9ee5f1aedcfb708a2aa11e"
+checksum = "fe4cd85333e22411419a0bcae1297d25e58c9443848b11dc6a86fefe8c78a661"
 dependencies = [
  "equivalent",
  "hashbrown",
@@ -44,9 +44,9 @@ name = "memchr"
 
 [[package]]
 name = "memchr"
-version = "2.7.4"
+version = "2.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+checksum = "32a282da65faaf38286cf3be983213fcf1d2e2a58700e808f83f4ea9a4804bc0"
 
 [[package]]
 name = "proc-macro2"
@@ -68,7 +68,7 @@ name = "rustversion"
 
 [[package]]
 name = "rustversion"
-version = "1.0.21"
+version = "1.0.22"
 dependencies = [
  "trybuild",
 ]
@@ -101,9 +101,9 @@ name = "serde_json"
 
 [[package]]
 name = "serde_json"
-version = "1.0.140"
+version = "1.0.142"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "20068b6e96dc6c9bd23e01df8827e6c7e1f2fddd43c21810382803c136b99373"
+checksum = "030fedb782600dcbd6f02d479bf0d817ac3bb40d644745b769d6a96bc3afc5a7"
 dependencies = [
  "itoa",
  "memchr",
@@ -113,18 +113,18 @@ name = "serde_spanned"
 
 [[package]]
 name = "serde_spanned"
-version = "0.6.8"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87607cb1398ed59d48732e575a4c28a7a8ebf2454b964fe3f224f2afc07909e1"
+checksum = "40734c41988f7306bb04f0ecf60ec0f3f1caa34290e4e8ea471dcd3346483b83"
 dependencies = [
  "serde",
 ]
 
 [[package]]
 name = "syn"
-version = "2.0.101"
+version = "2.0.104"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ce2b7fc941b3a24138a0a7cf8e858bfc6a992e7978a068a5c760deb0ed43caf"
+checksum = "17b6f705963418cdb9927482fa304bc562ece2fdd4f616084c50b7023b435a40"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -148,50 +148,48 @@ name = "toml"
 
 [[package]]
 name = "toml"
-version = "0.8.22"
+version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05ae329d1f08c4d17a59bed7ff5b5a769d062e64a62d34a3261b219e62cd5aae"
+checksum = "75129e1dc5000bfbaa9fee9d1b21f974f9fbad9daec557a521ee6e080825f6e8"
 dependencies = [
+ "indexmap",
  "serde",
  "serde_spanned",
  "toml_datetime",
- "toml_edit",
+ "toml_parser",
+ "toml_writer",
+ "winnow",
 ]
 
 [[package]]
 name = "toml_datetime"
-version = "0.6.9"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3da5db5a963e24bc68be8b17b6fa82814bb22ee8660f192bb182771d498f09a3"
+checksum = "bade1c3e902f58d73d3f294cd7f20391c1cb2fbcb643b73566bc773971df91e3"
 dependencies = [
  "serde",
 ]
 
 [[package]]
-name = "toml_edit"
-version = "0.22.26"
+name = "toml_parser"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "310068873db2c5b3e7659d2cc35d21855dbafa50d1ce336397c666e3cb08137e"
+checksum = "b551886f449aa90d4fe2bdaa9f4a2577ad2dde302c61ecf262d80b116db95c10"
 dependencies = [
- "indexmap",
- "serde",
- "serde_spanned",
- "toml_datetime",
- "toml_write",
  "winnow",
 ]
 
 [[package]]
-name = "toml_write"
-version = "0.1.1"
+name = "toml_writer"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bfb942dfe1d8e29a7ee7fcbde5bd2b9a25fb89aa70caea2eba3bee836ff41076"
+checksum = "fcc842091f2def52017664b53082ecbbeb5c7731092bad69d2c63050401dfd64"
 
 [[package]]
 name = "trybuild"
-version = "1.0.105"
+version = "1.0.110"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1c9bf9513a2f4aeef5fdac8677d7d349c79fdbcc03b9c86da6e9d254f1e43be2"
+checksum = "32e257d7246e7a9fd015fb0b28b330a8d4142151a33f03e6a497754f4b1f6a8e"
 dependencies = [
  "dissimilar",
  "glob",
@@ -293,9 +291,6 @@ name = "winnow"
 
 [[package]]
 name = "winnow"
-version = "0.7.10"
+version = "0.7.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c06928c8748d81b05c9be96aad92e1b6ff01833332f281e8cfca3be4b35fc9ec"
-dependencies = [
- "memchr",
-]
+checksum = "f3edebf492c8125044983378ecb5766203ad3b4c2f7a922bd7dd207f6d443e95"
diff -audpNr third_party/rust/chromium_crates_io/vendor/rustversion-v1.orig/Cargo.toml third_party/rust/chromium_crates_io/vendor/rustversion-v1/Cargo.toml
--- third_party/rust/chromium_crates_io/vendor/rustversion-v1.orig/Cargo.toml	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/rustversion-v1/Cargo.toml	2026-04-24 20:42:24.057769000 +0900
@@ -13,7 +13,7 @@ name = "rustversion"
 edition = "2018"
 rust-version = "1.31"
 name = "rustversion"
-version = "1.0.21"
+version = "1.0.22"
 authors = ["David Tolnay <dtolnay@gmail.com>"]
 build = "build/build.rs"
 autolib = false
@@ -33,6 +33,7 @@ repository = "https://github.com/dtolnay/rustversion"
 repository = "https://github.com/dtolnay/rustversion"
 
 [package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
 rustdoc-args = [
     "--generate-link-to-definition",
     "--extern-html-root-url=core=https://doc.rust-lang.org",
@@ -40,7 +41,6 @@ rustdoc-args = [
     "--extern-html-root-url=std=https://doc.rust-lang.org",
     "--extern-html-root-url=proc_macro=https://doc.rust-lang.org",
 ]
-targets = ["x86_64-unknown-linux-gnu"]
 
 [lib]
 name = "rustversion"
diff -audpNr third_party/rust/chromium_crates_io/vendor/rustversion-v1.orig/src/expand.rs third_party/rust/chromium_crates_io/vendor/rustversion-v1/src/expand.rs
--- third_party/rust/chromium_crates_io/vendor/rustversion-v1.orig/src/expand.rs	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/rustversion-v1/src/expand.rs	2026-04-24 20:42:24.060050000 +0900
@@ -24,7 +24,7 @@ fn try_cfg(introducer: &str, args: TokenStream, input:
     token::parse_end(full_args)?;
 
     if expr.eval(crate::RUSTVERSION) {
-        Ok(input)
+        Ok(allow_incompatible_msrv(input))
     } else {
         Ok(TokenStream::new())
     }
@@ -35,11 +35,11 @@ pub fn try_attr(args: attr::Args, input: TokenStream) 
         return Ok(input);
     }
 
-    match args.then {
-        Then::Const(const_token) => constfn::insert_const(input, const_token),
+    let output = match args.then {
+        Then::Const(const_token) => constfn::insert_const(input, const_token)?,
         Then::Attribute(then) => {
-            // #[cfg_attr(all(), #then)]
-            Ok(TokenStream::from_iter(
+            TokenStream::from_iter(
+                // #[cfg_attr(all(), #then)]
                 vec![
                     TokenTree::Punct(Punct::new('#', Spacing::Alone)),
                     TokenTree::Group(Group::new(
@@ -66,7 +66,35 @@ pub fn try_attr(args: attr::Args, input: TokenStream) 
                 ]
                 .into_iter()
                 .chain(input),
-            ))
+            )
         }
-    }
+    };
+
+    Ok(allow_incompatible_msrv(output))
+}
+
+fn allow_incompatible_msrv(input: TokenStream) -> TokenStream {
+    TokenStream::from_iter(
+        // #[allow(clippy::incompatible_msrv)]
+        vec![
+            TokenTree::Punct(Punct::new('#', Spacing::Alone)),
+            TokenTree::Group(Group::new(
+                Delimiter::Bracket,
+                TokenStream::from_iter(vec![
+                    TokenTree::Ident(Ident::new("allow", Span::call_site())),
+                    TokenTree::Group(Group::new(
+                        Delimiter::Parenthesis,
+                        TokenStream::from_iter(vec![
+                            TokenTree::Ident(Ident::new("clippy", Span::call_site())),
+                            TokenTree::Punct(Punct::new(':', Spacing::Joint)),
+                            TokenTree::Punct(Punct::new(':', Spacing::Alone)),
+                            TokenTree::Ident(Ident::new("incompatible_msrv", Span::call_site())),
+                        ]),
+                    )),
+                ]),
+            )),
+        ]
+        .into_iter()
+        .chain(input),
+    )
 }
diff -audpNr third_party/rust/chromium_crates_io/vendor/rustversion-v1.orig/src/lib.rs third_party/rust/chromium_crates_io/vendor/rustversion-v1/src/lib.rs
--- third_party/rust/chromium_crates_io/vendor/rustversion-v1.orig/src/lib.rs	2025-10-14 06:25:57.000000000 +0900
+++ third_party/rust/chromium_crates_io/vendor/rustversion-v1/src/lib.rs	2026-04-24 20:42:24.059903000 +0900
@@ -175,7 +175,7 @@
 //!
 //! <br>
 
-#![doc(html_root_url = "https://docs.rs/rustversion/1.0.21")]
+#![doc(html_root_url = "https://docs.rs/rustversion/1.0.22")]
 #![allow(
     clippy::cast_lossless,
     clippy::cast_possible_truncation,