chore(deps): Update Rust Stable to v1.86 (#59)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [STABLE](https://redirect.github.com/rust-lang/rust) | minor | `1.85`
-> `1.86` |

---

### Release Notes

<details>
<summary>rust-lang/rust (STABLE)</summary>

###
[`v1.86`](https://redirect.github.com/rust-lang/rust/blob/HEAD/RELEASES.md#Version-1860-2025-04-03)

[Compare
Source](https://redirect.github.com/rust-lang/rust/compare/1.85.0...1.86.0)

\==========================

<a id="1.86.0-Language"></a>

## Language

- [Stabilize upcasting trait objects to
supertraits.](https://redirect.github.com/rust-lang/rust/pull/134367)
- [Allow safe functions to be marked with the `#[target_feature]`
attribute.](https://redirect.github.com/rust-lang/rust/pull/134090)
- [The `missing_abi` lint now
warns-by-default.](https://redirect.github.com/rust-lang/rust/pull/132397)
- Rust now lints about double negations, to catch cases that might have
intended to be a prefix decrement operator (`--x`) as written in other
languages. This was previously a clippy lint, `clippy::double_neg`, and
is [now available directly in Rust as
`double_negations`.](https://redirect.github.com/rust-lang/rust/pull/126604)
- [More pointers are now detected as definitely not-null based on their
alignment in const
eval.](https://redirect.github.com/rust-lang/rust/pull/133700)
- [Empty `repr()` attribute applied to invalid items are now correctly
rejected.](https://redirect.github.com/rust-lang/rust/pull/133925)
- [Inner attributes `#![test]` and `#![rustfmt::skip]` are no longer
accepted in more places than
intended.](https://redirect.github.com/rust-lang/rust/pull/134276)

<a id="1.86.0-Compiler"></a>

## Compiler

- [Debug-assert that raw pointers are non-null on
access.](https://redirect.github.com/rust-lang/rust/pull/134424)
- [Change `-O` to mean `-C opt-level=3` instead of `-C opt-level=2` to
match Cargo's
defaults.](https://redirect.github.com/rust-lang/rust/pull/135439)
- [Fix emission of `overflowing_literals` under certain macro
environments.](https://redirect.github.com/rust-lang/rust/pull/136393)

<a id="1.86.0-Platform-Support"></a>

## Platform Support

- [Replace `i686-unknown-redox` target with
`i586-unknown-redox`.](https://redirect.github.com/rust-lang/rust/pull/136698)
- [Increase baseline CPU of `i686-unknown-hurd-gnu` to Pentium
4.](https://redirect.github.com/rust-lang/rust/pull/136700)
-   New tier 3 targets:
-
[`{aarch64-unknown,x86_64-pc}-nto-qnx710_iosock`](https://redirect.github.com/rust-lang/rust/pull/133631).
        For supporting Neutrino QNX 7.1 with `io-socket` network stack.
-
[`{aarch64-unknown,x86_64-pc}-nto-qnx800`](https://redirect.github.com/rust-lang/rust/pull/133631).
        For supporting Neutrino QNX 8.0 (`no_std`-only).
-
[`{x86_64,i686}-win7-windows-gnu`](https://redirect.github.com/rust-lang/rust/pull/134609).
Intended for backwards compatibility with Windows 7.
`{x86_64,i686}-win7-windows-msvc` are the Windows MSVC counterparts that
already exist as Tier 3 targets.
-
[`amdgcn-amd-amdhsa`](https://redirect.github.com/rust-lang/rust/pull/134740).
-
[`x86_64-pc-cygwin`](https://redirect.github.com/rust-lang/rust/pull/134999).
-
[`{mips,mipsel}-mti-none-elf`](https://redirect.github.com/rust-lang/rust/pull/135074).
        Initial bare-metal support.
-
[`m68k-unknown-none-elf`](https://redirect.github.com/rust-lang/rust/pull/135085).
- [`armv7a-nuttx-{eabi,eabihf}`, `aarch64-unknown-nuttx`, and
`thumbv7a-nuttx-{eabi,eabihf}`](https://redirect.github.com/rust-lang/rust/pull/135757).

Refer to Rust's \[platform support page]\[platform-support-doc]
for more information on Rust's tiered platform support.

<a id="1.86.0-Libraries"></a>

## Libraries

- The type of `FromBytesWithNulError` in
`CStr::from_bytes_with_nul(bytes: &[u8]) -> Result<&Self,
FromBytesWithNulError>` was [changed from an opaque struct to an
enum](https://redirect.github.com/rust-lang/rust/pull/134143), allowing
users to examine why the conversion failed.
- [Remove `RustcDecodable` and
`RustcEncodable`.](https://redirect.github.com/rust-lang/rust/pull/134272)
- [Deprecate libtest's `--logfile`
option.](https://redirect.github.com/rust-lang/rust/pull/134283)
- [On recent versions of Windows, `std::fs::remove_file` will now remove
read-only
files.](https://redirect.github.com/rust-lang/rust/pull/134679)

<a id="1.86.0-Stabilized-APIs"></a>

## Stabilized APIs

-
[`{float}::next_down`](https://doc.rust-lang.org/stable/std/primitive.f64.html#method.next_down)
-
[`{float}::next_up`](https://doc.rust-lang.org/stable/std/primitive.f64.html#method.next_up)
-
[`<[_]>::get_disjoint_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.get_disjoint_mut)
-
[`<[_]>::get_disjoint_unchecked_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.get_disjoint_unchecked_mut)
-
[`slice::GetDisjointMutError`](https://doc.rust-lang.org/stable/std/slice/enum.GetDisjointMutError.html)
-
[`HashMap::get_disjoint_mut`](https://doc.rust-lang.org/std/collections/hash_map/struct.HashMap.html#method.get_disjoint_mut)
-
[`HashMap::get_disjoint_unchecked_mut`](https://doc.rust-lang.org/std/collections/hash_map/struct.HashMap.html#method.get_disjoint_unchecked_mut)
-
[`NonZero::count_ones`](https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.count_ones)
-
[`Vec::pop_if`](https://doc.rust-lang.org/std/vec/struct.Vec.html#method.pop_if)
-
[`sync::Once::wait`](https://doc.rust-lang.org/stable/std/sync/struct.Once.html#method.wait)
-
[`sync::Once::wait_force`](https://doc.rust-lang.org/stable/std/sync/struct.Once.html#method.wait_force)
-
[`sync::OnceLock::wait`](https://doc.rust-lang.org/stable/std/sync/struct.OnceLock.html#method.wait)

These APIs are now stable in const contexts:

-
[`hint::black_box`](https://doc.rust-lang.org/stable/std/hint/fn.black_box.html)
-
[`io::Cursor::get_mut`](https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.get_mut)
-
[`io::Cursor::set_position`](https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.set_position)
-
[`str::is_char_boundary`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.is_char_boundary)
-
[`str::split_at`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at)
-
[`str::split_at_checked`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at_checked)
-
[`str::split_at_mut`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at_mut)
-
[`str::split_at_mut_checked`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at_mut_checked)

<a id="1.86.0-Cargo"></a>

## Cargo

- [When merging, replace rather than combine configuration keys that
refer to a program path and its
arguments.](https://redirect.github.com/rust-lang/cargo/pull/15066/)
- [Error if both `--package` and `--workspace` are passed but the
requested package is
missing.](https://redirect.github.com/rust-lang/cargo/pull/15071/) This
was previously silently ignored, which was considered a bug since
missing packages should be reported.
- [Deprecate the token argument in `cargo login` to avoid shell history
leaks.](https://redirect.github.com/rust-lang/cargo/pull/15057/)
- [Simplify the implementation of `SourceID`
comparisons.](https://redirect.github.com/rust-lang/cargo/pull/14980/)
This may potentially change behavior if the canonicalized URL compares
differently in alternative registries.

<a id="1.86.0-Rustdoc"></a>

## Rustdoc

- [Add a sans-serif font
setting.](https://redirect.github.com/rust-lang/rust/pull/133636)

<a id="1.86.0-Compatibility-Notes"></a>

## Compatibility Notes

- [The `wasm_c_abi` future compatibility warning is now a hard
error.](https://redirect.github.com/rust-lang/rust/pull/133951)
Users of `wasm-bindgen` should upgrade to at least version 0.2.89,
otherwise compilation will fail.
- [Remove long-deprecated no-op attributes `#![no_start]` and
`#![crate_id]`.](https://redirect.github.com/rust-lang/rust/pull/134300)
- [The future incompatibility lint `cenum_impl_drop_cast` has been made
into a hard
error.](https://redirect.github.com/rust-lang/rust/pull/135964) This
means it is now an error to cast a field-less enum to an integer if the
enum implements `Drop`.
- [SSE2 is now required for "i686" 32-bit x86 hard-float targets;
disabling it causes a warning that will become a hard error
eventually.](https://redirect.github.com/rust-lang/rust/pull/137037)
    To compile for pre-SSE2 32-bit x86, use a "i586" target instead.

<a id="1.86.0-Internal-Changes"></a>

## Internal Changes

These changes do not affect any public interfaces of Rust, but they
represent
significant improvements to the performance or internals of rustc and
related
tools.

- [Build the rustc on AArch64 Linux with ThinLTO +
PGO.](https://redirect.github.com/rust-lang/rust/pull/133807)
The ARM 64-bit compiler (AArch64) on Linux is now optimized with ThinLTO
and PGO, similar to the optimizations we have already performed for the
x86-64 compiler on Linux. This should make it up to 30% faster.

</details>

---

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Diff for: .github/workflows/ci.yml

@@ -106,7 +106,7 @@ jobs:
     - name: Install Rust
       uses: dtolnay/rust-toolchain@stable
       with:
-        toolchain: "1.85"  # STABLE
+        toolchain: "1.86"  # STABLE
     - uses: Swatinem/rust-cache@v2
     - name: Check documentation
       env:
@@ -121,7 +121,7 @@ jobs:
     - name: Install Rust
       uses: dtolnay/rust-toolchain@stable
       with:
-        toolchain: "1.85"  # STABLE
+        toolchain: "1.86"  # STABLE
         components: rustfmt
     - uses: Swatinem/rust-cache@v2
     - name: Check formatting
@@ -137,7 +137,7 @@ jobs:
     - name: Install Rust
       uses: dtolnay/rust-toolchain@stable
       with:
-        toolchain: "1.85"  # STABLE
+        toolchain: "1.86"  # STABLE
         components: clippy
     - uses: Swatinem/rust-cache@v2
     - name: Install SARIF tools