Merge subtree update for toolchain nightly-2025-07-02 (#407)

This is an automated PR to merge library subtree updates from 2025-06-17
(rust-lang/rust@45acf54) to 2025-07-02
(rust-lang/rust@71e4c00) (inclusive)
into main. `git merge` resulted in conflicts, which require manual
resolution. Files were commited with merge conflict markers. **Do not
remove or edit the following annotations:**
git-subtree-dir: library
git-subtree-split: 46c01c8

---------

Signed-off-by: xizheyin <xizheyin@smail.nju.edu.cn>
Co-authored-by: Trevor Gross <tmgross@umich.edu>
Co-authored-by: Folkert de Vries <folkert@folkertdev.nl>
Co-authored-by: León Orell Valerian Liehr <me@fmease.dev>
Co-authored-by: Gray Olson <gray@grayolson.com>
Co-authored-by: Pascal S. de Kloe <pascal@quies.net>
Co-authored-by: David Carlier <devnexen@gmail.com>
Co-authored-by: bors <bors@rust-lang.org>
Co-authored-by: Shun Sakai <sorairolake@protonmail.ch>
Co-authored-by: Deven T. Corzine <deven@ties.org>
Co-authored-by: Amanieu d'Antras <amanieu@gmail.com>
Co-authored-by: Boxy <rust@boxyuwu.dev>
Co-authored-by: Mara Bos <m-ou.se@m-ou.se>
Co-authored-by: github-actions <github-actions@github.com>
Co-authored-by: Jeremy Smart <jeremy3141592@gmail.com>
Co-authored-by: Urgau <urgau@numericable.fr>
Co-authored-by: Jakub Beránek <berykubik@gmail.com>
Co-authored-by: xizheyin <xizheyin@smail.nju.edu.cn>
Co-authored-by: Ralf Jung <post@ralfj.de>
Co-authored-by: Tamir Duberstein <tamird@gmail.com>
Co-authored-by: Matthias Krüger <476013+matthiaskrgr@users.noreply.github.com>
Co-authored-by: mejrs <59372212+mejrs@users.noreply.github.com>
Co-authored-by: qinghon <wushengshijie@outlook.com>
Co-authored-by: Chris Denton <chris@chrisdenton.dev>
Co-authored-by: Sasha Pourcelot <sasha.pourcelot@protonmail.com>
Co-authored-by: Soveu <marx.tomasz@gmail.com>
Co-authored-by: David Tolnay <dtolnay@gmail.com>
Co-authored-by: Jubilee <workingjubilee@gmail.com>
Co-authored-by: Mu001999 <mu001999@outlook.com>
Co-authored-by: bjorn3 <17426603+bjorn3@users.noreply.github.com>
Co-authored-by: sayantn <sayantn05@gmail.com>
Co-authored-by: Christopher Berner <me@cberner.com>
Co-authored-by: Markus Reiter <me@reitermark.us>
Co-authored-by: The 8472 <git@infinite-source.de>
Co-authored-by: 王宇逸 <Strawberry_Str@hotmail.com>
Co-authored-by: Marijn Schouten <mhkbst@gmail.com>
Co-authored-by: Michał Łowicki <mlowicki@gmail.com>
Co-authored-by: Yotam Ofek <yotam.ofek@gmail.com>
Co-authored-by: Guillaume Gomez <guillaume1.gomez@gmail.com>
Co-authored-by: David Wood <david.wood2@arm.com>
Co-authored-by: Neal <nealsid@users.noreply.github.com>
Co-authored-by: Tomoaki Kobayashi <tomoaki.kobayashi.t3@alumni.tohoku.ac.jp>
Co-authored-by: Daniel Paoliello <danpao@microsoft.com>
Co-authored-by: Marijn Schouten <hkBst@users.noreply.github.com>
Co-authored-by: Benoît du Garreau <benoit@dugarreau.fr>
Co-authored-by: Aniket Mishra <143333884+satiscugcat@users.noreply.github.com>
Co-authored-by: satiscugcat <23110026@iitgn.ac.in>
Co-authored-by: Jacob Pratt <jacob@jhpratt.dev>
Co-authored-by: Urgau <3616612+Urgau@users.noreply.github.com>
Co-authored-by: Zachary S <zasample18+github@gmail.com>
Co-authored-by: Trevor Gross <t.gross35@gmail.com>
Co-authored-by: Tim (Theemathas) Chirananthavat <theemathas@gmail.com>
Co-authored-by: Alice Ryhl <aliceryhl@google.com>
Co-authored-by: Kornel <kornel@geekhood.net>
Co-authored-by: Daniel Bloom <7810950-Daniel.Aaron.Bloom@users.noreply.gitlab.com>
Co-authored-by: Ed Page <eopage@gmail.com>
Co-authored-by: The Miri Cronjob Bot <miri@cron.bot>
Co-authored-by: Chai T. Rex <ChaiTRex@users.noreply.github.com>
Co-authored-by: Valdemar Erk <valdemar@erk.dev>
Co-authored-by: Samuel Tardieu <sam@rfc1149.net>
Co-authored-by: binarycat <binarycat@envs.net>
Co-authored-by: Tshepang Mbambo <hopsi@tuta.io>
Co-authored-by: Laine Taffin Altman <alexanderaltman@me.com>
Co-authored-by: Oli Scherer <github333195615777966@oli-obk.de>
Co-authored-by: MetaNova <adam.magnum@gmail.com>
Co-authored-by: Kurt Heiritz (pseudo) <saarthkarkera@gmail.com>
Co-authored-by: krikera <prafulrai522@gmail.com>
Co-authored-by: Pavel Grigorenko <GrigorenkoPV@ya.ru>
Co-authored-by: Michael Goulet <michael@errs.io>
Co-authored-by: Bastian Kersting <bkersting@google.com>
Co-authored-by: Deadbeef <ent3rm4n@gmail.com>
Co-authored-by: Cheng Xu <git@xuc.me>
Co-authored-by: наб <nabijaczleweli@nabijaczleweli.xyz>
Co-authored-by: kilavvy <140459108+kilavvy@users.noreply.github.com>
Co-authored-by: zachs18 <8355914+zachs18@users.noreply.github.com>
Co-authored-by: dianqk <dianqk@dianqk.net>
Co-authored-by: gitbot <git@bot>
Co-authored-by: Michael Tautschnig <tautschn@amazon.com>

Author: 73 people

.github/workflows/goto-transcoder.yml

@@ -27,8 +27,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: true
-      - name: Apply stdarch patch
-        run: cd library/stdarch && patch -p1 < ../../stdarch.patch
 
       # Step 2: Generate contracts programs
       - name: Generate contracts

.github/workflows/kani-metrics.yml

@@ -25,9 +25,7 @@ jobs:
       uses: actions/checkout@v4
       with:
         submodules: true
-    - name: Apply stdarch patch
-      run: cd library/stdarch && patch -p1 < ../../stdarch.patch
-
+    
     # The Kani metrics collection uses a Python script (kani_std_analysis.py), so make sure Python is installed
     - name: Set up Python
       uses: actions/setup-python@v4

.github/workflows/kani.yml

@@ -51,9 +51,7 @@ jobs:
         with:
           path: head
           submodules: true
-      - name: Apply stdarch patch
-        run: cd head/library/stdarch && patch -p1 < ../../stdarch.patch
-
+      
       # Step 2: Install jq
       - name: Install jq
         if: matrix.os == 'ubuntu-latest'
@@ -90,8 +88,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: true
-      - name: Apply stdarch patch
-        run: cd library/stdarch && patch -p1 < ../../stdarch.patch
 
       # Step 2: Run Kani autoharness on the std library for selected functions.
       # Uses "--include-pattern" to make sure we do not try to run across all
@@ -102,8 +98,6 @@ jobs:
       # - We use >::disjoint_bitor (and >::unchecked_disjoint_bitor) as pattern
       #   as whitespace is not supported, cf.
       #   https://github.com/model-checking/kani/issues/4046
-      # - core_arch::x86::__m128d::as_f64x2 is just one example of hundreds of
-      #   core_arch::x86:: functions that are known to verify successfully.
       - name: Run Kani Verification
         run: |
           scripts/run-kani.sh --run autoharness --kani-args \
@@ -113,7 +107,6 @@ jobs:
             --include-pattern alloc::layout::Layout::from_size_align \
             --include-pattern ascii::ascii_char::AsciiChar::from_u8 \
             --include-pattern char::convert::from_u32_unchecked \
-            --include-pattern core_arch::x86::__m128d::as_f64x2 \
             --include-pattern "num::nonzero::NonZero::<i8>::count_ones" \
             --include-pattern "num::nonzero::NonZero::<i16>::count_ones" \
             --include-pattern "num::nonzero::NonZero::<i32>::count_ones" \
@@ -295,8 +288,6 @@ jobs:
         with:
           path: head
           submodules: true
-      - name: Apply stdarch patch
-        run: cd head/library/stdarch && patch -p1 < ../../stdarch.patch
 
       # Step 2: Run list on the std library
       - name: Run Kani List
@@ -329,8 +320,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: true
-      - name: Apply stdarch patch
-        run: cd library/stdarch && patch -p1 < ../../stdarch.patch
 
       # Step 2: Run autoharness analyzer on the std library
       - name: Run Autoharness Analyzer

library/Cargo.lock

@@ -1,3 +1,5 @@
+cargo-features = ["profile-rustflags"]
+
 [workspace]
 resolver = "1"
 members = [
@@ -44,9 +46,16 @@ object.debug = 0
 rustc-demangle.debug = 0
 rustc-demangle.opt-level = "s"
 
+# panic_abort must always be compiled with panic=abort, even when the rest of the
+# sysroot is panic=unwind.
+[profile.dev.package.panic_abort]
+rustflags = ["-Cpanic=abort"]
+
+[profile.release.package.panic_abort]
+rustflags = ["-Cpanic=abort"]
+
 [patch.crates-io]
-# See comments in `library/rustc-std-workspace-core/README.md` for what's going on
-# here
+# See comments in `library/rustc-std-workspace-core/README.md` for what's going on here
 rustc-std-workspace-core = { path = 'rustc-std-workspace-core' }
 rustc-std-workspace-alloc = { path = 'rustc-std-workspace-alloc' }
 rustc-std-workspace-std = { path = 'rustc-std-workspace-std' }

library/Cargo.toml

@@ -31,8 +31,9 @@ unsafe extern "Rust" {
     #[rustc_std_internal_symbol]
     fn __rust_alloc_zeroed(size: usize, align: usize) -> *mut u8;
 
+    #[rustc_nounwind]
     #[rustc_std_internal_symbol]
-    static __rust_no_alloc_shim_is_unstable: u8;
+    fn __rust_no_alloc_shim_is_unstable_v2();
 }
 
 /// The global memory allocator.
@@ -88,7 +89,7 @@ pub unsafe fn alloc(layout: Layout) -> *mut u8 {
     unsafe {
         // Make sure we don't accidentally allow omitting the allocator shim in
         // stable code until it is actually stabilized.
-        core::ptr::read_volatile(&__rust_no_alloc_shim_is_unstable);
+        __rust_no_alloc_shim_is_unstable_v2();
 
         __rust_alloc(layout.size(), layout.align())
     }
@@ -171,7 +172,7 @@ pub unsafe fn alloc_zeroed(layout: Layout) -> *mut u8 {
     unsafe {
         // Make sure we don't accidentally allow omitting the allocator shim in
         // stable code until it is actually stabilized.
-        core::ptr::read_volatile(&__rust_no_alloc_shim_is_unstable);
+        __rust_no_alloc_shim_is_unstable_v2();
 
         __rust_alloc_zeroed(layout.size(), layout.align())
     }

library/alloc/src/alloc.rs

@@ -1517,9 +1517,7 @@ impl<T: Ord, const N: usize> From<[T; N]> for BTreeSet<T> {
 
         // use stable sort to preserve the insertion order.
         arr.sort();
-        let iter = IntoIterator::into_iter(arr).map(|k| (k, SetValZST::default()));
-        let map = BTreeMap::bulk_build_from_sorted_iter(iter, Global);
-        BTreeSet { map }
+        BTreeSet::from_sorted_iter(IntoIterator::into_iter(arr), Global)
     }
 }