Update subtree to 2025-02-11 (#259)

**Do not merge this PR** -- it is just meant for reviews and a CI check,
and then we'll push to main directly instead.

Some callouts:

- The changes to `const_ptr`, `mut_ptr`, and `nonnull` are necessary
because model-checking/kani#3755 introduced a
Kani model for `offset`, which expanded the range of UB that Kani can
catch. It also introduced these failures under the "safety check" label,
which is not affected by `#{should_panic]`. These updates exposed issues
with the existing contracts and proofs (most notably for ZSTs) which are
fixed here.
- A few of the proofs are still failing because of bug(s) in Kani's
function contracts. See
model-checking/kani#3905 for a tracking issue.
For now, they're commented out with a FIXME tag.

Note that the VeriFast failures are expected, since part of its CI job
checks if its proofs are up-to-date with the most recent version of the
library, and the subtree update makes it so that's not the case.

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 and MIT licenses.

---------

Co-authored-by: gitbot <git@bot>

Author: Carolyn Zech

library/Cargo.lock

@@ -3,6 +3,7 @@ resolver = "1"
 members = [
   "std",
   "sysroot",
+  "coretests",
 ]
 
 exclude = [
@@ -32,7 +33,7 @@ codegen-units = 10000
 [profile.release.package]
 addr2line.debug = 0
 addr2line.opt-level = "s"
-adler.debug = 0
+adler2.debug = 0
 gimli.debug = 0
 gimli.opt-level = "s"
 miniz_oxide.debug = 0

library/Cargo.toml

@@ -10,7 +10,7 @@ edition = "2021"
 
 [dependencies]
 core = { path = "../core" }
-compiler_builtins = { version = "=0.1.138", features = ['rustc-dep-of-std'] }
+compiler_builtins = { version = "=0.1.145", features = ['rustc-dep-of-std'] }
 safety = { path = "../contracts/safety" }
 
 [dev-dependencies]

library/alloc/Cargo.toml

@@ -353,6 +353,7 @@ pub fn iter_10k(b: &mut Bencher) {
 }
 
 #[bench]
+#[cfg_attr(target_os = "emscripten", ignore)] // hits an OOM
 pub fn iter_1m(b: &mut Bencher) {
     bench_iter(b, 1_000, 1_000_000);
 }

library/alloc/benches/btree/map.rs

@@ -4,8 +4,7 @@
 #![feature(iter_next_chunk)]
 #![feature(repr_simd)]
 #![feature(slice_partition_dedup)]
-#![cfg_attr(bootstrap, feature(strict_provenance))]
-#![cfg_attr(not(bootstrap), feature(strict_provenance_lints))]
+#![feature(strict_provenance_lints)]
 #![feature(test)]
 #![deny(fuzzy_provenance_casts)]
 

library/alloc/benches/lib.rs

@@ -366,14 +366,25 @@ rotate!(rotate_medium_half, gen_random, 9158, 9158 / 2);
 rotate!(rotate_medium_half_plus_one, gen_random, 9158, 9158 / 2 + 1);
 
 // Intended to use more RAM than the machine has cache
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by1, gen_random, 5 * 1024 * 1024, 1);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by9199_u64, gen_random, 5 * 1024 * 1024, 9199);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by9199_bytes, gen_random_bytes, 5 * 1024 * 1024, 9199);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by9199_strings, gen_strings, 5 * 1024 * 1024, 9199);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by9199_big, gen_big_random, 5 * 1024 * 1024, 9199);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by1234577_u64, gen_random, 5 * 1024 * 1024, 1234577);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by1234577_bytes, gen_random_bytes, 5 * 1024 * 1024, 1234577);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by1234577_strings, gen_strings, 5 * 1024 * 1024, 1234577);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by1234577_big, gen_big_random, 5 * 1024 * 1024, 1234577);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_half, gen_random, 5 * 1024 * 1024, 5 * 1024 * 1024 / 2);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_half_plus_one, gen_random, 5 * 1024 * 1024, 5 * 1024 * 1024 / 2 + 1);

library/alloc/benches/slice.rs

@@ -547,6 +547,11 @@ fn bench_in_place_collect_droppable(b: &mut Bencher) {
     })
 }
 
+// node.js gives out of memory error to use with length 1_100_000
+#[cfg(target_os = "emscripten")]
+const LEN: usize = 4096;
+
+#[cfg(not(target_os = "emscripten"))]
 const LEN: usize = 16384;
 
 #[bench]

library/alloc/benches/vec.rs

@@ -10,9 +10,6 @@ use core::hint;
 #[cfg(not(test))]
 use core::ptr::{self, NonNull};
 
-#[cfg(test)]
-mod tests;
-
 extern "Rust" {
     // These are the magic symbols to call the global allocator. rustc generates
     // them to call `__rg_alloc` etc. if there is a `#[global_allocator]` attribute
@@ -342,7 +339,7 @@ unsafe impl Allocator for Global {
     }
 }
 
-/// The allocator for unique pointers.
+/// The allocator for `Box`.
 #[cfg(all(not(no_global_oom_handling), not(test)))]
 #[lang = "exchange_malloc"]
 #[inline]