Add relnotes for 1.100 by BoxyUwU · Pull Request #165522 · rust-lang/rust

BoxyUwU · 2026-11-05T19:27:02Z

r? cuviper

cc @rust-lang/release

rustbot · 2026-11-05T19:27:06Z

RELEASES.md was changed. Upon merging, each section will be automatically synced with its corresponding GitHub releases, but only from the main branch.

If it's not already the case, make sure to also merge the changes in the main branch.

BoxyUwU · 2026-11-05T19:28:12Z

@rustbot ping relnotes-interest-group

rustbot · 2026-11-05T19:28:15Z

Hi relnotes-interest-group, this issue/PR could use some help in reviewing /
adjusting release notes. Could you take a look if available? Thanks <3

cc @alex-semenyuk @jieyouxu @joshtriplett @lcnr @traviscross @weihanglo

weihanglo

LGTM for cargo part.

View changes since this review

Co-authored-by: alexey semenyuk <alexsemenyuk88@gmail.com>

Co-authored-by: Kevin Reid <kpreid@switchb.org> Co-authored-by: 许杰友 Jieyou Xu (Joe) <39484203+jieyouxu@users.noreply.github.com> Co-authored-by: Tim (Theemathas) Chirananthavat <theemathas@gmail.com>

cuviper · 2026-11-07T00:19:26Z

+- Introduced Cargo's own linting system: some Cargo warnings are now emitted as lints that users can control in the `[lints.cargo]` table. This includes a new built-in unused dependency check via the `cargo::unused_dependencies` lint. [docs](https://doc.rust-lang.org/nightly/cargo/reference/lints.html) [#17298](https://github.com/rust-lang/cargo/pull/17298)
+- Introduced minimum publish age configurations, also known as dependency cooldowns. When the relevant config is set, the resolver ignores versions published more recently than that, unless they are already in `Cargo.lock`. ([RFC 3923](https://rust-lang.github.io/rfcs/3923-cargo-min-publish-age.html)) [docs](https://doc.rust-lang.org/nightly/cargo/reference/resolver.html#publish-age) [#17335](https://github.com/rust-lang/cargo/pull/17335)
+- cargo-install: now uses the existing lockfile in the `.crate` tarball by default. `--locked` in cargo install becomes a no-op. [#17388](https://github.com/rust-lang/cargo/pull/17388)
+- Cargo now uses a new directory layout for intermediate build artifacts. Tools that inspect the build directory may need to use [Cargo’s JSON messages](https://doc.rust-lang.org/nightly/cargo/reference/external-tools.html#json-messages) to locate build artifacts instead of relying on the build directory layout. The layout is not a stable interface and is subject to change. ([build cache doc](https://doc.rust-lang.org/nightly/cargo/reference/build-cache.html)) [#17354](https://github.com/rust-lang/cargo/pull/17354)


Let's use stable doc links.

Suggested change

- Introduced Cargo's own linting system: some Cargo warnings are now emitted as lints that users can control in the `[lints.cargo]` table. This includes a new built-in unused dependency check via the `cargo::unused_dependencies` lint. [docs](https://doc.rust-lang.org/nightly/cargo/reference/lints.html) [#17298](https://github.com/rust-lang/cargo/pull/17298)

- Introduced minimum publish age configurations, also known as dependency cooldowns. When the relevant config is set, the resolver ignores versions published more recently than that, unless they are already in `Cargo.lock`. ([RFC 3923](https://rust-lang.github.io/rfcs/3923-cargo-min-publish-age.html)) [docs](https://doc.rust-lang.org/nightly/cargo/reference/resolver.html#publish-age) [#17335](https://github.com/rust-lang/cargo/pull/17335)

- cargo-install: now uses the existing lockfile in the `.crate` tarball by default. `--locked` in cargo install becomes a no-op. [#17388](https://github.com/rust-lang/cargo/pull/17388)

- Cargo now uses a new directory layout for intermediate build artifacts. Tools that inspect the build directory may need to use [Cargo’s JSON messages](https://doc.rust-lang.org/nightly/cargo/reference/external-tools.html#json-messages) to locate build artifacts instead of relying on the build directory layout. The layout is not a stable interface and is subject to change. ([build cache doc](https://doc.rust-lang.org/nightly/cargo/reference/build-cache.html)) [#17354](https://github.com/rust-lang/cargo/pull/17354)

- Introduced Cargo's own linting system: some Cargo warnings are now emitted as lints that users can control in the `[lints.cargo]` table. This includes a new built-in unused dependency check via the `cargo::unused_dependencies` lint. [docs](https://doc.rust-lang.org/stable/cargo/reference/lints.html) [#17298](https://github.com/rust-lang/cargo/pull/17298)

- Introduced minimum publish age configurations, also known as dependency cooldowns. When the relevant config is set, the resolver ignores versions published more recently than that, unless they are already in `Cargo.lock`. ([RFC 3923](https://rust-lang.github.io/rfcs/3923-cargo-min-publish-age.html)) [docs](https://doc.rust-lang.org/stable/cargo/reference/resolver.html#publish-age) [#17335](https://github.com/rust-lang/cargo/pull/17335)

- cargo-install: now uses the existing lockfile in the `.crate` tarball by default. `--locked` in cargo install becomes a no-op. [#17388](https://github.com/rust-lang/cargo/pull/17388)

- Cargo now uses a new directory layout for intermediate build artifacts. Tools that inspect the build directory may need to use [Cargo’s JSON messages](https://doc.rust-lang.org/stable/cargo/reference/external-tools.html#json-messages) to locate build artifacts instead of relying on the build directory layout. The layout is not a stable interface and is subject to change. ([build cache doc](https://doc.rust-lang.org/stable/cargo/reference/build-cache.html)) [#17354](https://github.com/rust-lang/cargo/pull/17354)

View changes since the review

cuviper · 2026-11-07T00:19:53Z

+- [`impl<T: Allocator, A: Allocator> Allocator for Box<T, A>`](https://doc.rust-lang.org/stable/std/alloc/trait.Allocator.html#impl-Allocator-for-Box%3CT,+A%3E)
+- [`impl<A: Allocator> Allocator for &mut A`](https://doc.rust-lang.org/stable/std/alloc/trait.Allocator.html#impl-Allocator-for-%26mut+A)
+- [`impl<T: Allocator, A: Allocator> Allocator for Arc<T, A>`](https://doc.rust-lang.org/stable/std/alloc/trait.Allocator.html#impl-Allocator-for-Arc%3CT,+A%3E)
+- [`impl<T: Allocator, A: Allocator> Allocator for Rc<T, A>`](https://doc.rust-lang.org/beta/std/alloc/trait.Allocator.html#impl-Allocator-for-Rc%3CT,+A%3E)


Suggested change

- [`impl<T: Allocator, A: Allocator> Allocator for Rc<T, A>`](https://doc.rust-lang.org/beta/std/alloc/trait.Allocator.html#impl-Allocator-for-Rc%3CT,+A%3E)

- [`impl<T: Allocator, A: Allocator> Allocator for Rc<T, A>`](https://doc.rust-lang.org/stable/std/alloc/trait.Allocator.html#impl-Allocator-for-Rc%3CT,+A%3E)

View changes since the review

cuviper · 2026-11-07T00:20:03Z

+- [`impl<T: Allocator, A: Allocator> Allocator for Rc<T, A>`](https://doc.rust-lang.org/beta/std/alloc/trait.Allocator.html#impl-Allocator-for-Rc%3CT,+A%3E)
+- [`Box::new_in`](https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.new_in)
+- [`Box::from_raw_in`](https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.from_raw_in)
+- [`Box::from_non_null_in`](https://doc.rust-lang.org/beta/std/boxed/struct.Box.html#method.from_non_null_in)


Suggested change

- [`Box::from_non_null_in`](https://doc.rust-lang.org/beta/std/boxed/struct.Box.html#method.from_non_null_in)

- [`Box::from_non_null_in`](https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.from_non_null_in)

View changes since the review

cuviper · 2026-11-07T00:20:19Z

+- [`Child::main_thread_handle`](https://doc.rust-lang.org/stable/std/os/windows/process/trait.ChildExt.html#tymethod.main_thread_handle)
+- [`impl Default for std::sync::Once`](https://doc.rust-lang.org/stable/std/sync/struct.Once.html#impl-Default-for-Once)
+- [`bool::toggle`](https://doc.rust-lang.org/stable/std/primitive.bool.html#method.toggle)
+- [`Box::take`](https://doc.rust-lang.org/beta/std/boxed/struct.Box.html#method.take)


Suggested change

- [`Box::take`](https://doc.rust-lang.org/beta/std/boxed/struct.Box.html#method.take)

- [`Box::take`](https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.take)

View changes since the review

cuviper · 2026-11-07T00:22:50Z

+- [`core::mem::DropGuard`](https://doc.rust-lang.org/stable/core/mem/struct.DropGuard.html)
+- [`std::mem::conjure_zst`](https://doc.rust-lang.org/stable/std/mem/fn.conjure_zst.html)


Let's consistently use core::mem here (or we could go the other way)

Suggested change

- [`core::mem::DropGuard`](https://doc.rust-lang.org/stable/core/mem/struct.DropGuard.html)

- [`std::mem::conjure_zst`](https://doc.rust-lang.org/stable/std/mem/fn.conjure_zst.html)

- [`core::mem::DropGuard`](https://doc.rust-lang.org/stable/core/mem/struct.DropGuard.html)

- [`core::mem::conjure_zst`](https://doc.rust-lang.org/stable/core/mem/fn.conjure_zst.html)

View changes since the review

Add relnotes 1.100

12752e1

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-release Relevant to the release subteam, which will review and decide on the PR/issue. labels Nov 5, 2026

rustbot assigned cuviper Nov 5, 2026

BoxyUwU mentioned this pull request Nov 5, 2026

Draft release notes for 1.100.0 #163811

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BoxyUwU commented Nov 5, 2026

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alex-semenyuk reviewed Nov 6, 2026

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BoxyUwU and others added 3 commits November 6, 2026 11:10

Update RELEASES.md

7721426

Co-authored-by: alexey semenyuk <alexsemenyuk88@gmail.com>

Apply batched suggestions from code review

d2eddb5

Co-authored-by: Kevin Reid <kpreid@switchb.org> Co-authored-by: 许杰友 Jieyou Xu (Joe) <39484203+jieyouxu@users.noreply.github.com> Co-authored-by: Tim (Theemathas) Chirananthavat <theemathas@gmail.com>

nits

748fcf2

tshepang mentioned this pull request Nov 6, 2026

update Rust 1.100 changelog rust-lang/fls#739

Open

cuviper reviewed Nov 7, 2026

View reviewed changes

	- [`impl<T: Allocator, A: Allocator> Allocator for Rc<T, A>`](https://doc.rust-lang.org/beta/std/alloc/trait.Allocator.html#impl-Allocator-for-Rc%3CT,+A%3E)
	- [`impl<T: Allocator, A: Allocator> Allocator for Rc<T, A>`](https://doc.rust-lang.org/stable/std/alloc/trait.Allocator.html#impl-Allocator-for-Rc%3CT,+A%3E)

	- [`Box::from_non_null_in`](https://doc.rust-lang.org/beta/std/boxed/struct.Box.html#method.from_non_null_in)
	- [`Box::from_non_null_in`](https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.from_non_null_in)

	- [`Box::take`](https://doc.rust-lang.org/beta/std/boxed/struct.Box.html#method.take)
	- [`Box::take`](https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.take)

		- [`core::mem::DropGuard`](https://doc.rust-lang.org/stable/core/mem/struct.DropGuard.html)
		- [`std::mem::conjure_zst`](https://doc.rust-lang.org/stable/std/mem/fn.conjure_zst.html)

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