Assorted allocator nitpicks by nia-e · Pull Request #161115 · rust-lang/rust

nia-e · 2026-08-14T23:22:13Z

Small things that got missed in #157428, doc language cleanup for allocator, and a rename that closes #158344. cc @rust-lang/wg-allocators. pending libs bikeshed decision on the naming of into_raw_parts_with_alloc

r? clarfonthey

clarfonthey · 2026-08-14T23:45:04Z

r=me minus const bound note. (either remove unused const bound on both, or constify both)

clarfonthey · 2026-08-14T23:54:29Z

New changes look good too, but will hold merge in case you have anything else to add. (r=me)

bushrat011899

One very minor nit, otherwise looks good to me!

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nia-e · 2026-08-18T18:27:45Z

@bors r=clarfonthey rollup

rust-bors · 2026-08-18T18:27:48Z

📌 Commit be759d2 has been approved by clarfonthey

It is now in the queue for this repository.

nia-e · 2026-08-18T18:40:53Z

forgot to squash, oopers

@bors r-

rust-bors · 2026-08-18T18:40:58Z

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nia-e · 2026-08-18T18:41:12Z

@bors squash

rust-bors · 2026-08-18T18:41:15Z

🚧 Squashing... this can take a few minutes.

rust-bors · 2026-08-18T18:42:16Z

❗ Failed to push the squashed commit to nia-e/rust:allocator-nitpicks: Push timeouted

maxdexh · 2026-08-18T18:50:08Z

I can see someone wants to get this merged 😂

nia-e · 2026-08-18T18:51:44Z

i also added the AllocatorClone bound to the conversion from Box to {Ar,R}c (mostly to prevent anyone from doing it on stable w/ a custom allocator, even though it's sound without since we gate Clone for {Ar,R}c)

maxdexh · 2026-08-18T18:57:44Z

Probably don't do that, you can write that downstream for Box<LocalType, MyAlloc>. (although i guess only for Rc<T, Global>?)

nia-e · 2026-08-18T19:00:17Z

yep. though im okay keeping it so you can create an Rc with a custom allocator since it wouldn't be clonable

maxdexh · 2026-08-18T19:02:28Z

I don't think you can call that impl for allocators other than global? I'll do more testing around fundamental in general before stabilization because I feel like there's some weird stuff here

nia-e · 2026-08-18T19:04:56Z

we want to eventually offer From<Box<T, A: Allocator>> for Rc<T, A>. i guess the right call here is to just stabilise that and it's fine bc you can never clone that rc. i'll just change it back to that

maxdexh · 2026-08-18T19:07:23Z

If you can call that, that's already problematic because we also want to change the Send and Sync impl on Arc

maxdexh · 2026-08-18T19:09:01Z

~~There will have to be another PR with API stuff anyway, since some of the impls need to be generalized so that users don't write them themselves.~~ maybe not

nia-e · 2026-08-18T19:47:24Z

ready on my end, feel free to r+ this once you've reviewed clar ^

clarfonthey · 2026-08-18T19:48:57Z

@bors r+ rollup

Looked through all remaining comments, everything looks to be resolved.

rust-bors · 2026-08-18T19:49:05Z

📌 Commit 7d40fdb has been approved by clarfonthey

It is now in the queue for this repository.

…nthey Assorted allocator nitpicks Small things that got missed in rust-lang#157428, doc language cleanup for allocator, and a rename that closes rust-lang#158344. cc @rust-lang/wg-allocators. pending libs bikeshed decision on the naming of `into_raw_parts_with_alloc` r? clarfonthey

Rollup of 18 pull requests Successful merges: - #154210 (fix: fix the capture behavior of `if let` in closures) - #156176 (Initial implementation of `FnPtr` trait) - #160767 (Unify E0117 foreign-trait label for ADT/primitive types with existing Slice/Array/Tuple handling) - #161297 (std: use UNIX's `Instant` and `SystemTime` on Hermit) - #160489 (Adding diagnostic item markers for multiple fs functions and structs) - #160643 (Require windowed (and exception) for Xtensa ABI) - #161088 (suppress projection errors already covered by a trait error) - #161114 (Remove fields from TypeKind: Struct, Enum, Union and Tuple) - #161115 (Assorted allocator nitpicks) - #161220 (bootstrap: Allow `./x fix --allow-dirty`) - #161296 (Enable overflow checks in `rustc_thread_pool`) - #161298 (remove rustc_error_messages dependency) - #161304 (Rename test so it matches the issue) - #161309 (`allow(non_camel_case_types)` in `minicore.rs`) - #161315 (Relax codgen test variable regex) - #161318 (Doc: clarify how `Read::bytes` handling Interrupted errors) - #161321 (Update books) - #161335 ([compiletest] Use the correct rustc lib directory for query_rustc_output)

Rollup merge of #161115 - nia-e:allocator-nitpicks, r=clarfonthey Assorted allocator nitpicks Small things that got missed in #157428, doc language cleanup for allocator, and a rename that closes #158344. cc @rust-lang/wg-allocators. pending libs bikeshed decision on the naming of `into_raw_parts_with_alloc` r? clarfonthey

Rollup of 18 pull requests Successful merges: - rust-lang/rust#154210 (fix: fix the capture behavior of `if let` in closures) - rust-lang/rust#156176 (Initial implementation of `FnPtr` trait) - rust-lang/rust#160767 (Unify E0117 foreign-trait label for ADT/primitive types with existing Slice/Array/Tuple handling) - rust-lang/rust#161297 (std: use UNIX's `Instant` and `SystemTime` on Hermit) - rust-lang/rust#160489 (Adding diagnostic item markers for multiple fs functions and structs) - rust-lang/rust#160643 (Require windowed (and exception) for Xtensa ABI) - rust-lang/rust#161088 (suppress projection errors already covered by a trait error) - rust-lang/rust#161114 (Remove fields from TypeKind: Struct, Enum, Union and Tuple) - rust-lang/rust#161115 (Assorted allocator nitpicks) - rust-lang/rust#161220 (bootstrap: Allow `./x fix --allow-dirty`) - rust-lang/rust#161296 (Enable overflow checks in `rustc_thread_pool`) - rust-lang/rust#161298 (remove rustc_error_messages dependency) - rust-lang/rust#161304 (Rename test so it matches the issue) - rust-lang/rust#161309 (`allow(non_camel_case_types)` in `minicore.rs`) - rust-lang/rust#161315 (Relax codgen test variable regex) - rust-lang/rust#161318 (Doc: clarify how `Read::bytes` handling Interrupted errors) - rust-lang/rust#161321 (Update books) - rust-lang/rust#161335 ([compiletest] Use the correct rustc lib directory for query_rustc_output)

rustbot assigned clarfonthey Aug 14, 2026

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nia-e commented Aug 14, 2026

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nia-e commented Aug 15, 2026

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theemathas reviewed Aug 15, 2026

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N1ark reviewed Aug 15, 2026

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maxdexh reviewed Aug 16, 2026

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maxdexh reviewed Aug 16, 2026

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bushrat011899 approved these changes Aug 17, 2026

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juntyr reviewed Aug 18, 2026

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nia-e mentioned this pull request Aug 18, 2026

alloc: stabilise Allocator #156882

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okay max sure

c132f36

undo rc and arc thing

2ee54ff

nia-e added 2 commits August 18, 2026 21:16

tighten send so bad rc can't be used

4f2bbfd

this too

31d172e

clarfonthey reviewed Aug 18, 2026

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there u go

7d40fdb

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JonathanBrouwer mentioned this pull request Aug 18, 2026

Rollup of 13 pull requests #161322

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This was referenced Aug 19, 2026

Rollup of 19 pull requests #161337

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Rollup of 18 pull requests #161338

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rust-bors Bot merged commit 63f0cfc into rust-lang:main Aug 19, 2026
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rustbot added this to the 1.100.0 milestone Aug 19, 2026

nia-e mentioned this pull request Aug 19, 2026

vec: fixup the name that i forgot #161360

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