---
# System prepended metadata

title: Libs-API Meeting 2021-08-04
tags: [Minutes, Libs Meetings]

---

# Libs-API Meeting 2021-08-04

###### tags: `Libs Meetings` `Minutes`

**Meeting Link**: https://meet.jit.si/rust-libs-meeting-crxoz2at8hiccp7b3ixf89qgxfymlbwr
**Attendees**: Amanieu, David, Josh Triplett, Jane, Mara, bstrie

## Agenda

- [Open action items](https://hackmd.io/ovrbJj6CRduRgSA0Wzg2zg)
- Triage
- Anything else?

## Triage

### FCPs

<a href="https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3AT-libs-api+label%3Aproposed-final-comment-period">3 <code>rust-lang/rust</code> FCPs</a>

  - [[merge 85766](https://github.com/rust-lang/rust/issues/85766#issuecomment-849994105)] *Stabilize File::options()* - (2 checkboxes left)
  - [[merge 44434](https://github.com/rust-lang/rust/issues/44434#issuecomment-865374685)] *Provide an API to extract fields from Command builder* - (3 checkboxes left)
  - [[merge 80690](https://github.com/rust-lang/rust/issues/80690#issuecomment-846481791)] *Tracking Issue for BufWriter::into\_raw\_parts* - (1 checkboxes left)
<p></p>

[yaahc (1)](https://rfcbot.rs/fcp/yaahc), [Amanieu (1)](https://rfcbot.rs/fcp/Amanieu), [joshtriplett (1)](https://rfcbot.rs/fcp/joshtriplett), [m-ou-se (3)](https://rfcbot.rs/fcp/m-ou-se)

### Nominated

- [5 `rust-lang/rust` `T-libs-api` `I-nominated` items](https://github.com/rust-lang/rust/issues?q=is:open+label:T-libs-api+label:I-nominated)
  - [[83447](https://github.com/rust-lang/rust/pull/83447)] *Add u8::to\_digit method*
    - Close it. Josh to write a reply.
    - Counterproposal: `uN::parse_char_radix(char, radix) -> Option<uN>`
    - Gently deprecate char::to_digit in favor of the above?
  - [[83791](https://github.com/rust-lang/rust/pull/83791)] *Weaken guarantee around advancing underlying iterators in zip*
  - [[87173](https://github.com/rust-lang/rust/pull/87173)] *unstable proc\_macro tracked::\* rename/restructure*
    - No need for a deep structure. We just have files and environment variables. Maybe a third thing in the future, but not much more.
    - Paths should OsStr instead of str, so we can track non-utf8 paths if that's supported at some time. (unrelated to this PR)
      - David: `AsRef<str> + AsRef<OsStr>` - then we can remove a bound later.
    - Josh replied
  - [[87264](https://github.com/rust-lang/rust/pull/87264)] *proc\_macro: Add an expand\_literal method to TokenStream*
    - Name it `expand_expr`, for now only handling literals.
    - Josh will reply
  - [[87408](https://github.com/rust-lang/rust/pull/87408)] *Hide allocator details from TryReserveError*
    - looks good. jane to r+.
    - next up: FCP on stabilizing the outer type.
- [1 `rust-lang/rfcs` `T-libs-api` `I-nominated` items](https://github.com/rust-lang/rfcs/issues?q=is:open+label:T-libs-api+label:I-nominated)
  - [[3151](https://github.com/rust-lang/rfcs/pull/3151)] *Scoped threads in the standard library, take 2*
    - Leak: let's not wait for it. Unclear what is going to happen.
    - Jane to reach out to wg-async-foundations.
    - Ready for FCP soon, as soon as bstrie finishes updating the alternatives section.

### Waiting on team

- [1 `rust-lang/rust` `T-libs-api` `S-waiting-on-team` items](https://github.com/rust-lang/rust/issues?q=is:open+label:T-libs-api+label:S-waiting-on-team)
  - [[66358](https://github.com/rust-lang/rust/issues/66358)] *Tracking issue for \`UnsafeCell::raw\_get\`*

### Needs decision

- [7 `rust-lang/rust` `T-libs-api` `I-needs-decision` items](https://github.com/rust-lang/rust/issues?q=is:open+label:T-libs-api+label:I-needs-decision)
  - [[80190](https://github.com/rust-lang/rust/issues/80190)] *API: Add \`err\_or\` and \`err\_or\_else\` to \`Option\`*
    - Let's see if there's a use case. If there is, we can add it as unstable and see afterwards if it's worth stabilizing.
  - [[25053](https://github.com/rust-lang/rust/issues/25053)] *UnsafeCell should implement the Copy trait*
  - [[26951](https://github.com/rust-lang/rust/issues/26951)] `P-low` *Abort on some large allocation requests, Panic on other*
  - [[37868](https://github.com/rust-lang/rust/issues/37868)] *std::process::Command's current\_dir behaves differently on Unix and Windows, with respect to relative exe paths*
  - [[56889](https://github.com/rust-lang/rust/issues/56889)] *Write::write\_all erroring when encountering Ok(0) interacts poorly with the contract of Write::write*
  - [[59878](https://github.com/rust-lang/rust/issues/59878)] *Box\<\[T\]\> should have an IntoIter implementation.*
  - [[62726](https://github.com/rust-lang/rust/issues/62726)] *Tracking issue for io\_slice\_advance*
  - [[87228](https://github.com/rust-lang/rust/issues/87228)] *Decide whether \`asm!\` and/or \`global\_asm!\` should be exported from the prelude.*

## Actions

- [ ] Reply to all issues/PRs discussed in this meeting, or add them to the [open action items](https://hackmd.io/ovrbJj6CRduRgSA0Wzg2zg).

_Generated by [fully-automatic-rust-libs-team-triage-meeting-agenda-generator](https://github.com/rust-lang/libs-team/tree/main/tools/agenda-generator)_
