---
# System prepended metadata

title: Libs Meeting 2021-02-10/11
tags: [Minutes, Libs Meetings]

---

# Libs Meeting 2021-02-10/11

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

**Attendees**: KodrAus, Amanieu, dtolnay, Mara, joshtriplett

## Agenda

- [Open action items](https://hackmd.io/ovrbJj6CRduRgSA0Wzg2zg)
- Edition 2021
  - Range types
  - Prelude
    - Ask Dirkjan if he's still interested.
- Triage
- Anything else?

## Triage

### FCPs

6 open T-libs FCPs:
<details><summary><a href="https://github.com/rust-lang/rfcs/issues?q=is%3Aopen+label%3AT-libs+label%3Aproposed-final-comment-period">2 <code>rust-lang/rfcs</code> FCPs</a></summary>

  - [[close 2944](https://github.com/rust-lang/rfcs/issues/2944#issuecomment-714795934)] *RFC: add the Freeze trait to libcore/libstd* - (2 checkboxes left)
  - [[close 2708](https://github.com/rust-lang/rfcs/issues/2708#issuecomment-724941427)] *Generic Pointer to Field* - (2 checkboxes left)
</details>
<details><summary><a href="https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3AT-libs+label%3Aproposed-final-comment-period">4 <code>rust-lang/rust</code> FCPs</a></summary>

  - [[merge 81050](https://github.com/rust-lang/rust/issues/81050#issuecomment-765341798)] *Stabilize core::task::ready!* - (3 checkboxes left)
  - [[merge 77704](https://github.com/rust-lang/rust/issues/77704#issuecomment-760056634)] *Implement indexing slices with pairs of core::ops::Bound&lt;usize&gt;* - (3 checkboxes left)
  - [[merge 70516](https://github.com/rust-lang/rust/issues/70516#issuecomment-771646381)] *Tracking Issue for ASCII methods on OsStr* - (3 checkboxes left)
  - [[merge 74773](https://github.com/rust-lang/rust/issues/74773#issuecomment-776643142)] *Tracking Issue for str\_split\_once* - (5 checkboxes left)
</details>
<p></p>

[Amanieu (2)](https://rfcbot.rs/fcp/Amanieu), [BurntSushi (6)](https://rfcbot.rs/fcp/BurntSushi), [KodrAus (2)](https://rfcbot.rs/fcp/KodrAus), [dtolnay (1)](https://rfcbot.rs/fcp/dtolnay), [m-ou-se (1)](https://rfcbot.rs/fcp/m-ou-se), [sfackler (2)](https://rfcbot.rs/fcp/sfackler), [withoutboats (4)](https://rfcbot.rs/fcp/withoutboats)

### Nominated

- [2 `rust-lang/rfcs` items](https://github.com/rust-lang/rfcs/issues?q=is%3Aopen+label%3AT-libs+label%3AI-nominated)
  - [[2979](https://github.com/rust-lang/rfcs/pull/2979)] *\[RFC\]: Libs Team Governance*
  - [[3058](https://github.com/rust-lang/rfcs/pull/3058)] *try\_trait\_v2: A new design for the ? desugaring*
    - Discuss next week, when scott joins us.
    - Read before the meeting.
- [0 `rust-lang/rust` items](https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3AT-libs+label%3AI-nominated)

### Waiting on team

- [0 `rust-lang/rfcs` items](https://github.com/rust-lang/rfcs/issues?q=is%3Aopen+label%3AT-libs+label%3AS-waiting-on-team)
- [5 `rust-lang/rust` items](https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3AT-libs+label%3AS-waiting-on-team)
  - [[71780](https://github.com/rust-lang/rust/pull/71780)] *Implement String::remove\_matches*
    - Unstable. Libs-impl?
  - [[76901](https://github.com/rust-lang/rust/pull/76901)] *Implement RFC 2500 Needle API (Part 1)*
    - Needs a reviewer. We don't have the reviewer bandwidth. :(
    - KodrAus to take a look: both burnsushi and withoutboats both suggested the current API might need a bit of a rethink.
  - [[77326](https://github.com/rust-lang/rust/pull/77326)] *Stabilize \`Option::unwrap\_none\` and \`Option::expect\_none\`*
    - assert on is_none() good enough?
    - could still be useful for nicer syntax, to have it as a suffix.
    - fcp close
  - [[77728](https://github.com/rust-lang/rust/pull/77728)] *Expose force\_quotes,*
    - Seal `CommandExt` after crater run. <- Amanieu
    - RFC for portability lint could help for similar situations, to not use extension traits for platform-specific stuff anymore.
      - dtolnay to write the idea down
  - [[80572](https://github.com/rust-lang/rust/pull/80572)] *Add a \`Result::ok\_or\_err\` method to extract a \`T\` from \`Result\<T, T\>\`*
    - Yes, we should have this method.
    - Names are hard. Proposed one seems okay.
    - Alternatively, `into_inner()`?
    - Merge as is, unstably. Bikeshed more later. :)

### Needs decision

- [14 `rust-lang/rust` items](https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3AT-libs+label%3AI-needs-decision)
  - [[21319](https://github.com/rust-lang/rust/issues/21319)] *Consider making std::thread::Builder reusable*
    - KodrAus to write reply
  - [[25053](https://github.com/rust-lang/rust/issues/25053)] *UnsafeCell should implement the Copy trait*
    - Language issue?
  - [[26951](https://github.com/rust-lang/rust/issues/26951)] *Abort on some large allocation requests, Panic on other*
  - [[29494](https://github.com/rust-lang/rust/issues/29494)] *Command does not escape arguments as expected on windows*
  - [[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*
  - [[39081](https://github.com/rust-lang/rust/issues/39081)] *\`std::env::temp\_dir\` should return env var XDG\_RUNTIME\_DIR under Linux if declared*
    - fcp close?
  - [[39186](https://github.com/rust-lang/rust/issues/39186)] *Document that std::os::unix::process::CommandExt.uid() triggers setgroups(0,0)*
    - Mara to check this.
  - [[42412](https://github.com/rust-lang/rust/issues/42412)] *Incorporate @raphlinus' container cheat sheet into the std::collections module docs*
  - [[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.*
  - [[60880](https://github.com/rust-lang/rust/issues/60880)] *Should Thumb bugs get increased visibility, e.g. Tier 1 status?*
  - [[62726](https://github.com/rust-lang/rust/issues/62726)] *Tracking issue for io\_slice\_advance*
  - [[79490](https://github.com/rust-lang/rust/issues/79490)] *Whether floating point value Display should adhere to IEEE standard?*
  - [[80823](https://github.com/rust-lang/rust/pull/80823)] *Add Cow::disown\_if() and Cow::disown\_if\_eq()*

## Actions

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