---
# System prepended metadata

title: Libs Meeting 2021-05-05
tags: [Minutes, Libs Meetings]

---

# Libs Meeting 2021-05-05

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

**Attendees**: dtolnay, jane, bstrie, josh, amanieu, john ericson, mara

## Agenda

- [Open action items](https://hackmd.io/ovrbJj6CRduRgSA0Wzg2zg)
- Libs charter
- Preliminary interest check in "What is a Rust implementation" conversation
    - Mara, Josh
- 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">1 <code>rust-lang/rfcs</code> FCPs</a></summary>

  - [[merge 2509](https://github.com/rust-lang/rfcs/issues/2509#issuecomment-801294327)] *RFC: Introduce \`concat\_bytes!()\` to join \`\[u8\]\` and byte \`str\` analogous to \`concat!\` for \`str\`* - (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">5 <code>rust-lang/rust</code> FCPs</a></summary>

  - [[merge 82179](https://github.com/rust-lang/rust/issues/82179#issuecomment-825049128)] *Add functions \`Duration::try\_from\_secs\_{f32, f64}\`* - (4 checkboxes left)
  - [[merge 84612](https://github.com/rust-lang/rust/issues/84612#issuecomment-831905813)] *Use try\_reserve in Vec's io::Write* - (6 checkboxes left)
  - [[merge 81050](https://github.com/rust-lang/rust/issues/81050#issuecomment-765341798)] *Stabilize core::task::ready!* - (1 checkboxes left)
  - [[merge 84111](https://github.com/rust-lang/rust/issues/84111#issuecomment-818005366)] *Stabilize \`impl From&lt;\[(K, V); N\]&gt; for HashMap\` (and friends)* - (1 checkboxes left)
  - [[merge 84640](https://github.com/rust-lang/rust/issues/84640#issuecomment-829631948)] *Implement \`TryFrom&lt;char&gt;\` for \`u8\`* - (4 checkboxes left)
</details>
<p></p>

[Amanieu (1)](https://rfcbot.rs/fcp/Amanieu), [BurntSushi (2)](https://rfcbot.rs/fcp/BurntSushi), [dtolnay (3)](https://rfcbot.rs/fcp/dtolnay), [joshtriplett (1)](https://rfcbot.rs/fcp/joshtriplett), [m-ou-se (5)](https://rfcbot.rs/fcp/m-ou-se), [sfackler (4)](https://rfcbot.rs/fcp/sfackler), [yaahc (2)](https://rfcbot.rs/fcp/yaahc)

### Nominated

- [0 `rust-lang/rfcs` items](https://github.com/rust-lang/rfcs/issues?q=is%3Aopen+label%3AT-libs+label%3AI-nominated)
- [1 `rust-lang/rust` items](https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3AT-libs+label%3AI-nominated)
  - [[84266](https://github.com/rust-lang/rust/pull/84266)] *WIP: alloc: Add default Cargo feature "global\-oom\-handling"*
    - Finish conclusion from last meeting

### 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)
- [6 `rust-lang/rust` items](https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3AT-libs+label%3AS-waiting-on-team)
  - [[76901](https://github.com/rust-lang/rust/pull/76901)] *Implement RFC 2500 Needle API (Part 1)*
  - [[79965](https://github.com/rust-lang/rust/pull/79965)] *More ErrorKinds for common errnos*
  - [[81642](https://github.com/rust-lang/rust/pull/81642)] *Allow deriving Into for primitive enums*
  - [[84612](https://github.com/rust-lang/rust/pull/84612)] *Use try\_reserve in Vec's io::Write*
  - [[84640](https://github.com/rust-lang/rust/pull/84640)] *Implement \`TryFrom\<char\>\` for \`u8\`*
  - [[84717](https://github.com/rust-lang/rust/pull/84717)] *impl FromStr for proc\_macro::Literal*

### Needs decision

- [8 `rust-lang/rust` items](https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3AT-libs+label%3AI-needs-decision)
  - [[25053](https://github.com/rust-lang/rust/issues/25053)] *UnsafeCell should implement the Copy trait*
  - [[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*
  - [[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*
  - [[81050](https://github.com/rust-lang/rust/pull/81050)] *Stabilize core::task::ready!*

### Tracking issues

- [203 `rust-lang/rust` items](https://github.com/rust-lang/rust/issues?page=6&q=is%3Aopen+label%3AT-libs+label%3AC-tracking-issue+-label%3AB-RFC-approved+-label%3AE-needs-test+-label%3Afinished-final-comment-period+-label%3Afinal-comment-period+-label%3AI-needs-decision)

## Notes

ready!() macro:
- dtolnay suggests `pend!()`
- josh: force `must_use`? mara+dtolnay: maybe not
- dtolnay to comment with `pend!()` suggestion

## Actions

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

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