---
# System prepended metadata

title: Libs Meeting 2021-05-12
tags: [Minutes, Libs Meetings]

---

# Libs Meeting 2021-05-12

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

**Attendees**: ...

## Agenda

- [Open action items](https://hackmd.io/ovrbJj6CRduRgSA0Wzg2zg)
- Libs team charter
- There's many open issues and PRs on the RFCs repository ([link](https://github.com/rust-lang/rfcs/labels/T-libs))
  - 'backlog bonanza' meetings like the lang team did?
  - close issues - move to internals? (disable issues on `rfcs`?)
    - Josh: ping lang and ask core
- Conversion methods to replace `as` ([zulip thread](https://rust-lang.zulipchat.com/#narrow/stream/219381-t-libs/topic/Adding.20methods.20as.20more.20specific.20versions.20of.20.60as.60))
  - Originally from lang meeting: lint for `func as i16` -> lint for `pointer as i16` (when it doesn't fit)
  - `pointer as usize as i16` isn't a great alternative. maybe `thing.truncate()`? `pointer.address()`? `pointer.to_bits()`?
  - `usize -> u64` function only on 64-bit platforms?
  - generally in favour, but we'd like more complete proposals. grouping them instead of individual PRs would be nice.
- Triage
- Anything else?

## Triage

### FCPs

10 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>

  - [[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)
  - [[postpone 2722](https://github.com/rust-lang/rfcs/issues/2722#issuecomment-832934904)] *Allow Overloading || and &amp;&amp;* - (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">8 <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}\`* - (3 checkboxes left)
  - [[merge 84612](https://github.com/rust-lang/rust/issues/84612#issuecomment-831905813)] *Use try\_reserve in Vec's io::Write* - (3 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\`* - (3 checkboxes left)
  - [[merge 74372](https://github.com/rust-lang/rust/issues/74372#issuecomment-832838296)] *Tracking issue for WebAssembly SIMD support* - (3 checkboxes left)
  - [[merge 84910](https://github.com/rust-lang/rust/issues/84910#issuecomment-833230769)] *stabilize \`int\_error\_matching\`* - (3 checkboxes left)
  - [[merge 84983](https://github.com/rust-lang/rust/issues/84983#issuecomment-833875250)] *Error table reformatting (includes bikeshed)* - (4 checkboxes left)
</details>
<p></p>

[Amanieu (2)](https://rfcbot.rs/fcp/Amanieu), [BurntSushi (1)](https://rfcbot.rs/fcp/BurntSushi), [dtolnay (1)](https://rfcbot.rs/fcp/dtolnay), [joshtriplett (0)](https://rfcbot.rs/fcp/joshtriplett), [m-ou-se (5)](https://rfcbot.rs/fcp/m-ou-se), [sfackler (8)](https://rfcbot.rs/fcp/sfackler), [yaahc (6)](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)
  - [[84838](https://github.com/rust-lang/rust/pull/84838)] *implement \`Default\` for all arrays*
    (nominated for lang team)

### 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)
- [2 `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*

### Needs decision

- [7 `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*

### Tracking issues

- [207 `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)

## 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)_

