---
# System prepended metadata

title: Libs Meeting 2021-04-14
tags: [Minutes, Libs Meetings]

---

# Libs Meeting 2021-04-14

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

**Attendees**: ...

## Agenda

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

## Triage

### FCPs

6 open T-libs FCPs:

([Amanieu (1)](https://rfcbot.rs/fcp/Amanieu), [BurntSushi (3)](https://rfcbot.rs/fcp/BurntSushi), [dtolnay (0)](https://rfcbot.rs/fcp/dtolnay), [joshtriplett (1)](https://rfcbot.rs/fcp/joshtriplett), [m-ou-se (3)](https://rfcbot.rs/fcp/m-ou-se), [sfackler (3)](https://rfcbot.rs/fcp/sfackler))

- <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>
  - [[postpone 2594](https://github.com/rust-lang/rfcs/issues/2594#issuecomment-810282446)] *RFC: Custom DSTs* - (2 checkboxes left)
  - [[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)
   - Don't accept integers.
   - Accepting array syntax would be a better solution.
   - Diagnostic to suggest alternative for `concat_bytes!(123)`
- <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>
  - [[merge 84111](https://github.com/rust-lang/rust/issues/84111#issuecomment-818005366)] *Stabilize \`impl From&lt;\[(K, V); N\]&gt; for HashMap\`* - (3 checkboxes left)
    - r+
  - [[merge 84147](https://github.com/rust-lang/rust/issues/84147#issuecomment-818988924)] *Cautiously add IntoIterator for arrays by value* - (3 checkboxes left)
    - yay
  - [[merge 81050](https://github.com/rust-lang/rust/issues/81050#issuecomment-765341798)] *Stabilize core::task::ready!* - (1 checkboxes left)
    - `ready!()` could seem like it creates a ready future instead.
    - needs bikeshed
</details>
<p></p>

### Nominated

- [0 `rust-lang/rfcs` items](https://github.com/rust-lang/rfcs/issues?q=is%3Aopen+label%3AT-libs+label%3AI-nominated)
- [4 `rust-lang/rust` items](https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3AT-libs+label%3AI-nominated)
  - [[78271](https://github.com/rust-lang/rust/issues/78271)] *Tracking Issue for feature: "option\_insert"*
    - Still happy with `insert`
  - [[82786](https://github.com/rust-lang/rust/pull/82786)] *add the bool::not method.*
    - 'inherent traits' would also solve this.
    - we could still merge this, and replace it with inherent Not for bool later. but this PR will cause unused import warnings for Not.
  - [[83167](https://github.com/rust-lang/rust/issues/83167)] *Use const generics for stdarch intrinsics*
  - [[83994](https://github.com/rust-lang/rust/issues/83994)] *Exiting a process calls exit() which isn’t thread\-safe*
    - If all libc implementations have a thread-safe `exit()`, then we should just close this.


### 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)
- [4 `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)*
  - [[81642](https://github.com/rust-lang/rust/pull/81642)] *Allow deriving Into for primitive enums*
    - Bit too much for a regular PR. RFC?
  - [[81988](https://github.com/rust-lang/rust/pull/81988)] *Add doc aliases for a lot of the C standard library*
  - [[81989](https://github.com/rust-lang/rust/pull/81989)] *Add doc aliases for python and Java collections*

### 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

- Proposal: change the script to generate this query (omitting specific labels)

- [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)

## 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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