---
# System prepended metadata

title: Libs Meeting 2021-02-03
tags: [Minutes, Libs Meetings]

---

# Libs Meeting 2021-02-03

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

**Attendees**: Amanieu, sfackler, dtolnay, Yaahc, JoshTriplett, Mara

## Agenda

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

## Triage

### FCPs

9 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">3 <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)
  - [[merge 2996](https://github.com/rust-lang/rfcs/issues/2996#issuecomment-747664240)] *adds async stream rfc* - (3 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">6 <code>rust-lang/rust</code> FCPs</a></summary>

  - [[close 80595](https://github.com/rust-lang/rust/issues/80595#issuecomment-753374897)] *\`impl PartialEq&lt;Punct&gt; for char\`; symmetry for #78636* - (3 checkboxes left)
  - [[merge 78880](https://github.com/rust-lang/rust/issues/78880#issuecomment-759882257)] *Add \`NotSupported\` to \`std::io::ErrorKind\`* - (3 checkboxes left)
  - [[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)
  - [[close 75793](https://github.com/rust-lang/rust/issues/75793#issuecomment-769762122)] *Impl task::Wake for Fn* - (3 checkboxes left)
  - [[merge 70516](https://github.com/rust-lang/rust/issues/70516#issuecomment-771646381)] *Tracking Issue for ASCII methods on OsStr* - (4 checkboxes left)
</details>
<p></p>

[Amanieu (1)](https://rfcbot.rs/fcp/Amanieu), [BurntSushi (8)](https://rfcbot.rs/fcp/BurntSushi), [KodrAus (1)](https://rfcbot.rs/fcp/KodrAus), [dtolnay (1)](https://rfcbot.rs/fcp/dtolnay), [m-ou-se (5)](https://rfcbot.rs/fcp/m-ou-se), [sfackler (2)](https://rfcbot.rs/fcp/sfackler), [withoutboats (8)](https://rfcbot.rs/fcp/withoutboats)

### Nominated

- [1 `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*
- [7 `rust-lang/rust` items](https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3AT-libs+label%3AI-nominated)
  - [[66481](https://github.com/rust-lang/rust/issues/66481)] *Context and Waker might be accidentally \`Sync\`*
    - Moved to wg-async-foundations last meeting.
  - [[72981](https://github.com/rust-lang/rust/pull/72981)] *Stabilize the backtrace feature.*
    FCP finished. Should be merged?
    - Type in core, all methods as an extension trait in std, imported `as _` into prelude
    - Alternatively: wait on std+core unification?
    - Check if we can add `impl Type` to std for types of core. This might be okay for non-trait stuff.
  - [[74304](https://github.com/rust-lang/rust/pull/74304)] *Stabilize the Wake trait*
    FCP finished. Should be merged?
    - Looks ready to be merged. Fine without the blanket impl.
  - [[79245](https://github.com/rust-lang/rust/pull/79245)] *BTreeMap: remove Ord bound where it will never be needed*
    FCP finished. Should be merged?
    - Still moving.
  - usize::BITS causing breakage - https://github.com/rust-lang/rust/issues/76904
    - Investigate: Stabilize for a future release? Warnings/errors about those should not be supressed by cap-lints.
    - Revert for now
    - lexical-core looks unmaintained. owner inactive on github, last commit long ago.
    - Maybe it can be fixed in `nom`, as the biggest consumer of this crate?
  - [[80962](https://github.com/rust-lang/rust/pull/80962)] *Stabilize remaining integer methods as \`const fn\`*
    - FCP already started. nothing to discuss.
  - [[81382](https://github.com/rust-lang/rust/pull/81382)] *Make \`is\_sorted\[\_by\_key\]\` require \`Ord\` instead of \`PartialOrd\` and remove \`Iterator::is\_sorted\_by\_key\`*
    - PartialOrd is fine, as that matches `<=`.
  - [[81460](https://github.com/rust-lang/rust/issues/81460)] *regression 1.51: lifetime may not live long enough with \`&impl Error\`*
    - This was expected. Wontfix.

### 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*
  - [[76901](https://github.com/rust-lang/rust/pull/76901)] *Implement RFC 2500 Needle API (Part 1)*
  - [[77326](https://github.com/rust-lang/rust/pull/77326)] *Stabilize \`Option::unwrap\_none\` and \`Option::expect\_none\`*
  - [[77728](https://github.com/rust-lang/rust/pull/77728)] *Expose force\_quotes,*
  - [[80572](https://github.com/rust-lang/rust/pull/80572)] *Add a \`Result::ok\_or\_err\` method to extract a \`T\` from \`Result\<T, T\>\`*

### Needs decision

- [15 `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*
  - [[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*
  - [[39081](https://github.com/rust-lang/rust/issues/39081)] *\`std::env::temp\_dir\` should return env var XDG\_RUNTIME\_DIR under Linux if declared*
  - [[39186](https://github.com/rust-lang/rust/issues/39186)] *Document that std::os::unix::process::CommandExt.uid() triggers setgroups(0,0)*
  - [[42412](https://github.com/rust-lang/rust/issues/42412)] *Incorporate @raphlinus' container cheat sheet into the std::collections module docs*
  - [[42951](https://github.com/rust-lang/rust/issues/42951)] *Spec request. Hasher: is write\_u32 eqivalent to 4 calls of write\_u8?*
  - [[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).
