---
# System prepended metadata

title: Libs Meeting 2025-04-09
tags: [Minutes, Libs Meetings]

---

# Libs Meeting 2025-04-09

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

**Meeting Link**: https://meet.jit.si/rust-libs-meeting-ujepnbwg2lzqgt6wvrndwimi
**Attendees**: ...

## Agenda

- Triage
- Anything else?

## Triage

### FCPs

3 rust-lang/rust T-libs FCPs

  - merge rust.tf/115746 *Print thread ID in panic message* - (2 checkboxes left)
  - merge rust.tf/137122 *Specialize \`Iterator::eq{\_by}\` for \`TrustedLen\` iterators* - (3 checkboxes left)
  - merge rust.tf/132484 *unix: Relax escaping in \`Debug\` impl on \`Command\`* - (0 checkboxes left)

[Amanieu (1)](https://rfcbot.rs/fcp/Amanieu), [joshtriplett (2)](https://rfcbot.rs/fcp/joshtriplett), [m-ou-se (1)](https://rfcbot.rs/fcp/m-ou-se), [cuviper (1)](https://rfcbot.rs/fcp/cuviper)


### (Backports) rust.tf/139389 *make \`Arguments::as\_statically\_known\_str\` doc(hidden)*

Very low risk. Only adds doc(hidden). Accepted.

### (Prioritization Requested) rust.tf/139352 *New linker error when building diesel with rust\-beta on windows*

Amanieu: won't fix + compat note?

### (Prioritization Requested) rust.tf/139542 *Type inference regression in 1.86 stable, due to unstable ByteStr*

The 8472: aren't unstable things excluded from resolution?

Amanieu: Only from name resolution, not trait resolution.

Amanieu: How big is the impact of this? Do we need a crater run?

This isn't showing up in crater..

The 8472: Maybe it's not on crates.io or github?

https://crater-reports.s3.amazonaws.com/beta-1.86-rustdoc-1/beta-2025-02-18/reg/ssstar-0.7.3/log.txt

> this task or one of its parent failed: No space left on device (os error 28)

The 8472: it's already on stable. not much we can do.

JoshS: we could revert it. But scope seems small enough to just accept

Amenieu: conclusion: acceptable breakage.

Amanieu: we should ping the team behind crater about the out-of-space issues.

### (Nominated) rust.tf/129485 *Unstable Feature Usage Metrics*


### (Waiting on team) rust.tf/134536 *Lint on fn pointers comparisons in external macros*



### (Regressions) rust.tf/119560 *\`cargo test\` performance regression on Windows on version 1.75.0*

### (Regressions) rust.tf/53340 *Performance regression in tight loop since rust 1.25*

### (Regressions) rust.tf/112180 *assertion failed: key as usize != KEY\_SENTVAL in DragonFly BSD*

### (Regressions) rust.tf/124216 `P-medium` *Performance regression: rustc failed to optimize specific x86\-64 SIMD intrinsics after 1.75.0*

### (Regressions) rust.tf/134713 `P-high` *\`std::ptr::swap\_nonoverlapping\` is not always untyped*

### (Regressions) rust.tf/138054 `P-low` *unreachable pub item from portable\-simd with target\_feature = "avx512f"*

### (Regressions) rust.tf/130320 `P-medium` *stdlib code size increase in nightly\-2024\-09\-01 for aarch64\-linux\-android*


## Actions

- [ ] Reply to all issues/PRs discussed in this meeting, or add them to the [open action items](https://hackmd.io/Uehlc0qUQfWfvY1swYWRgQ).

_Generated by [fully-automatic-rust-libs-team-triage-meeting-agenda-generator](https://github.com/rust-lang/libs-team/tree/main/tools/agenda-generator)_
