# Libs Meeting 2025-01-15

###### 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/132484 *unix: Relax escaping in \`Debug\` impl on \`Command\`* - (3 checkboxes left)
- merge rust.tf/133485 *\[discussion\]\[donotmerge\]: Copy Python implementation for \`float::div\_euclid\`* - (3 checkboxes left)

[Amanieu (1)](https://rfcbot.rs/fcp/Amanieu), [the8472 (2)](https://rfcbot.rs/fcp/the8472), [joshtriplett (2)](https://rfcbot.rs/fcp/joshtriplett), [cuviper (1)](https://rfcbot.rs/fcp/cuviper), [m-ou-se (2)](https://rfcbot.rs/fcp/m-ou-se)

### (Backports) rust.tf/135104 *do not in\-place\-iterate over flatmap/flatten*

Beta accepted

### (Prioritization Requested) rust.tf/134713 *\`std::ptr::swap\_nonoverlapping\` is not always untyped*

P-high

### (Nominated) rust.tf/125087 *Optimize \`Seek::stream\_len\` impl for \`File\`*

### (Nominated) rust.tf/133170 *std: print a backtrace on stackoverflow*

The8472 to fcp close

### (Nominated) rust.tf/134286 *Enable \`unreachable\_pub\` lint in core*

### (Nominated) rust.tf/135376 *Status of the riscv32im\-risc0\-zkvm\-elf target*

From the target tier policy document:

Tier 3:

> std for targets with an operating system or equivalent layer of system-provided functionality), but may leave some code unimplemented (either unavailable or stubbed out as appropriate), whether because the target makes it impossible to implement or challenging to implement.

Tier 2:

> Tier 2 targets must not leave any significant portions of core or the standard library unimplemented or stubbed out, unless they cannot possibly be supported on the target.

### (Waiting on team) rust.tf/135340 *Add \`explicit\_extern\_abis\` Feature and Enforce Explicit ABIs*

### (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 \`\_mm256\_avg\_epu8\` after 1.75.0*

### (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).

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