---
# System prepended metadata

title: Libs Meeting 2026-01-07
tags: [Minutes, Libs Meetings]

---

# Libs Meeting 2026-01-07

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

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

## Agenda

- Triage
- Anything else?

## Triage

### FCPs

1 rust-lang/rust T-libs FCPs

  - merge rust.tf/132484 *unix: Relax escaping in \`Debug\` impl on \`Command\`* - (0 checkboxes left)





### (Prioritization Requested) rust.tf/149752 *TrivialClone is not derived for generic types (Performance regression)*

Josh commented: https://github.com/rust-lang/rust/issues/149752#issuecomment-3719885212

### (Prioritization Requested) rust.tf/150505 *the minimum possible value of SystemTime has been reduced on nightly on Windows*


### (Nominated) rust.tf/131894 *Volatile reads and writes on aarch64 sometimes generate instructions not suitable for MMIO in protected VMs*


### (Waiting on team) rust.tf/122408 *Use futex\-based synchronization on Apple platforms*

### (Waiting on team) rust.tf/149797 *riscv32im\-unknown\-openvm\-elf: add target*

### (Waiting on team) rust.tf/149834 *Observe \`close(2)\` errors for \`std::fs::{copy, write}\`*



### (Regressions) rust.tf/139730 `P-high` *A case of compound x86\_64 performance regression caused by LLVM 20 and #124810*

### (Regressions) rust.tf/147964 `P-high` *regression: the method \`as\_ref\` exists for reference*

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

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

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

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

### (Regressions) rust.tf/142119 `P-medium` *Linking a Rust staticlib unexpectedly changes C math functions from libm to bundled ones from compiler\-builtins*

### (Regressions) rust.tf/142345 `P-low` *\`pin!()\` macro no longer constant\-promotes \`&mut\` references to empty arrays*

### (Regressions) rust.tf/145424 *rustc output no longer reproducible if it crashes*


## 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)_
