# Libs Meeting 2025-08-13

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

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

## Agenda

- Triage
- Anything else?

## Triage

### FCPs

1 rust-lang/libs-team T-libs FCPs

- merge rust.tf/libs633 *Delegate libtest to the testing\-devex team* - (4 checkboxes left)

2 rust-lang/rust T-libs FCPs

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

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

### (Nominated) rust.tf/143164 `P-high` *New "type annotations needed" error in Rust nightly\-2025\-06\-24*

### (Nominated) rust.tf/145219 *Reduce size of Unicode tables*

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

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

### (Regressions) rust.tf/74820 `P-medium` *libtest panics when running \`should\_panic\` tests under QEMU armv7*

### (Regressions) rust.tf/81902 *RUST\_BACKTRACE truncated with \-Cpanic=abort*

### (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/139357 *Fix parameter order for \`\_by()\` variants of \`min\` / \`max\`/ \`minmax\` in \`std::cmp\`*

FCP finished. Should be merged?

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

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

## 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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