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wire 2026-08-15
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$ the-wire · showcase

RUST-ANALYZER FIXES CONSTEVAL ERRORS AND RUSTC_PRIVATE SUPPORT

By RepoJournal · Filed · About Rust · Composed from the cited sources · methodology

ChayimFriedman2 renovate github-actions[bot] jhpratt jdonszelmann beetrees bors
9 people shipped this
ChayimFriedman2 @ChayimFriedman2 2 cited renovate @renovate 2 cited github-actions[bot] @github-actions[bot] 1 cited jhpratt @jhpratt 1 cited jdonszelmann @jdonszelmann 1 cited beetrees @beetrees 1 cited bors @bors Lukas Wirth @Veykril Jonathan Brouwer @JonathanBrouwer

Rust-analyzer stops returning misleading None values when const evaluation fails, aligning more closely with rustc's error handling strategy.

Rust-analyzer landed a critical fix that returns proper error constants to the solver when consteval fails [1], rather than incorrectly reporting None for cases like 32-bit architecture mismatches. The same commit also fixed rustc_private support for rustc_proc_macro [2], addressing integration issues with private compiler APIs. Both fixes rolled into the nightly release [3]. On the ecosystem side, crates.io bumped shiki to v4.4.3 [4] and futures-util to v0.3.34 [5], keeping the JavaScript and Rust dependency stacks current. Meanwhile, the compiler team merged 23 pull requests including stabilization work on allocators [6], f128 support on LLVM 23+, and a critical performance fix for the unic-ucd crate by avoiding fully_perform_locally with the next solver [7]. A PowerPC inline ASM fix corrected scalar float lane positioning on little-endian systems [8]. Across all desks, 89 commits and 26 PRs shipped in the last 24 hours.

Action items

References

  1. [1] fix: Return an error const to the solver when consteval fails ↗ rust-lang/rust-analyzer
  2. [2] Fix rustc_private support for rustc_proc_macro ↗ rust-lang/rust-analyzer
  3. [3] nightly ↗ rust-lang/rust-analyzer
  4. [4] Update shiki monorepo to v4.4.3 ↗ rust-lang/crates.io
  5. [5] Update Rust crate futures-util to v0.3.34 ↗ rust-lang/crates.io
  6. [6] Rollup of 23 pull requests ↗ rust-lang/rust
  7. [7] stop using fully_perform_locally with the next solver, it's worse (perf fix for unic-ucd) ↗ rust-lang/rust
  8. [8] PowerPC inline ASM: Fix scalar floats being in the wrong vector lane on little endian ↗ rust-lang/rust

$ ls rust-lang/reviews/ # the step-back reads

the week in review rustc to stop silently dropping unknown LLVM diagnostics the month in review Rust 1.99.0 lands with new raw-borrow lint
Full archive → Weekly reviews →

Quick answers

What shipped in Rust on August 15, 2026?
Rust-analyzer stops returning misleading None values when const evaluation fails, aligning more closely with rustc's error handling strategy. In total, 89 commits, 26 pull requests, and 1 releases landed.
Who contributed to Rust on August 15, 2026?
9 developers shipped this update, including bors, ChayimFriedman2, Lukas Wirth, github-actions[bot], renovate, Jonathan Brouwer, jhpratt, and jdonszelmann, and 1 more.
What were the notable Rust updates?
fix: Return an error const to the solver when consteval fails, Fix rustc_private support for rustc_proc_macro, and nightly.
♥

$ log @rust-lang --recent

docs.rs gets a lockfile refresh, rust-analyzer learns E0220 112 shipped Crates.io closes a crate-scope bypass 184 shipped Array drops fixed in order after partial moves 115 shipped rustup reworks directory overrides to match by identity, not canonical path 83 shipped

$ log --all # elsewhere on the wire

Alignment & Post-training verl defaults Ascend RL mode, open-instruct unblocks SFT packing AI Red Teaming Promptfoo fixes video cache mismatches and premature preview playback

$ ls showcases/

Safety Evals AI Red Teaming Agent Security Interpretability Alignment & Post-training

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