Who contributed to Rust on May 27, 2026?

2 developers shipped this update, including ada4a and renovate[bot].

What were the notable Rust updates?

Rollup merge of #156541 - aerooneqq:delegation-no-method-call, r=petrochenkov, fix(assists/add_reference_here): _modify_ the reference type when dealing with &T->&mut T, and Auto merge of #156967 - JonathanBrouwer:rollup-cDWgT7T, r=JonathanBrouwer.

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The Wire · Showcase

RUST DELEGATION LANDS, ANALYZER FIXES REFERENCE COERCION BUG

By RepoJournal · Filed 06:05 UTC on May 27, 2026 · About Rust

2 people shipped this

renovate[bot] @renovate[bot] 2 cited

ada4a @ada4a 1 cited

The compiler shipped delegation without method call generation [ref:6], while rust-analyzer fixed a critical assist that was stacking references instead of converting them [ref:13].

Delegation is now live in the compiler [1], removing the old method call generation path and reusing the method probing engine to handle adjustments. This extends support to trait methods and sets the foundation for free function delegation. The change is part of the larger delegation work tracked in rust-lang/rust#118212 and ships in today's rollup [3], which also includes stdarch updates and better error messages for unimplemented trait methods [3]. Over on rust-analyzer, a nasty bug in the add_reference_here assist is fixed [2]: it was incorrectly stacking references when converting &T to &mut T instead of modifying the existing reference. The fix ships in the latest nightly [12]. On the infrastructure side, the tidy tool got a cleanup [4], and the LLDB debugging integration finally has proper callback registration [5]. Crates.io saw routine updates to the tsoracle driver ecosystem [6] [7] [8], plus a crate deletion [9]. Annotate-snippets pulled in two consecutive prek dependency updates [10] [11], with v0.4.3 fixing stat-only hook rewrites.

Action items

→ Update to latest rust-analyzer nightly if you use add_reference_here assist rust-lang/rust-analyzer [immediate]
→ Test delegation in your codebase after this rollup lands rust-lang/rust [plan]
→ Monitor delegation stability across next few nightly cycles rust-lang/rust [monitor]

References

[1] Rollup merge of #156541 - aerooneqq:delegation-no-method-call, r=petrochenkov rust-lang/rust
[2] fix(assists/add_reference_here): _modify_ the reference type when dealing with &T->&mut T ↗ rust-lang/rust-analyzer
[3] Auto merge of #156967 - JonathanBrouwer:rollup-cDWgT7T, r=JonathanBrouwer rust-lang/rust
[4] Rollup merge of #156761 - kcx1:fix/156730, r=tgross35 rust-lang/rust
[5] Rollup merge of #156899 - Walnut356:lldb_batchmode, r=jieyouxu rust-lang/rust
[6] Update crate `tsoracle-driver-file` rust-lang/crates.io-index
[7] Update crate `tsoracle-client` rust-lang/crates.io-index
[8] Update crate `tsoracle-server` rust-lang/crates.io-index
[9] Delete crate `ax-plat-dyn` rust-lang/crates.io-index
[10] chore(deps): Update Prek to v0.4.3 ↗ rust-lang/annotate-snippets-rs
[11] chore(deps): Update Prek to v0.4.2 ↗ rust-lang/annotate-snippets-rs
[12] nightly ↗ rust-lang/rust-analyzer

Quick answers

What shipped in Rust on May 27, 2026?: The compiler shipped delegation without method call generation [ref:6], while rust-analyzer fixed a critical assist that was stacking references instead of converting them [ref:13]. In total, 68 commits, 13 pull requests, and 1 releases landed.
Who contributed to Rust on May 27, 2026?: 2 developers shipped this update, including ada4a and renovate[bot].
What were the notable Rust updates?: Rollup merge of #156541 - aerooneqq:delegation-no-method-call, r=petrochenkov, fix(assists/add_reference_here): _modify_ the reference type when dealing with &T->&mut T, and Auto merge of #156967 - JonathanBrouwer:rollup-cDWgT7T, r=JonathanBrouwer.

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