1.99.0

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Fix the tagged-union pattern-matching recommendation

Status: Merged (completed).

rust-lang/referencenumber 2303

#2303 In rust-lang/reference;

· by traviscross was closed on Jul 9, 2026

Structs with no fields or all-ZST fields are ZSTs

disposition-merge

finished-final-comment-period

I-lang-radarItems that are on lang's radar and will need eventual work or consideration.Items that are on lang's radar and will need eventual work or consideration.

T-langRelevant to the language team.Relevant to the language team.

to-announce

Status: Merged (completed).

rust-lang/referencenumber 2262

#2262 In rust-lang/reference;

· by DanielEScherzer was closed on Jul 7, 2026

macros.md: fix case

Status: Merged (completed).

rust-lang/referencenumber 2307

#2307 In rust-lang/reference;

· by tshepang was closed on Jul 6, 2026

Bump railroad-dependency

Status: Merged (completed).

rust-lang/referencenumber 2305

#2305 In rust-lang/reference;

· by lukaslueg was closed on Jul 6, 2026

add c-variadic function definitions

Status: Merged (completed).

rust-lang/referencenumber 2177

#2177 In rust-lang/reference;

· by folkertdev was closed on Aug 8, 2026

Update no_mangle to use the attribute template

Status: Merged (completed).

rust-lang/referencenumber 1904

#1904 In rust-lang/reference;

· by ehuss was closed on Aug 6, 2026

enums with fields: clarify that repr(C, int) is quite different from repr(int)

Status: Merged (completed).

rust-lang/referencenumber 2227

#2227 In rust-lang/reference;

· by RalfJung was closed on Aug 5, 2026

aliasing rules also apply inside private fields

Status: Merged (completed).

rust-lang/referencenumber 2304

#2304 In rust-lang/reference;

· by RalfJung was closed on Aug 4, 2026

attributes: do not explain syntax in rules

Status: Merged (completed).

rust-lang/referencenumber 2306

#2306 In rust-lang/reference;

· by tshepang was closed on Aug 4, 2026

Document prohibition on inner attribute macros

Status: Merged (completed).

rust-lang/referencenumber 2311

#2311 In rust-lang/reference;

· by ehuss was closed on Aug 4, 2026

Use authentication for linkcheck

Status: Merged (completed).

rust-lang/referencenumber 2319

#2319 In rust-lang/reference;

· by ehuss was closed on Aug 4, 2026

Stabilize passing 128-bit integers via vector registers with asm! on x86

S-waiting-on-stabilizationWaiting for a stabilization PR to be merged in the main Rust repositoryWaiting for a stabilization PR to be merged in the main Rust repository

Status: Merged (completed).

rust-lang/referencenumber 2313

#2313 In rust-lang/reference;

· by folkertdev was closed on Aug 4, 2026

Add a rule for attribute macro outline modules

Status: Merged (completed).

rust-lang/referencenumber 2310

#2310 In rust-lang/reference;

· by ehuss was closed on Jul 28, 2026