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Added better blocking messages for fine grain locking

A-build-executionArea: anything dealing with executing the compilerArea: anything dealing with executing the compiler

A-configurationArea: cargo config files and env varsArea: cargo config files and env vars

A-filesystemArea: issues with filesystemsArea: issues with filesystems

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties.Status: Awaiting review from the assignee but also interested parties.

Status: Open (in progress).

rust-lang/cargonumber 16463

#16463 In rust-lang/cargo;

· ranger-ross opened on Jan 4, 2026

Set <code>TMPDIR</code> for build scripts and <code>rustc</code>

A-build-executionArea: anything dealing with executing the compilerArea: anything dealing with executing the compiler

A-build-scriptsArea: build.rs scriptsArea: build.rs scripts

C-feature-requestCategory: proposal for a feature. Before PR, ping rust-lang/cargo if this is not `Feature accepted`Category: proposal for a feature. Before PR, ping rust-lang/cargo if this is not `Feature accepted`

S-triageStatus: This issue is waiting on initial triage.Status: This issue is waiting on initial triage.

Status: Open.

#16427 In rust-lang/cargo;

· madsmtm opened on Dec 23, 2025

Set <code>TMPDIR</code> / <code>TMP</code>+<code>TEMP</code> environment variables

A-build-executionArea: anything dealing with executing the compilerArea: anything dealing with executing the compiler

A-build-scriptsArea: build.rs scriptsArea: build.rs scripts

A-layoutArea: target output directory layout, naming, and organizationArea: target output directory layout, naming, and organization

Status: Draft (not ready).

rust-lang/cargonumber 16426

#16426 In rust-lang/cargo;

· madsmtm opened on Dec 23, 2025

feat(test): Make CARGO_BIN_EXE_ available at runtime

A-build-executionArea: anything dealing with executing the compilerArea: anything dealing with executing the compiler

A-build-scriptsArea: build.rs scriptsArea: build.rs scripts

A-cli-helpArea: built-in command-line helpArea: built-in command-line help

A-documenting-cargo-itselfArea: Cargo's documentationArea: Cargo's documentation

Command-run

Command-test

disposition-mergeFCP with intent to mergeFCP with intent to merge

final-comment-periodFCP — a period for last comments before action is takenFCP — a period for last comments before action is taken

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties.Status: Awaiting review from the assignee but also interested parties.

T-cargoTeam: CargoTeam: Cargo

Status: Open (in progress).

rust-lang/cargonumber 16421

#16421 In rust-lang/cargo;

· epage opened on Dec 19, 2025

fix(timing)!: remove <code>--timings=&lt;FMT&gt;</code> optional format values

A-build-executionArea: anything dealing with executing the compilerArea: anything dealing with executing the compiler

A-cliArea: Command-line interface, option parsing, etc.Area: Command-line interface, option parsing, etc.

A-cli-helpArea: built-in command-line helpArea: built-in command-line help

A-documenting-cargo-itselfArea: Cargo's documentationArea: Cargo's documentation

A-json-outputArea: JSON message outputArea: JSON message output

A-timingsArea: timingsArea: timings

disposition-mergeFCP with intent to mergeFCP with intent to merge

proposed-final-comment-periodAn FCP proposal has started, but not yet signed off.An FCP proposal has started, but not yet signed off.

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties.Status: Awaiting review from the assignee but also interested parties.

T-cargoTeam: CargoTeam: Cargo

Status: Open (in progress).

rust-lang/cargonumber 16420

#16420 In rust-lang/cargo;

· weihanglo opened on Dec 19, 2025

feat: in-memory only <code>Manifest</code>

A-build-executionArea: anything dealing with executing the compilerArea: anything dealing with executing the compiler

A-manifestArea: Cargo.toml issuesArea: Cargo.toml issues

A-workspacesArea: workspacesArea: workspaces

Command-fix

Command-vendor

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties.Status: Awaiting review from the assignee but also interested parties.

Status: Open (in progress).

rust-lang/cargonumber 16409

#16409 In rust-lang/cargo;

· secona opened on Dec 17, 2025

Enable new layout on Cargo's tests

A-build-executionArea: anything dealing with executing the compilerArea: anything dealing with executing the compiler

A-documenting-cargo-itselfArea: Cargo's documentationArea: Cargo's documentation

A-layoutArea: target output directory layout, naming, and organizationArea: target output directory layout, naming, and organization

A-testing-cargo-itselfArea: cargo's testsArea: cargo's tests

A-unstableArea: nightly unstable supportArea: nightly unstable support

Command-clean

S-waiting-on-authorStatus: The marked PR is awaiting some action (such as code changes) from the PR author.Status: The marked PR is awaiting some action (such as code changes) from the PR author.

Status: Draft (not ready).

rust-lang/cargonumber 16375

#16375 In rust-lang/cargo;

· epage opened on Dec 10, 2025

Added <code>CARGO_BUILD_DIR_LAYOUT_V2</code> env var to opt in/out of new layout

A-build-executionArea: anything dealing with executing the compilerArea: anything dealing with executing the compiler

A-documenting-cargo-itselfArea: Cargo's documentationArea: Cargo's documentation

A-layoutArea: target output directory layout, naming, and organizationArea: target output directory layout, naming, and organization

A-unstableArea: nightly unstable supportArea: nightly unstable support

Command-clean

S-waiting-on-authorStatus: The marked PR is awaiting some action (such as code changes) from the PR author.Status: The marked PR is awaiting some action (such as code changes) from the PR author.

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties.Status: Awaiting review from the assignee but also interested parties.

T-cargoTeam: CargoTeam: Cargo

Status: Open (in progress).

rust-lang/cargonumber 16336

#16336 In rust-lang/cargo;

· ranger-ross opened on Dec 4, 2025

Build script: Adding directive cargo::no-new-rust-code to speed up compilation

A-build-executionArea: anything dealing with executing the compilerArea: anything dealing with executing the compiler

A-build-scriptsArea: build.rs scriptsArea: build.rs scripts

C-feature-requestCategory: proposal for a feature. Before PR, ping rust-lang/cargo if this is not `Feature accepted`Category: proposal for a feature. Before PR, ping rust-lang/cargo if this is not `Feature accepted`

PerformanceGotta go fast!Gotta go fast!

S-needs-designStatus: Needs someone to work further on the design for the feature or fix. NOT YET accepted.Status: Needs someone to work further on the design for the feature or fix. NOT YET accepted.

Status: Open.

#16062 In rust-lang/cargo;

· NobodyXu opened on Oct 7, 2025

Fix: avoid -C prefer-dynamic for test harnesses of proc-macro crates

A-build-executionArea: anything dealing with executing the compilerArea: anything dealing with executing the compiler

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties.Status: Awaiting review from the assignee but also interested parties.

Status: Open (in progress).

rust-lang/cargonumber 16024

#16024 In rust-lang/cargo;

· tommantonclery opened on Sep 30, 2025

Rustc does not take version requirements into account with deprecation warnings

A-build-executionArea: anything dealing with executing the compilerArea: anything dealing with executing the compiler

A-crate-dependenciesArea: [dependencies] of any kindArea: [dependencies] of any kind

C-bugCategory: bugCategory: bug

S-needs-designStatus: Needs someone to work further on the design for the feature or fix. NOT YET accepted.Status: Needs someone to work further on the design for the feature or fix. NOT YET accepted.

Status: Open.

#15907 In rust-lang/cargo;

· rom1v opened on Sep 2, 2025

Add <code>cfg_version</code> support

A-build-executionArea: anything dealing with executing the compilerArea: anything dealing with executing the compiler

A-build-scriptsArea: build.rs scriptsArea: build.rs scripts

A-cfg-exprArea: Platform cfg expressionsArea: Platform cfg expressions

S-waiting-on-authorStatus: The marked PR is awaiting some action (such as code changes) from the PR author.Status: The marked PR is awaiting some action (such as code changes) from the PR author.

Status: Open (in progress).

rust-lang/cargonumber 15533

#15533 In rust-lang/cargo;

· mo8it opened on May 16, 2025