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Stabilize <code>#[cfg(version(...))]</code>, take 2

disposition-mergeThis issue / PR is in PFCP or FCP with a disposition to merge it.This issue / PR is in PFCP or FCP with a disposition to merge it.

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.

needs-fcpThis change is insta-stable, or significant enough to need a team FCP to proceed.This change is insta-stable, or significant enough to need a team FCP to proceed.

proposed-final-comment-periodProposed to merge/close by relevant subteam, see T-<team> label. Will enter FCP once signed off.Proposed to merge/close by relevant subteam, see T-<team> label. Will enter FCP once signed off.

S-waiting-on-documentationStatus: Waiting on approved PRs to documentation before mergingStatus: Waiting on approved PRs to documentation before merging

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

T-langRelevant to the language teamRelevant to the language team

Status: Open (in progress).

rust-lang/rustnumber 141766

#141766 In rust-lang/rust;

· est31 opened on May 30, 2025

Remove #![feature(let_chains)] from libcore

A-testsuiteArea: The testsuite used to check the correctness of rustcArea: The testsuite used to check the correctness of rustc

merged-by-borsThis PR was explicitly merged by bors.This PR was explicitly merged by bors.

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-infraRelevant to the infrastructure team, which will review and decide on the PR/issue.Relevant to the infrastructure team, which will review and decide on the PR/issue.

T-libsRelevant to the library team, which will review and decide on the PR/issue.Relevant to the library team, which will review and decide on the PR/issue.

Status: Merged (completed).

rust-lang/rustnumber 141415

#141415 In rust-lang/rust;

· by est31 was closed on May 24, 2025

· 

1.89.0

Make #[cfg(version)] respect RUSTC_OVERRIDE_VERSION_STRING

A-attributesArea: Attributes (`#[…]`, `#![…]`)Area: Attributes (`#[…]`, `#![…]`)

F-cfg_version`#![feature(cfg_version)]``#![feature(cfg_version)]`

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Merged (completed).

rust-lang/rustnumber 141413

#141413 In rust-lang/rust;

· by est31 was closed on May 25, 2025

· 

1.89.0

Stabilize <code>#[cfg(version(...))]</code>

A-attributesArea: Attributes (`#[…]`, `#![…]`)Area: Attributes (`#[…]`, `#![…]`)

F-cfg_version`#![feature(cfg_version)]``#![feature(cfg_version)]`

I-lang-nominatedNominated for discussion during a lang team meeting.Nominated for discussion during a lang team meeting.

needs-fcpThis change is insta-stable, or significant enough to need a team FCP to proceed.This change is insta-stable, or significant enough to need a team FCP to proceed.

P-lang-drag-1Lang team prioritization drag level 1. https://rust-lang.zulipchat.com/#narrow/channel/410516-t-langLang team prioritization drag level 1. https://rust-lang.zulipchat.com/#narrow/channel/410516-t-lang

S-waiting-on-documentationStatus: Waiting on approved PRs to documentation before mergingStatus: Waiting on approved PRs to documentation before merging

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

T-langRelevant to the language teamRelevant to the language team

Status: Closed (abandoned).

rust-lang/rustnumber 141137

#141137 In rust-lang/rust;

· by est31 was closed on May 22, 2025

Add match guard let chain drop order and scoping tests

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Merged (completed).

rust-lang/rustnumber 140981

#140981 In rust-lang/rust;

· by est31 was closed on May 21, 2025

· 

1.89.0

Remove #![feature(let_chains)] from library and src/librustdoc

A-run-makeArea: port run-make Makefiles to rmake.rsArea: port run-make Makefiles to rmake.rs

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

T-libsRelevant to the library team, which will review and decide on the PR/issue.Relevant to the library team, which will review and decide on the PR/issue.

T-rustdocRelevant to the rustdoc team, which will review and decide on the PR/issue.Relevant to the rustdoc team, which will review and decide on the PR/issue.

Status: Merged (completed).

rust-lang/rustnumber 140966

#140966 In rust-lang/rust;

· by est31 was closed on May 18, 2025

· 

1.89.0

Update the edition guide for let chains

beta-acceptedAccepted for backporting to the compiler in the beta channel.Accepted for backporting to the compiler in the beta channel.

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

Status: Merged (completed).

rust-lang/rustnumber 140852

#140852 In rust-lang/rust;

· by est31 was closed on May 10, 2025

· 

1.88.0

Allow while let chains on all editions

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.

needs-fcpThis change is insta-stable, or significant enough to need a team FCP to proceed.This change is insta-stable, or significant enough to need a team FCP to proceed.

S-blockedStatus: Blocked on something else such as an RFC or other implementation work.Status: Blocked on something else such as an RFC or other implementation work.

S-waiting-on-concernsStatus: Awaiting concerns to be addressed by the authorStatus: Awaiting concerns to be addressed by the author

S-waiting-on-fcpStatus: PR is in FCP and is awaiting for FCP to complete.Status: PR is in FCP and is awaiting for FCP to complete.

T-langRelevant to the language teamRelevant to the language team

Status: Closed (abandoned).

rust-lang/rustnumber 140204

#140204 In rust-lang/rust;

· by est31 was closed on Sep 15, 2025

Make #![feature(let_chains)] bootstrap conditional in compiler/

A-attributesArea: Attributes (`#[…]`, `#![…]`)Area: Attributes (`#[…]`, `#![…]`)

A-query-systemArea: The rustc query system (https://rustc-dev-guide.rust-lang.org/query.html)Area: The rustc query system (https://rustc-dev-guide.rust-lang.org/query.html)

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Merged (completed).

rust-lang/rustnumber 140202

#140202 In rust-lang/rust;

· by est31 was closed on Apr 25, 2025

· 

1.88.0

Let chains tests

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Merged (completed).

rust-lang/rustnumber 133093

#133093 In rust-lang/rust;

· by est31 was closed on Nov 17, 2024

· 

1.84.0

Stabilize let chains in the 2024 edition

A-edition-2024Area: The 2024 editionArea: The 2024 edition

disposition-mergeThis issue / PR is in PFCP or FCP with a disposition to merge it.This issue / PR is in PFCP or FCP with a disposition to merge it.

F-let_chains`#![feature(let_chains)]``#![feature(let_chains)]`

finished-final-comment-periodThe final comment period is finished for this PR / Issue.The final comment period is finished for this PR / Issue.

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.

merged-by-borsThis PR was explicitly merged by bors.This PR was explicitly merged by bors.

relnotesMarks issues that should be documented in the release notes of the next release.Marks issues that should be documented in the release notes of the next release.

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-langRelevant to the language teamRelevant to the language team

Status: Merged (completed).

rust-lang/rustnumber 132833

#132833 In rust-lang/rust;

· by est31 was closed on Apr 22, 2025

· 

1.88.0

Additional tests to ensure let is rejected during parsing

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Merged (completed).

rust-lang/rustnumber 132828

#132828 In rust-lang/rust;

· by est31 was closed on Nov 10, 2024

· 

1.84.0