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Open
Closed
Tracking Issue for <code>target_feature_inline_always</code>
B-experimental
Blocker: In-tree experiment; RFC pending, not yet approved or unneeded (requires FCP to stabilize).
Blocker: In-tree experiment; RFC pending, not yet approved or unneeded (requires FCP to stabilize).
C-tracking-issue
Category: An issue tracking the progress of sth. like the implementation of an RFC
Category: An issue tracking the progress of sth. like the implementation of an RFC
S-tracking-impl-incomplete
Status: The implementation is incomplete.
Status: The implementation is incomplete.
T-lang
Relevant to the language team
Relevant to the language team
Status: Open.
#145574
In rust-lang/rust;
·
davidtwco
opened
on Aug 18, 2025
Tracking issue for MCP 861: Make the UI test suite more amenable to multiple editions
A-compiletest
Area: The compiletest test runner
Area: The compiletest test runner
B-MCP-approved
Blocker: Approved by an accepted MCP but not yet fully implemented.
Blocker: Approved by an accepted MCP but not yet fully implemented.
C-tracking-issue
Category: An issue tracking the progress of sth. like the implementation of an RFC
Category: An issue tracking the progress of sth. like the implementation of an RFC
S-tracking-impl-incomplete
Status: The implementation is incomplete.
Status: The implementation is incomplete.
T-compiler
Relevant 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: Open.
#145364
In rust-lang/rust;
·
fmease
opened
on Aug 13, 2025
Tracking Issue for Sized Hierarchy
B-experimental
Blocker: In-tree experiment; RFC pending, not yet approved or unneeded (requires FCP to stabilize).
Blocker: In-tree experiment; RFC pending, not yet approved or unneeded (requires FCP to stabilize).
C-tracking-issue
Category: An issue tracking the progress of sth. like the implementation of an RFC
Category: An issue tracking the progress of sth. like the implementation of an RFC
F-sized_hierarchy
`#![feature(sized_hierarchy)]`
`#![feature(sized_hierarchy)]`
S-tracking-impl-incomplete
Status: The implementation is incomplete.
Status: The implementation is incomplete.
T-lang
Relevant to the language team
Relevant to the language team
Status: Open.
Tracking Issue
#144404
In rust-lang/rust;
·
davidtwco
opened
on Jul 24, 2025
Tracking Issue for <code>peekable_next_if_map</code>
C-tracking-issue
Category: An issue tracking the progress of sth. like the implementation of an RFC
Category: An issue tracking the progress of sth. like the implementation of an RFC
S-tracking-impl-incomplete
Status: The implementation is incomplete.
Status: The implementation is incomplete.
T-libs-api
Relevant to the library API team, which will review and decide on the PR/issue.
Relevant to the library API team, which will review and decide on the PR/issue.
Status: Open.
Tracking Issue
#143702
In rust-lang/rust;
·
kennytm
opened
on Jul 9, 2025
Tracking Issue for -Z crate-attr
-Zcrate-attr
Unstable option: -Zcrate-attr
Unstable option: -Zcrate-attr
A-CLI
Area: Command-line interface (CLI) to the compiler
Area: Command-line interface (CLI) to the compiler
B-RFC-approved
Blocker: Approved by a merged RFC but not yet implemented.
Blocker: Approved by a merged RFC but not yet implemented.
C-tracking-issue
Category: An issue tracking the progress of sth. like the implementation of an RFC
Category: An issue tracking the progress of sth. like the implementation of an RFC
S-tracking-impl-incomplete
Status: The implementation is incomplete.
Status: The implementation is incomplete.
T-compiler
Relevant 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: Open.
#138287
In rust-lang/rust;
·
jyn514
opened
on Mar 9, 2025
Tracking Issue for <code>frontmatter</code>
B-RFC-approved
Blocker: Approved by a merged RFC but not yet implemented.
Blocker: Approved by a merged RFC but not yet implemented.
B-unstable
Blocker: Implemented in the nightly compiler and unstable.
Blocker: Implemented in the nightly compiler and unstable.
C-tracking-issue
Category: An issue tracking the progress of sth. like the implementation of an RFC
Category: An issue tracking the progress of sth. like the implementation of an RFC
F-frontmatter
`#![feature(frontmatter)]`
`#![feature(frontmatter)]`
S-tracking-impl-incomplete
Status: The implementation is incomplete.
Status: The implementation is incomplete.
T-cargo
Relevant to the cargo team, which will review and decide on the PR/issue.
Relevant to the cargo team, which will review and decide on the PR/issue.
T-compiler
Relevant 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-lang
Relevant to the language team
Relevant to the language team
T-rustdoc
Relevant 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: Open.
#136889
In rust-lang/rust;
·
epage
opened
on Feb 11, 2025
Tracking issue for RFC 3637: Guard patterns
B-RFC-approved
Blocker: Approved by a merged RFC but not yet implemented.
Blocker: Approved by a merged RFC but not yet implemented.
C-tracking-issue
Category: An issue tracking the progress of sth. like the implementation of an RFC
Category: An issue tracking the progress of sth. like the implementation of an RFC
F-guard_patterns
`#![feature(guard_patterns)]`
`#![feature(guard_patterns)]`
S-tracking-impl-incomplete
Status: The implementation is incomplete.
Status: The implementation is incomplete.
T-lang
Relevant to the language team
Relevant to the language team
Status: Open.
Tracking Issue
#129967
In rust-lang/rust;
·
traviscross
opened
on Sep 4, 2024
Tracking issue for migrating from Glacier to compiletest ICE/crash tracking
A-compiletest
Area: The compiletest test runner
Area: The compiletest test runner
A-testsuite
Area: The testsuite used to check the correctness of rustc
Area: The testsuite used to check the correctness of rustc
C-tracking-issue
Category: An issue tracking the progress of sth. like the implementation of an RFC
Category: An issue tracking the progress of sth. like the implementation of an RFC
S-tracking-impl-incomplete
Status: The implementation is incomplete.
Status: The implementation is incomplete.
T-compiler
Relevant 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: Open.
#125459
In rust-lang/rust;
·
fmease
opened
on May 23, 2024
Tracking implementation for MC/DC
A-code-coverage
Area: Source-based code coverage (-Cinstrument-coverage)
Area: Source-based code coverage (-Cinstrument-coverage)
B-unstable
Blocker: Implemented in the nightly compiler and unstable.
Blocker: Implemented in the nightly compiler and unstable.
C-tracking-issue
Category: An issue tracking the progress of sth. like the implementation of an RFC
Category: An issue tracking the progress of sth. like the implementation of an RFC
F-coverage-mcdc
MC/DC coverage via -Cinstrument-coverage with -Zcoverage-options=mcdc
MC/DC coverage via -Cinstrument-coverage with -Zcoverage-options=mcdc
S-tracking-impl-incomplete
Status: The implementation is incomplete.
Status: The implementation is incomplete.
T-compiler
Relevant 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: Open.
#124144
In rust-lang/rust;
·
ZhuUx
opened
on Apr 19, 2024
Tracking Issue for RFC 3550: New range types
A-maybe-future-edition
Something we may consider for a future edition.
Something we may consider for a future edition.
B-RFC-approved
Blocker: Approved by a merged RFC but not yet implemented.
Blocker: Approved by a merged RFC but not yet implemented.
C-tracking-issue
Category: An issue tracking the progress of sth. like the implementation of an RFC
Category: An issue tracking the progress of sth. like the implementation of an RFC
F-new_range
`#![feature(new_range)]`
`#![feature(new_range)]`
S-tracking-impl-incomplete
Status: The implementation is incomplete.
Status: The implementation is incomplete.
S-tracking-needs-documentation
Status: Needs documentation.
Status: Needs documentation.
S-tracking-needs-migration-lint
Status: This item needs a migration lint.
Status: This item needs a migration lint.
S-tracking-unimplemented
Status: The feature has not been implemented.
Status: The feature has not been implemented.
T-lang
Relevant to the language team
Relevant to the language team
T-libs-api
Relevant to the library API team, which will review and decide on the PR/issue.
Relevant to the library API team, which will review and decide on the PR/issue.
Status: Open.
#123741
In rust-lang/rust;
·
traviscross
opened
on Apr 10, 2024
Tracking Issue for postfix match
B-experimental
Blocker: In-tree experiment; RFC pending, not yet approved or unneeded (requires FCP to stabilize).
Blocker: In-tree experiment; RFC pending, not yet approved or unneeded (requires FCP to stabilize).
C-tracking-issue
Category: An issue tracking the progress of sth. like the implementation of an RFC
Category: An issue tracking the progress of sth. like the implementation of an RFC
F-postfix_match
`#![feature(postfix_match)]`
`#![feature(postfix_match)]`
S-tracking-impl-incomplete
Status: The implementation is incomplete.
Status: The implementation is incomplete.
T-lang
Relevant to the language team
Relevant to the language team
Status: Open.
#121618
In rust-lang/rust;
·
RossSmyth
opened
on Feb 26, 2024
Tracking Issue for function delegation (<code>fn_delegation</code>, RFC 3530)
B-experimental
Blocker: In-tree experiment; RFC pending, not yet approved or unneeded (requires FCP to stabilize).
Blocker: In-tree experiment; RFC pending, not yet approved or unneeded (requires FCP to stabilize).
C-tracking-issue
Category: An issue tracking the progress of sth. like the implementation of an RFC
Category: An issue tracking the progress of sth. like the implementation of an RFC
F-fn_delegation
`#![feature(fn_delegation)]`
`#![feature(fn_delegation)]`
S-tracking-impl-incomplete
Status: The implementation is incomplete.
Status: The implementation is incomplete.
T-lang
Relevant to the language team
Relevant to the language team
Status: Open.
#118212
In rust-lang/rust;
·
petrochenkov
opened
on Nov 23, 2023
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