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Draft release notes for 1.87
#140133 opened Apr 21, 2025 by BoxyUwU
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Issues list

Free type aliases should not require all generic parameters to be used A-variance Area: Variance (https://doc.rust-lang.org/nomicon/subtyping.html) C-bug Category: This is a bug. F-lazy_type_alias `#![feature(lazy_type_alias)]` T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-types Relevant to the types team, which will review and decide on the PR/issue.
#140230 opened Apr 24, 2025 by BoxyUwU
11
ICE: mid > len C-bug Category: This is a bug. F-lazy_type_alias `#![feature(lazy_type_alias)]` F-where_clause_attrs `#![feature(where_clause_attrs)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#138010 opened Mar 4, 2025 by matthiaskrgr
1
@stuuupidcat
4
crash: lazy type alias: stack overflow C-bug Category: This is a bug. F-lazy_type_alias `#![feature(lazy_type_alias)]` I-crash Issue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#131994 opened Oct 21, 2024 by matthiaskrgr
1
ICE: Failed to normalize Alias(Weak, AliasTy { with feature(lazy_type_alias) C-bug Category: This is a bug. F-lazy_type_alias `#![feature(lazy_type_alias)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-incomplete-features This issue requires the use of incomplete features. S-bug-has-test Status: This bug is tracked inside the repo by a `known-bug` test. S-has-bisection Status: a bisection has been found for this issue T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#127351 opened Jul 5, 2024 by Naserume
2
Treat weak alias types more like ADTs when computing implied bounds A-implied-bounds Area: Implied bounds / inferred outlives-bounds F-lazy_type_alias `#![feature(lazy_type_alias)]` S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-types Relevant to the types team, which will review and decide on the PR/issue.
#122340 opened Mar 11, 2024 by fmease • Draft
@oli-obk
14
lazy_type_alias: trait bound no longer satisified C-bug Category: This is a bug. F-lazy_type_alias `#![feature(lazy_type_alias)]` fixed-by-next-solver Fixed by the next-generation trait solver, `-Znext-solver`. requires-nightly This issue requires a nightly compiler in some way. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#114218 opened Jul 29, 2023 by matthiaskrgr
5
lazy_type_alias: type is forbidden as the type of a const generic parameter C-bug Category: This is a bug. F-lazy_type_alias `#![feature(lazy_type_alias)]` requires-nightly This issue requires a nightly compiler in some way. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#114217 opened Jul 29, 2023 by matthiaskrgr
1
@GuillaumeGomez
2
ICE: InstanceDef::Virtual (Virtual(DefId(..))) is for direct calls only lazy_type_alias + mono items C-bug Category: This is a bug. F-lazy_type_alias `#![feature(lazy_type_alias)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-nightly This issue requires a nightly compiler in some way. S-bug-has-test Status: This bug is tracked inside the repo by a `known-bug` test. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#114198 opened Jul 29, 2023 by matthiaskrgr
3
Tracking issue for lazy type aliases A-maybe-future-edition Something we may consider for a future edition. B-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 F-lazy_type_alias `#![feature(lazy_type_alias)]` S-tracking-impl-incomplete Status: The implementation is incomplete. S-tracking-needs-migration-lint Status: This item needs a migration lint. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-types Relevant to the types team, which will review and decide on the PR/issue.
#112792 opened Jun 19, 2023 by GuillaumeGomez
2 of 6 tasks
@fmease
5
ProTip! What’s not been updated in a month: updated:<2025-04-05.