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Issues list

Make trait aliases eligible generic containers wrt. ambient object lifetime defaults A-dyn-trait Area: trait objects, vtable layout A-lifetimes Area: Lifetimes / regions C-bug Category: This is a bug. F-trait_alias `#![feature(trait_alias)]` S-blocked Status: Blocked on something else such as an RFC or other implementation work. T-types Relevant to the types team, which will review and decide on the PR/issue.
#140710 opened May 6, 2025 by fmease
@fmease
ICE: encountered a fresh type during canonicalization A-dyn-trait Area: trait objects, vtable layout C-bug Category: This is a bug. E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. F-trait_alias `#![feature(trait_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-has-bisection Status: A bisection has been found for this issue S-has-mcve Status: A Minimal Complete and Verifiable Example has been found for this issue 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.
#138891 opened Mar 24, 2025 by matthiaskrgr
@compiler-errors
3
ICE: args not compatible with generics for .. C-bug Category: This is a bug. F-generic_const_exprs `#![feature(generic_const_exprs)]` F-trait_alias `#![feature(trait_alias)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ P-low Low priority requires-debug-assertions This issue requires a build of rustc or tooling with debug-assertions in some way requires-incomplete-features This issue requires the use of incomplete features. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#137514 opened Feb 24, 2025 by matthiaskrgr
2
RFC #1733 (Trait Aliases): use of lifetime parameter in trait alias not detected A-dyn-trait Area: trait objects, vtable layout A-lifetimes Area: Lifetimes / regions C-bug Category: This is a bug. F-trait_alias `#![feature(trait_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.
#127725 opened Jul 14, 2024 by ilonachan
2
Compiler wants to add bound which already exists to generic. A-associated-items Area: Associated items (types, constants & functions) A-diagnostics Area: Messages for errors, warnings, and lints A-trait-system Area: Trait system C-bug Category: This is a bug. F-trait_alias `#![feature(trait_alias)]` fixed-by-next-solver Fixed by the next-generation trait solver, `-Znext-solver`. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#123513 opened Apr 5, 2024 by meltah
3
Error in specialization type checking when using trait aliases A-specialization Area: Trait impl specialization C-bug Category: This is a bug. F-specialization `#![feature(specialization)]` F-trait_alias `#![feature(trait_alias)]` requires-nightly This issue requires a nightly compiler in some way.
#74809 opened Jul 27, 2020 by jsmith628
Parameter usage is not properly propagated through trait aliases C-bug Category: This is a bug. F-trait_alias `#![feature(trait_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. T-types Relevant to the types team, which will review and decide on the PR/issue.
#74093 opened Jul 6, 2020 by vandenheuvel
1
The bounds information of associated types is not propagated correctly when used with trait aliases. A-trait-system Area: Trait system C-bug Category: This is a bug. F-trait_alias `#![feature(trait_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. T-lang Relevant to the language team
#68210 opened Jan 14, 2020 by wdanilo
5
Fix trait_ref_to_existential as trait aliases is stabilized A-dyn-compatibility Area: Dyn compatibility (formerly: object safety) A-dyn-trait Area: trait objects, vtable layout C-bug Category: This is a bug. F-trait_alias `#![feature(trait_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. T-types Relevant to the types team, which will review and decide on the PR/issue.
#66420 opened Nov 14, 2019 by estebank
Tracking issue for trait aliases A-trait-system Area: Trait system B-RFC-approved Blocker: Approved by a merged RFC but not yet implemented. 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-trait_alias `#![feature(trait_alias)]` S-tracking-needs-summary Status: It's hard to tell what's been done and what hasn't! Someone should do some investigation. T-lang Relevant to the language team
#41517 opened Apr 24, 2017 by withoutboats
5 of 13 tasks
122
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