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Issues: rust-lang/rust

Draft release notes for 1.88.0
#141598 opened May 26, 2025 by Mark-Simulacrum
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Issues list

ICE：called Option::unwrap() on a None value A-async-await Area: Async & Await A-const-prop Area: Constant propagation 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-async_drop `#![feature(async_drop)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-incomplete-features This issue requires the use of incomplete features. 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.
#140469 opened Apr 29, 2025 by sososopy
3
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: rustc panicked at compiler\rustc_middle\src\mir\interpret\queries.rs:104:13 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-min_generic_const_args `#![feature(min_generic_const_args)]` 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.
#138710 opened Mar 19, 2025 by sososopy
1
ICE：type parameter B/#1 (B/#1/1) out of range when instantiating, args=[Foo<A/#0, B/#1>] 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-inherent_associated_types `#![feature(inherent_associated_types)]` F-min_generic_const_args `#![feature(min_generic_const_args)]` 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.
#138227 opened Mar 8, 2025 by sososopy
@Absobel
3
ICE：expected const for N/#0 (N/#0/0) but found Type(A<N/#0>) when instantiating args=[A<N/#0>] 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-inherent_associated_types `#![feature(inherent_associated_types)]` F-min_generic_const_args `#![feature(min_generic_const_args)]` 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.
#138226 opened Mar 8, 2025 by sososopy
@Absobel
3
ICE: entered unreachable code: FieldsShape::offset: Primitives have no fields -Zvalidate-mir Unstable option: MIR validation A-mir-opt Area: MIR optimizations A-mir-opt-inlining Area: MIR inlining 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. 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.
#133624 opened Nov 29, 2024 by matthiaskrgr
5
Add a run-make test that checks our core::ffi::c_* types against Clang A-FFI Area: Foreign function interface (FFI) A-testsuite Area: The testsuite used to check the correctness of rustc E-hard Call for participation: Hard difficulty. Experience needed to fix: A lot. E-needs-design This issue needs exploration and design to see how and if we can fix/implement it E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#133058 opened Nov 15, 2024 by tgross35
@ricci009
6
Add a regression test for #132587 A-parser Area: The lexing & parsing of Rust source code to an AST A-proc-macros Area: Procedural macros C-bug Category: This is a bug. E-medium Call for participation: Medium difficulty. Experience needed to fix: Intermediate. E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#132727 opened Nov 7, 2024 by jieyouxu
1
5
Inefficient implementation of PartialEq for nested (fieldless) enums A-codegen Area: Code generation A-enum Area: Enums (discriminated unions, or more generally ADTs (algebraic data types)) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. I-heavy Issue: Problems and improvements with respect to binary size of generated code. I-slow Issue: Problems and improvements with respect to performance of generated code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#132628 opened Nov 5, 2024 by zaneduffield
@dianqk
12
ICE: assertion failed: !t.has_escaping_bound_vars()' 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-non_lifetime_binders `#![feature(non_lifetime_binders)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-debug-assertions This issue requires a build of rustc or tooling with debug-assertions in some way 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.
#132055 opened Oct 23, 2024 by matthiaskrgr
1
1
Optimizer regression in Rust nightly A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. 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. P-medium Medium priority regression-from-stable-to-stable Performance or correctness regression from one stable version to another. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#131162 opened Oct 2, 2024 by Coder-256 1.82.0
3
Slow code generated for _mm256_mulhi_epi16 A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. I-slow Issue: Problems and improvements with respect to performance of generated code. P-medium Medium priority regression-untriaged Untriaged performance or correctness regression.
#130782 opened Sep 24, 2024 by turalcar
6
slice::Iter + max on array: Regression since Rust 1.65 (LLVM 15) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. 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. I-slow Issue: Problems and improvements with respect to performance of generated code. llvm-fixed-upstream Issue expected to be fixed by the next major LLVM upgrade, or backported fixes P-low Low priority regression-from-stable-to-stable Performance or correctness regression from one stable version to another. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#129583 opened Aug 25, 2024 by seritools
8
regression: overflow evaluating the requirement E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. P-medium Medium priority regression-from-stable-to-stable Performance or correctness regression from one stable version to another. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#128887 opened Aug 9, 2024 by BoxyUwU 1.81.0
26
ICE: assertion failed: layout.is_sized() with feature(associated_const_equality) A-layout Area: Memory layout of types 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-associated_const_equality `#![feature(associated_const_equality)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ 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.
#127643 opened Jul 12, 2024 by Naserume
1
@workingjubilee
2
[const_closures, const_mut_refs, effects] thread 'rustc' panicked at rustc_middle/src/ty/util.rs:945:22: ConstContext::Maybe must have host effect param 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-const_closures `#![feature(const_closures)]` F-const_mut_refs `#![feature(const_mut_refs)]` F-const_trait_impl `#![feature(const_trait_impl)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-incomplete-features This issue requires the use of incomplete features. 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.
#125866 opened Jun 1, 2024 by gendx
2
ICE: offset of not-statically-aligned field (...) cannot be computed statically in rustc_middle/src/ty/layout.rs 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-offset_of `#![feature(offset_of)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ 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.
#125805 opened May 31, 2024 by cushionbadak
6
ICE: cannot convert '{erased} to a region vid 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-adt_const_params `#![feature(adt_const_params)]` F-generic_const_exprs `#![feature(generic_const_exprs)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ 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.
#125564 opened May 26, 2024 by matthiaskrgr
6
Should have a stack-probe test that doesn't need std's overflow handler A-testsuite Area: The testsuite used to check the correctness of rustc C-enhancement Category: An issue proposing an enhancement or a PR with one. E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#125390 opened May 22, 2024 by workingjubilee
ICE: type variables should not be hashed? A-incr-comp Area: Incremental compilation 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. 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.
#123953 opened Apr 15, 2024 by matthiaskrgr
2
Redundant instructions involving indexing with bools A-codegen Area: Code generation A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. I-heavy Issue: Problems and improvements with respect to binary size of generated code. I-slow Issue: Problems and improvements with respect to performance of generated code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#123216 opened Mar 30, 2024 by alion02
1
1
ICE: const variables should not be hashed: ?0c A-incr-comp Area: Incremental compilation 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. 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.
#122214 opened Mar 8, 2024 by matthiaskrgr
1
Unable to compile rust for riscv32imc-unknown-none-elf with clang 19.0.0git 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. O-riscv Target: RISC-V architecture T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)
#121371 opened Feb 21, 2024 by erickt
4
rust libs are not reproducible from 1.75 A-metadata Area: Crate metadata A-reproducibility Area: Reproducible / deterministic builds 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. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#120825 opened Feb 9, 2024 by sundeep-kokkonda
22
Multiple bounds checking elision failures A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-mir-opt Area: MIR optimizations C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. I-slow Issue: Problems and improvements with respect to performance of generated code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#120433 opened Jan 27, 2024 by SUPERCILEX
2
ProTip! no:milestone will show everything without a milestone.