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Issues list

ICE: Failed to normalize Alias(Free, AliasTy { C-bug Category: This is a bug. F-type_alias_impl_trait `#[feature(type_alias_impl_trait)]` 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.
#141380 opened May 22, 2025 by matthiaskrgr
6
[ICE] internal error in match_branches on unicode range pattern C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ P-medium Medium priority regression-from-stable-to-stable Performance or correctness regression from one stable version to another. 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.
#141378 opened May 22, 2025 by giantpand2000
@dianqk
4
feature(frontmatter) rejects frontmatters with dashes with leading spaces A-parser Area: The lexing & parsing of Rust source code to an AST C-bug Category: This is a bug. F-frontmatter `#![feature(frontmatter)]` T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141367 opened May 21, 2025 by epage
Performance problem in for loops with step_by(run-time-variable) C-bug Category: This is a bug. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged.
#141360 opened May 21, 2025 by leonardo-m
1
1.87 build fails with LLVM 19 A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)
#141353 opened May 21, 2025 by bbhtt
4
Debugger step-over runs backward A-debuginfo Area: Debugging information in compiled programs (DWARF, PDB, etc.) C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141344 opened May 21, 2025 by vlad20012
1
4
Possible regression for ui/match/issue-114691.rs C-bug Category: This is a bug. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged.
#141340 opened May 21, 2025 by lewis1revill
async drop cause ICE with broken MIR in Item C-bug Category: This is a bug. E-needs-mcve Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example F-async_drop `#![feature(async_drop)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141327 opened May 21, 2025 by Sherlock-Holo
1
Next solver: ICE: Didn't expect to assemble trait candidate from […] NestedNormalizationGoals A-trait-system Area: Trait system C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ 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. WG-trait-system-refactor The Rustc Trait System Refactor Initiative (-Znext-solver)
#141322 opened May 21, 2025 by Josh194
1
@compiler-errors
1
GVN misunderstands aliasing, can create overlapping assignments (again) A-mir-opt Area: MIR optimizations A-mir-opt-GVN Area: MIR opt Global Value Numbering (GVN) A-rustlantis A miscompilation found by Rustlantis C-bug Category: This is a bug. I-miscompile Issue: Correct Rust code lowers to incorrect machine code I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness P-medium Medium priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141313 opened May 20, 2025 by saethlin
@dianqk
2
When LTO is enabled, miscompiles (x86_64-apple-darwin, at least) and failures to link due to unknown relocation type in switch tables (AArch64 Linux/Android, at least) A-linkage Area: linking into static, shared libraries and binaries C-bug Category: This is a bug. E-needs-bisection Call for participation: This issue needs bisection: https://github.com/rust-lang/cargo-bisect-rustc E-needs-mcve Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. P-critical Critical priority regression-untriaged Untriaged performance or correctness regression. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141306 opened May 20, 2025 by briansmith
7
compiler panic - name of non-Rpitit assoc item C-bug Category: This is a bug. E-needs-mcve Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141304 opened May 20, 2025 by TeamDman
7
Compiler unexpectedly paniced - Ark curves C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ needs-triage This issue may need triage. Remove it if it has been sufficiently triaged.
#141302 opened May 20, 2025 by Sydnie-Shea
1
doc_auto_cfg no longer applies a cfg badge to certain inlined cross-crate re-exported items with a #[cfg] A-cfg Area: `cfg` conditional compilation A-cross-crate-reexports Area: Documentation that has been re-exported from a different crate C-bug Category: This is a bug. F-doc_auto_cfg `#![feature(doc_auto_cfg)]` 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-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#141301 opened May 20, 2025 by epage
6
sys::thread_local::key::tests::destructors fails under x86 Windows 7 A-atomic Area: Atomics, barriers, and sync primitives A-destructors Area: Destructors (`Drop`, …) A-testsuite Area: The testsuite used to check the correctness of rustc A-thread-locals Area: Thread local storage (TLS) C-bug Category: This is a bug. O-windows-7 OS: Windows 7 or Windows Server 2008 R2 or etc. O-windows-msvc Toolchain: MSVC, Operating system: Windows O-x86_32 Target: x86 processors, 32 bit (like i686-*) (IA-32) P-low Low priority regression-from-stable-to-beta Performance or correctness regression from stable to beta. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#141300 opened May 20, 2025 by PaulDance
6
Slow and memory-intensive compilation with debug symbols A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-slow Issue: Problems and improvements with respect to performance of generated code. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged.
#141297 opened May 20, 2025 by speshuric
6
ICE: late-bound type parameter not allowed on function pointer types C-bug Category: This is a bug. F-unsafe_binders `#![feature(unsafe_binders)]` 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.
#141293 opened May 20, 2025 by matthiaskrgr
3
1.87 Regression: s390x-unknown-linux-gnu release build gets stuck C-bug Category: This is a bug. E-needs-mcve Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example I-prioritize Issue: Indicates that prioritization has been requested for this issue. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. O-SystemZ Target: SystemZ processors (s390x) regression-untriaged Untriaged performance or correctness regression. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141287 opened May 20, 2025 by konstin
6
Diverging expression not detected inside a while condition C-bug Category: This is a bug. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. T-lang Relevant to the language team, which will review and decide on the PR/issue.
#141274 opened May 20, 2025 by theemathas
2
Opaque Future Type crashed compiler :) Called Option::unwrap() on a None value C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ S-needs-info Status: The issue lacks details necessary to triage or act on it. S-needs-repro Status: This issue has no reproduction and needs a reproduction to make progress. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141268 opened May 20, 2025 by Token-Thinker
3
We rely on an undocumented property of GetUserProfileDirectoryW C-bug Category: This is a bug. O-windows Operating system: Windows T-libs Relevant to the library team, which will review and decide on the PR/issue.
#141254 opened May 19, 2025 by RalfJung
2
GVN makes an incorrect index access A-mir-opt Area: MIR optimizations A-mir-opt-GVN Area: MIR opt Global Value Numbering (GVN) A-rustlantis A miscompilation found by Rustlantis C-bug Category: This is a bug. I-miscompile Issue: Correct Rust code lowers to incorrect machine code I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness P-high High priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141251 opened May 19, 2025 by dianqk
1
@dianqk
Can't match strings in consts, but can match byte strings in consts A-const-eval Area: Constant evaluation, covers all const contexts (static, const fn, ...) A-patterns Relating to patterns and pattern matching A-str Area: str and String C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141231 opened May 18, 2025 by clarfonthey
2
EarlyOtherwiseBranch can insert storage markers incorrectly, creating use of a dead local A-mir-opt Area: MIR optimizations A-rustlantis A miscompilation found by Rustlantis C-bug Category: This is a bug. I-miscompile Issue: Correct Rust code lowers to incorrect machine code I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness P-medium Medium priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141212 opened May 18, 2025 by saethlin
@dianqk
ICE: overflow evaluating the requirement / impl was matchable against binder but now it is not A-associated-items Area: Associated items (types, constants & functions) A-trait-system Area: Trait system C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. 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 S-has-mcve Status: A Minimal Complete and Verifiable Example has been found for this issue T-types Relevant to the types team, which will review and decide on the PR/issue.
#141124 opened May 17, 2025 by matthiaskrgr
1
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