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Issues list

Segfault due to impossible_predicates treating A-codegen Area: Code generation C-bug Category: This is a bug. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness P-critical Critical priority WG-trait-system-refactor The Rustc Trait System Refactor Initiative (-Znext-solver)
#141119 opened May 17, 2025 by compiler-errors
1
@compiler-errors
2
ReferencePropagation miscompile that reads uninitialized memory 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 needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. P-medium Medium priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141101 opened May 16, 2025 by saethlin
1
GVN can create overlapping assignments 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.
#141038 opened May 15, 2025 by saethlin
@dianqk
mul_add on *-pc-windows-gnu returns incorrect results A-floating-point Area: Floating point numbers and arithmetic C-bug Category: This is a bug. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness O-windows-gnu Toolchain: GNU, Operating system: Windows P-medium Medium priority 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.
#140515 opened Apr 30, 2025 by beetrees
20
#[target_feature] mismatch on unsafe trait fn vs its impl causes sneaky UB C-bug Category: This is a bug. F-target_feature_11 target feature 1.1 RFC I-lang-radar Items that are on lang's radar and will need eventual work or consideration. I-prioritize Issue: Indicates that prioritization has been requested for this issue. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-lang Relevant to the language team, which will review and decide on the PR/issue.
#139368 opened Apr 4, 2025 by obi1kenobi
22
core::ptr::replace implementation is unsound since Rust 1.80 C-bug Category: This is a bug. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness T-lang Relevant to the language team, which will review and decide on the PR/issue. T-opsem Relevant to the opsem team
#138351 opened Mar 11, 2025 by orlp
2
CopyProp miscompilation when src is moved more than once A-mir-opt Area: MIR optimizations 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 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.
#137936 opened Mar 3, 2025 by tmiasko
2
Clarifying the behavior of #[rustc_nounwind] at trait methods A-dyn-trait Area: trait objects, vtable layout A-lang-item Area: Language items F-rustc_attrs Internal rustc attributes gated on the `#[rustc_attrs]` feature gate. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#137765 opened Feb 28, 2025 by dianqk
3
Decide what to do about UnsafePinned and safe Pin::as_ref C-bug Category: This is a bug. C-discussion Category: Discussion or questions that doesn't represent real issues. F-unsafe_pinned `#![feature(unsafe_pinned)]` I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness T-lang Relevant to the language team, which will review and decide on the PR/issue. T-opsem Relevant to the opsem team
#137750 opened Feb 27, 2025 by traviscross
3
LLVM nocapture attribute is used incorrectly A-codegen Area: Code generation A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-opsem Relevant to the opsem team
#137668 opened Feb 26, 2025 by tmiasko
1
10
Panic-safety issue with Zip specializations A-iterators Area: Iterators A-specialization Area: Trait impl specialization C-bug Category: This is a bug. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness P-high High priority T-libs Relevant to the library team, which will review and decide on the PR/issue.
#137255 opened Feb 19, 2025 by steffahn
1
@the8472
2
MIR passes do not take into account if an operation is convergent A-mir-opt Area: MIR optimizations 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 O-amdgcn Target: the Radeon 9001XT and such O-NVPTX Target: the NVPTX LLVM backend for running rust on GPUs, https://llvm.org/docs/NVPTXUsage.html T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. WG-mir-opt Working group: MIR optimizations
#137086 opened Feb 15, 2025 by kulst
13
#[thread_local] alignment broken on Windows, GNU ABI A-thread-locals Area: Thread local storage (TLS) C-bug Category: This is a bug. F-thread_local `#![feature(thread_local)]` I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness O-windows-gnu Toolchain: GNU, Operating system: Windows 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.
#135719 opened Jan 19, 2025 by purplesyringa
16
Item-bounds can be used to non-productively prove themselves A-associated-items Area: Associated items (types, constants & functions) I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness P-medium Medium priority 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.
#135246 opened Jan 8, 2025 by lcnr
1
The implementation of InPlaceIterable for Flatten&FlatMap is unsound A-iterators Area: Iterators C-bug Category: This is a bug. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness T-libs Relevant to the library team, which will review and decide on the PR/issue.
#135103 opened Jan 4, 2025 by steffahn
9
Typesystem soundness hole involving cyclically-defined ATIT, and normalization in trait bounds A-associated-items Area: Associated items (types, constants & functions) A-trait-system Area: Trait system A-type-system Area: Type system C-bug Category: This is a bug. I-crash Issue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness P-medium Medium priority T-types Relevant to the types team, which will review and decide on the PR/issue.
#135011 opened Jan 2, 2025 by steffahn
21
When subtyping can switch out trait impls, Pin::new’s check for Target: Unpin becomes insufficient A-pin Area: Pin C-bug Category: This is a bug. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness P-medium Medium priority T-libs-api Relevant to the library API 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.
#134407 opened Dec 17, 2024 by steffahn
12
aarch64-unknown-none-softfloat: ABI unsoundness when enabling "neon" feature A-ABI Area: Concerning the application binary interface (ABI) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-target-feature Area: Enabling/disabling target features like AVX, Neon, etc. C-bug Category: This is a bug. I-prioritize Issue: Indicates that prioritization has been requested for this issue. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness O-AArch64 Armv8-A or later processors in AArch64 mode T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#134375 opened Dec 16, 2024 by RalfJung
1
32
The combination of alloc_error_handler and target_features_11 is unsound C-bug Category: This is a bug. F-target_feature_11 target feature 1.1 RFC I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness 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.
#134234 opened Dec 12, 2024 by veluca93
alloc_error_handler can be an unsafe fn which is then unsoundly invoked C-bug Category: This is a bug. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness 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.
#134225 opened Dec 12, 2024 by RalfJung
Array and Vec's Clone specialization is maybe unsound with conditionally Copy types. A-specialization Area: Trait impl specialization C-bug Category: This is a bug. E-needs-investigation Call for partcipation: This issues needs some investigation to determine current status 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. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#132442 opened Nov 1, 2024 by theemathas
1
28
projecting to assoc type of supertrait that is implemented differently for trait object goes wrong A-associated-items Area: Associated items (types, constants & functions) A-dyn-trait Area: trait objects, vtable layout C-bug Category: This is a bug. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness requires-nightly This issue requires a nightly compiler in some way. T-types Relevant to the types team, which will review and decide on the PR/issue.
#131891 opened Oct 18, 2024 by lukas-code
@compiler-errors
4
-Crelocation-model=rwpi (and possibly others) are unsound due to affecting the ABI C-bug Category: This is a bug. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness O-AArch64 Armv8-A or later processors in AArch64 mode O-Arm Target: 32-bit Arm processors (armv6, armv7, thumb...), including 64-bit Arm in AArch32 state P-medium Medium priority
#131300 opened Oct 5, 2024 by RalfJung
4
Miscompilation: comparing a pointer against all possible addresses returns false A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. 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-low Low priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#130388 opened Sep 15, 2024 by RalfJung
8
-Csoft-float flag is unsound A-ABI Area: Concerning the application binary interface (ABI) A-codegen Area: Code generation A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness O-Arm Target: 32-bit Arm processors (armv6, armv7, thumb...), including 64-bit Arm in AArch32 state P-medium Medium priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#129893 opened Sep 2, 2024 by RalfJung
23
ProTip! What’s not been updated in a month: updated:<2025-04-17.