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Issues list

SIGSEGV: rustc crashed on valid code A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. 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.
#131419 opened Oct 8, 2024 by shao-hua-li
2
non-pub function no longer compiled in debug profile, causing link errors on thumbv7em-none-eabihf with defmt A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. P-high High 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.
#131164 opened Oct 2, 2024 by jonathanpallant 1.82.0
16
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. P-medium Medium 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.
#131162 opened Oct 2, 2024 by Coder-256
2
ICE: rustc interrupted by SIGSEGV while compiling in release mode A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. 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.
#131157 opened Oct 2, 2024 by akhercha
LLVM 20 changes SPARC alignments, breaking some tests A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged.
#131074 opened Sep 30, 2024 by durin42
1
LLVM regression in beta with -Ctarget-feature=-simd128 A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. P-medium Medium priority regression-from-stable-to-beta Performance or correctness regression from stable to beta.
#131031 opened Sep 29, 2024 by DaniPopes
9
tests/debuginfo/macro-stepping.rs remains broken with SingleUseConsts A-debuginfo Area: Debugging information in compiled programs (DWARF, PDB, etc.) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-MIR Area: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.html A-testsuite Area: The testsuite used to check the correctness of rustc C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. WG-debugging Working group: Bad Rust debugging experiences WG-llvm Working group: LLVM backend code generation
#130896 opened Sep 26, 2024 by khuey
Unnecessary loop unrolling to handle tail when tail length has a smaller known size 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 I-slow Issue: Problems and improvements with respect to performance of generated code.
#130795 opened Sep 24, 2024 by okaneco
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 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 P-medium Medium priority regression-untriaged Untriaged performance or correctness regression.
#130782 opened Sep 24, 2024 by turalcar
3
rustc-LLVM ERROR: section size does not fit in a uint32_t A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged.
#130760 opened Sep 23, 2024 by benwis
Does LLVM's quirk of counting in bits matter to us? A-docs Area: documentation for any part of the project, including the compiler, standard library, and tools A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#130683 opened Sep 22, 2024 by workingjubilee
3
Redundant instructions in cloning of bit-wise copyable type A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. P-medium Medium priority regression-untriaged Untriaged performance or correctness regression. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#130592 opened Sep 20, 2024 by CrazyboyQCD
1
Suboptimal codegen for a function that should fold to a constant 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 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.
#130421 opened Sep 16, 2024 by dcci
@deniskilseev
3
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
Rust 1.79 regression: LLVM hang when compiling brotli-decompressor for i686 A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-compiletime Issue: Problems and improvements with respect to compile times. I-prioritize Issue: Indicates that prioritization has been requested for this issue. regression-untriaged Untriaged performance or correctness regression.
#130271 opened Sep 12, 2024 by neivv
3
[BUG] llvm-cov warning mismatched data when impl const fn A-code-coverage Area: Source-based code coverage (-Cinstrument-coverage) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. 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.
#130139 opened Sep 9, 2024 by loynoir
[BUG] llvm-cov warning mismatched data when triple slash safety comment above unsafe fn A-code-coverage Area: Source-based code coverage (-Cinstrument-coverage) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. 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.
#130097 opened Sep 8, 2024 by loynoir
ThreadSanitizer false positive due to missing interceptor for fcntl(fd, F_DUPFD_CLOEXEC, ..) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-sanitizers Area: Sanitizers for correctness and code quality C-bug Category: This is a bug. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#130037 opened Sep 6, 2024 by tmiasko
-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. 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
15
Scalar vector operations can use NEON instructions, which have incorrect subnormal behavior A-floating-point Area: Floating point numbers and arithmetic A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#129853 opened Sep 1, 2024 by RalfJung
Suboptimal Assembly Output from a Modulo on a Power of Two 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 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.
#129795 opened Aug 30, 2024 by Altanis
6
Too long compile time with implementing a trait function A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-compiletime Issue: Problems and improvements with respect to compile times. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#129776 opened Aug 30, 2024 by dalance
@DianQK
4
Large amounts of repeated data in debug info A-debuginfo Area: Debugging information in compiled programs (DWARF, PDB, etc.) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-heavy Issue: Problems and improvements with respect to binary size of generated code.
#129722 opened Aug 29, 2024 by khuey
5
Very long compilation time on Apple Silicon platform A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. I-compiletime Issue: Problems and improvements with respect to compile times. O-AArch64 Armv8-A or later processors in AArch64 mode O-macos Operating system: macOS
#129713 opened Aug 28, 2024 by kika
rustc got SIGSEGV on cargo install sqlx-cli A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ 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.
#129680 opened Aug 28, 2024 by cycle-five
2
ProTip! Exclude everything labeled bug with -label:bug.