rust-lang / rust-lang/rust-clippy
huge memory consumption on testcase
Open
Nobody has claimed this yet.
I-ICE
- Dominant language
- Rust
- Stars
- 13.5k
- Forks
- 2.2k
- Avg merge
- 2d 10h
- Merged PRs (30d)
- 32
Description
cc https://github.com/rust-lang/rust-clippy/issues/3142
This was found by running clippy on glacier https://github.com/rust-lang/glacier
./fixed/23600.rs
static V1: [u8; 0xffff_ffff] = [0u8; 0xffff_ffff];
fn main() { V1[0]; }
seems to want to consume all of the systems run when checked with clippy.
clippy 0.0.212 (648e5b9 2019-10-01)
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by running Clippy on fixed/23600.rs, which declares the large static array shown in the issue, and observe its memory use while checking the testcase. Trace the check far enough to identify where the excessive allocation occurs; done means this testcase no longer consumes essentially all system memory when checked with Clippy.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- performance, tooling
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 38/100