rust-lang / rust-lang/rust-analyzer
Using a trait as a bound on a on a associated type of a sub-trait causes MEMORY LEAK
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Broken Window
C-bug
- Dominant language
- Rust
- Stars
- 16.9k
- Forks
- 2.2k
- Avg merge
- 1d 12h
- Merged PRs (30d)
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Description
rust-analyzer version: 0.3.2845-standalone (f1297b2111 2026-03-29)
rustc version: rustc 1.92.0 (ded5c06cf 2025-12-08)
editor or extension: VSCode for windows 1.114.0
settings: unmodified/default
code snippet to reproduce:
trait SubTrait {
type SubType;
}
trait SuperTrait: SubTrait<SubType: SuperTrait> {}
Run Rust Analyzer over the included code and watch as it consumes your RAM.
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
Use the provided Rust trait snippet as the reproduction and run rust-analyzer while monitoring memory usage. Trace how this associated-type bound is processed, then verify that analyzing the snippet no longer causes unbounded memory growth.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- compilers, performance
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Clearly specified
- Newbie friendliness
- 48/100