rust-lang / rust-lang/rust-clippy

no_effect lint should also lint calls to const_fn where the result is unused

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A-lint
Dominant language
Rust
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Description

Vec::new();

is an example (soon at least)

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the no_effect lint entry point and its existing tests, then inspect how calls to const_fn are currently handled. Add coverage for an unused Vec::new() call and confirm that the lint reports it while preserving existing behavior.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
devtools
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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