linter: curly set to multi-line triggers false positive on single line else

[MichaelGoff]

What version of Oxlint are you using?

0.15.13

What command did you run?

npx oxlint

What does your .oxlintrc.json config file look like?

{
  "env": {
    "browser": true
  },
  "categories": {
    "correctness": "error"
  },
  "rules": {
    "curly": ["error", "multi-line"]
  }
}

What happened?

The following snippet passes eslint when set to curly: ['error', 'multi-line'] but fails in oxlint.

I expect this single line else to be okay when set to 'multi-line'

  const isIterable = (obj: any) : obj is Iterable<IgnoreRule> => {
    if (obj === null) return false;
    else if (typeof obj === 'string') return false;
    else return typeof value[Symbol.iterator] === 'function';
  };

Oxlint output:

  × eslint(curly): Expected { after 'else'.
    ╭─[src/testFile.ts:88:10]
 87 │     else if (typeof obj === 'string') return false;
 88 │     else return typeof value[Symbol.iterator] === 'function';
    ·          ────────────────────────────────────────────────────
 89 │   };
    ╰────
  help: Replace `return typeof value[Symbol.iterator] === 'function';` with `{return typeof value[Symbol.iterator] === 'function';}`.

[heygsc]

It's a bit strange, I tried testing with or without parentheses in the source code, but both cargo test passed.

[MichaelGoff]

Here's a minimal reproduction https://github.com/MichaelGoff/oxlint-curly-multiline-issue

npx oxlint throws the error

I'm on Windows 10 using Node 22.11.0 if that's relevant.

[heygsc]

mac arm64 + node 22.14.0, Found 0 warnings and 0 errors..

Maybe someone else will try again?