What version of Oxlint are you using?

1.6.0

What command did you run?

oxlint

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

see below

What happened?

Given a simple input:

var x = 123

and a valid .oxlintrc.json that disables the unused lint:

{
  "plugins": ["eslint"],
  "rules": {
    "no-unused-vars": "off"
  }
}

you get the expected clean output:

Found 0 warnings and 0 errors.
Finished in 5ms on 2 files using 16 threads

But with a syntax error in the config file (note missing comma after plugins array):

{
  "plugins": ["eslint"]
  "rules": {
    "no-unused-vars": "off"
  }
}

You get the default config:

  ⚠ eslint(no-unused-vars): Variable 'x' is declared but never used. Unused variables should start with a '_'.
   ╭─[test.ts:1:5]
 1 │ var x = 123
   ·     ┬
   ·     ╰── 'x' is declared here
   ╰────
  help: Consider removing this declaration.

Found 1 warning and 0 errors.
Finished in 5ms on 2 files with 87 rules using 16 threads.

I'd expect the output to immediately fail with an "invalid config file" type error, rather than falling back to a default config.