should `deno lint` work without deno.json?

I have a file

index.js

index.js

index.js

index.js with the following code

var foo = 'bar

var foo = 'bar

var foo = 'bar

var foo = 'bar …obviously broken. Running

deno lint

deno lint

reports 'checked two files' but no error is given. running

deno fmt

deno fmt

deno fmt

deno fmt fixes the file…which is neat…but I want to fail a build if the lint fails.