should `deno lint` work without deno.json?

I have a file

index.js

index.js

with the following code

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

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