cue vet on empty file

[hjet]

Consider the following example:

test.cue

#Config: {
  num: int
}

test0.json (empty file, or file containing whitespace only)

cue vet test.cue test0.json -d '#Config'

This validates succesfully.

Then
test1.json

{}

num: incomplete value int:
    ./test.cue:2:10

Should test0 report a validation error? Is this expected?

Thank you 🙏

[mvdan]

The testscript below represents what you describe above:

exec cue vet schema.cue data.json -d '#Config'

-- schema.cue --
#Config: {
	num: int
}
-- data.json --

Luckily, I also discovered this bug recently while investigating a different issue, and the bug got resolved in master in https://review.gerrithub.io/c/cue-lang/cue/+/1198874 - this fix is included in the latest release candidate. In short, we used to parse .json files as if they were .jsonl, and an empty .json file was then incorrectly decoded as a stream of zero values - which cue vet treated as a no-op.

[hjet]

Thank you!