Issue with hidden field and multi definition list?

[cueckoo]

Originally opened by @eonpatapon in cuelang/cue#417

#A: {
	a: string
}

#B: {
	_b: string
}

#X: #A | #B

l: [...#X]

l: [
	{_b: "bar"}
]

 cue export test.cue
l.0: cannot convert incomplete value "(C{a: string, _b: \"bar\"} | C{_b: (string & \"bar\")})" to JSON:
    ./test.cue:1:5
    ./test.cue:11:8
    ./test.cue:14:2

#B: {
	_b: string
}

l: [...#B]

l: [
	{_b: "bar"}
]

 cue export test.cue
{
    "l": [
        {}
    ]
}

[cueckoo]

Original reply by @mpvl in cuelang/cue#417 (comment)

This is a bug. I can confirm this is fixed in the new evaluator. I'll convert this to an issue.

The core evaluator is now passing the vast majority of tests, but has a few small kinks to be ironed out. Getting closer and closer though!

[cueckoo]

Original reply by @eonpatapon in cuelang/cue#417 (comment)

Great ! Thanks @mpvl