cue eval -i bottom.cue
cmp stdout expect-stdout-cue

-- frontmatter.toml --
title = "Bottom / Error"
description = ""

-- text.md --
Specifying duplicate fields with conflicting values results in an error
or bottom.
_Bottom_ is a special value in CUE, denoted `_|_`, that indicates an
error such as conflicting values.
Any error in CUE results in `_|_`.
Logically all errors are equal, although errors may be associated with
metadata such as an error message.

Note that an error is different from `null`: `null` is a valid value,
whereas `_|_` is not.

-- bottom.cue --
a: 4
a: 5

l: [ 1, 2 ]
l: [ 1, 3 ]

list: [0, 1, 2]
val: list[3]

-- expect-stdout-cue --
list: [0, 1, 2]
a: _|_ // conflicting values 4 and 5
l: [1, _|_, // conflicting values 2 and 3
]
val: _|_ // index 3 out of bounds