-- in.cue --
import "list"


list1: {
    // Note that Top is not incomplete, only its first element is.
    // We allow FlattenN to proceed and pass on the incomplete values.
    Out1: list.FlattenN(Top , 1)
    Out2: [...] & list.FlattenN(Top , 1)
    Out3: list.FlattenN(Top , 1) & [...]

    // This evaluates to a list with an incomplete element.
    Top: [
        [ for _, F in _Sub { F } ],
    ]

    _Sub: a.b
    a: {} // b does not
}

list2: {
    Out1: list.FlattenN(_Top , 1)
    Out2: [...] & list.FlattenN(_Top , 1)
    Out3: list.FlattenN(_Top , 1) & [...]

    // This evaluates to a list with an incomplete element.
    _Top: [
        for _, F in #Sub { F }
    ]

    #Sub: a.b
    a: {} // b does not
}

value1: {
    a: len('sf' | 'dd')
}

value2: {
    len('sf' | 'dd')
}

-- out/eval --
(struct){
  list1: (struct){
    Out1: (#list){
      0: (_|_){
        // [incomplete] list1._Sub: undefined field b:
        //     ./in.cue:16:13
      }
    }
    Out2: (#list){
      0: (_|_){
        // [incomplete] list1._Sub: undefined field b:
        //     ./in.cue:16:13
      }
    }
    Out3: (#list){
      0: (_|_){
        // [incomplete] list1._Sub: undefined field b:
        //     ./in.cue:16:13
      }
    }
    Top: (#list){
      0: (_|_){
        // [incomplete] list1._Sub: undefined field b:
        //     ./in.cue:16:13
      }
    }
    _Sub: (_|_){
      // [incomplete] list1._Sub: undefined field b:
      //     ./in.cue:16:13
    }
    a: (struct){
    }
  }
  list2: (struct){
    Out1: (_|_){
      // [incomplete] list2.#Sub: undefined field b:
      //     ./in.cue:30:13
    }
    Out2: (_|_){
      // [incomplete] list2.#Sub: undefined field b:
      //     ./in.cue:30:13
    }
    Out3: (_|_){
      // [incomplete] list2.#Sub: undefined field b:
      //     ./in.cue:30:13
    }
    _Top: (_|_){
      // [incomplete] list2.#Sub: undefined field b:
      //     ./in.cue:30:13
    }
    #Sub: (_|_){
      // [incomplete] list2.#Sub: undefined field b:
      //     ./in.cue:30:13
    }
    a: (struct){
    }
  }
  value1: (struct){
    a: (_|_){
      // [incomplete] value1.a: unresolved disjunction 'sf' | 'dd' (type bytes):
      //     ./in.cue:35:8
    }
  }
  value2: (_|_){
    // [incomplete] value2: unresolved disjunction 'sf' | 'dd' (type bytes):
    //     ./in.cue:39:5
  }
}
-- out/compile --
--- in.cue
{
  list1: {
    Out1: 〈import;list〉.FlattenN(〈0;Top〉, 1)
    Out2: ([
      ...,
    ] & 〈import;list〉.FlattenN(〈0;Top〉, 1))
    Out3: (〈import;list〉.FlattenN(〈0;Top〉, 1) & [
      ...,
    ])
    Top: [
      [
        for _, F in 〈0;_Sub〉 {
          〈1;F〉
        },
      ],
    ]
    _Sub: 〈0;a〉.b
    a: {}
  }
  list2: {
    Out1: 〈import;list〉.FlattenN(〈0;_Top〉, 1)
    Out2: ([
      ...,
    ] & 〈import;list〉.FlattenN(〈0;_Top〉, 1))
    Out3: (〈import;list〉.FlattenN(〈0;_Top〉, 1) & [
      ...,
    ])
    _Top: [
      for _, F in 〈0;#Sub〉 {
        〈1;F〉
      },
    ]
    #Sub: 〈0;a〉.b
    a: {}
  }
  value1: {
    a: len(('sf'|'dd'))
  }
  value2: {
    len(('sf'|'dd'))
  }
}