main is not found
------------ desugared source code
l = _rhs (HNil : HNil : HNil : HNil : [])

value = _rhs (concatMap (\(a :: _) -> a : []) l)
------------ trace
l :: [()]
value :: [()]
------------ tooltips
testdata/language-features/basic-list/listcomp02.lc 1:1-1:2
    [()]
testdata/language-features/basic-list/listcomp02.lc 1:5-1:18
    [()]
testdata/language-features/basic-list/listcomp02.lc 1:6-1:8
    ()
testdata/language-features/basic-list/listcomp02.lc 1:9-1:11
    ()
testdata/language-features/basic-list/listcomp02.lc 1:9-1:17
    [()]
testdata/language-features/basic-list/listcomp02.lc 1:12-1:14
    ()
testdata/language-features/basic-list/listcomp02.lc 1:12-1:17
    [()]
testdata/language-features/basic-list/listcomp02.lc 1:15-1:17
    () | [()]
testdata/language-features/basic-list/listcomp02.lc 2:1-2:6
    [()]
testdata/language-features/basic-list/listcomp02.lc 2:9-2:21
    [()]
testdata/language-features/basic-list/listcomp02.lc 2:10-2:11
    _d | [_b]
testdata/language-features/basic-list/listcomp02.lc 2:19-2:20
    [()]