Roc crashed with:

    Integer multiplication overflowed!

Here is the call stack that led to the crash:

51ec4311b59c766533f74e3af7392564bb9f14b6 - Swap Dict implementation to ankerl dense unordered

app "dict"
    packages {
        pf: "https://github.com/roc-lang/basic-cli/releases/download/0.7.0/bkGby8jb0tmZYsy2hg1E_B2QrCgcSTxdUlHtETwm5m4.tar.br",
    }
    imports [
        pf.Stdout,
        pf.Stderr,
        pf.File,
        pf.Path,
        pf.Task.{ Task },
    ]
    provides [main] to pf

main =

    list = [({x: 2, y: 0}, 16),
        ({x: 3, y: 0}, 1),
        ({x: 4, y: 0}, 2),
        ({x: 4, y: 1}, 3),
        ({x: 3, y: 1}, 4),
        ({x: 3, y: 2}, 5),
        ({x: 3, y: 3}, 6),
        ({x: 3, y: 4}, 7),
        ({x: 2, y: 4}, 8),
        ({x: 2, y: 3}, 9),
        ({x: 1, y: 3}, 10),
        ({x: 0, y: 3}, 11),
        ({x: 0, y: 2}, 12),
        ({x: 1, y: 2}, 13),
        ({x: 1, y: 1}, 14),
        ({x: 2, y: 1}, 15),
        ({x: 2, y: 0}, 16),
        ({x: 2, y: 1}, 1),
        ({x: 1, y: 1}, 2),
        ({x: 1, y: 2}, 3),
        ({x: 0, y: 2}, 4),
        ({x: 0, y: 3}, 5),
        ({x: 1, y: 3}, 6),
        ({x: 2, y: 3}, 7),
        ({x: 2, y: 4}, 8),
        ({x: 3, y: 4}, 9),
        ({x: 3, y: 3}, 10),
        ({x: 3, y: 2}, 11),
        ({x: 3, y: 1}, 12),
        ({x: 4, y: 1}, 13),
        ({x: 4, y: 0}, 14),
        ({x: 3, y: 0}, 15)]

    a = List.walk list (Dict.empty {}) \acc, (k, v) ->
        Dict.update acc k \val ->
            when val is
                Present p -> Present (if v < p then v else p)
                Missing -> Present v


    Stdout.line "res: \(Num.toStr (Dict.len a))"