app [main!] {
    pf: platform "https://github.com/roc-lang/basic-cli/releases/download/0.19.0/bi5zubJ-_Hva9vxxPq4kNx4WHX6oFs8OP6Ad0tCYlrY.tar.br",
}

import pf.Stdin

parse_record : Str -> List U64
parse_record = |text|
    text |> Str.split_on(" ") |> List.keep_oks Str.to_u64

parse_matrix : Str -> List List U64
parse_matrix = |text|
    text |> Str.split_on("\n") |> List.map parse_record

main! = |_args|
    text = Stdin.read_to_end!({})? |> Str.from_utf8?
    _ = text |> parse_matrix
    Ok {}

thread 'main' panicked at crates/compiler/mono/src/borrow.rs:361:34:
internal error: entered unreachable code:
        No borrow signature for LambdaName { name: `List.keep_oks`, niche: Niche(Captures([])) } layout.

        Tip 1: This can happen when you call a function with fewer arguments than it expects.
        Like `Arg.list!` instead of `Arg.list! {}`.
        Tip 2: `roc check yourfile.roc` can sometimes give you a helpful error.

note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace