[INFO] updating cached repository https://github.com/mrchoung/ft_ls
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e06725717fdcc2a358db1fbef684af394f6699ae
[INFO] testing mrchoung/ft_ls against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmrchoung%2Fft_ls" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mrchoung/ft_ls on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/mrchoung/ft_ls
[INFO] finished tweaking git repo https://github.com/mrchoung/ft_ls
[INFO] tweaked toml for git repo https://github.com/mrchoung/ft_ls written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/mrchoung/ft_ls already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] bfb6032a335183dc7fbdd44035e7f232f3840ae438d94ef245b78f0b5577a4e7
[INFO] running `"docker" "start" "-a" "bfb6032a335183dc7fbdd44035e7f232f3840ae438d94ef245b78f0b5577a4e7"`
[INFO] [stderr]    Compiling ft_ls v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0599]: no method named `collect` found for type `bool` in the current scope
[INFO] [stderr]  --> src/main.rs:5:81
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let options: Vec<String> = env::args().map(|option| option.starts_with('-').collect());
[INFO] [stderr]   |                                                                                 ^^^^^^^ method not found in `bool`
[INFO] [stderr]   |
[INFO] [stderr]   = note: the method `collect` exists but the following trait bounds were not satisfied:
[INFO] [stderr]           `&mut bool : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]  --> src/main.rs:5:32
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let options: Vec<String> = env::args().map(|option| option.starts_with('-').collect());
[INFO] [stderr]   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected struct `std::vec::Vec`, found struct `std::iter::Map`
[INFO] [stderr]   |
[INFO] [stderr]   = note: expected type `std::vec::Vec<std::string::String>`
[INFO] [stderr]              found type `std::iter::Map<std::env::Args, _>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: could not compile `ft_ls`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "bfb6032a335183dc7fbdd44035e7f232f3840ae438d94ef245b78f0b5577a4e7"`
[INFO] running `"docker" "rm" "-f" "bfb6032a335183dc7fbdd44035e7f232f3840ae438d94ef245b78f0b5577a4e7"`
[INFO] [stdout] bfb6032a335183dc7fbdd44035e7f232f3840ae438d94ef245b78f0b5577a4e7