[INFO] updating cached repository mrchoung/ft_ls
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mrchoung/ft_ls
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mrchoung/ft_ls" "work/ex/beta-1.37-6/sources/1.36.0/gh/mrchoung/ft_ls"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/mrchoung/ft_ls'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mrchoung/ft_ls" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mrchoung/ft_ls"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mrchoung/ft_ls'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e06725717fdcc2a358db1fbef684af394f6699ae
[INFO] sha for GitHub repo mrchoung/ft_ls: e06725717fdcc2a358db1fbef684af394f6699ae
[INFO] validating manifest of mrchoung/ft_ls on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mrchoung/ft_ls on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mrchoung/ft_ls
[INFO] finished frobbing mrchoung/ft_ls
[INFO] frobbed toml for mrchoung/ft_ls written to work/ex/beta-1.37-6/sources/1.36.0/gh/mrchoung/ft_ls/Cargo.toml
[INFO] started frobbing mrchoung/ft_ls
[INFO] finished frobbing mrchoung/ft_ls
[INFO] frobbed toml for mrchoung/ft_ls written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mrchoung/ft_ls/Cargo.toml
[INFO] crate mrchoung/ft_ls already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mrchoung/ft_ls against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mrchoung/ft_ls:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] d734a101a357dd2375eed99791bfd1f36c71773dc2c956a09705f47b0a03b2a0
[INFO] running `"docker" "start" "-a" "d734a101a357dd2375eed99791bfd1f36c71773dc2c956a09705f47b0a03b2a0"`
[INFO] [stderr]    Compiling ft_ls v0.1.0 (/opt/crater/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]   |                                                                                 ^^^^^^^
[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" "d734a101a357dd2375eed99791bfd1f36c71773dc2c956a09705f47b0a03b2a0"`
[INFO] running `"docker" "rm" "-f" "d734a101a357dd2375eed99791bfd1f36c71773dc2c956a09705f47b0a03b2a0"`
[INFO] [stdout] d734a101a357dd2375eed99791bfd1f36c71773dc2c956a09705f47b0a03b2a0