[INFO] updating cached repository https://github.com/usey11/basic_shell
[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] b925f1e61b9ce78c1a394e8a9362ec04c1c7d77f
[INFO] testing usey11/basic_shell against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fusey11%2Fbasic_shell" "work/builds/worker-1/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/usey11/basic_shell 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/usey11/basic_shell
[INFO] finished tweaking git repo https://github.com/usey11/basic_shell
[INFO] tweaked toml for git repo https://github.com/usey11/basic_shell written to work/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/usey11/basic_shell 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-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/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] 953d0ae3c6a8542d5dc6a4c4f1edd7295f06d7243c0d1ad149d9a323eba7b2b2
[INFO] running `"docker" "start" "-a" "953d0ae3c6a8542d5dc6a4c4f1edd7295f06d7243c0d1ad149d9a323eba7b2b2"`
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling basic_shell v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/main.rs:76:25
[INFO] [stderr]    |
[INFO] [stderr] 76 |                         ;
[INFO] [stderr]    |                         ^ help: remove this semicolon
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(redundant_semicolon)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `flush` found for type `std::io::Stdout` in the current scope
[INFO] [stderr]   --> src/main.rs:23:22
[INFO] [stderr]    |
[INFO] [stderr] 23 |         io::stdout().flush().unwrap();
[INFO] [stderr]    |                      ^^^^^ method not found in `std::io::Stdout`
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the trait is in scope
[INFO] [stderr] help: the following trait is implemented but not in scope, perhaps add a `use` for it:
[INFO] [stderr]    |
[INFO] [stderr] 3  | use std::io::Write;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `flush` found for type `std::io::Stdout` in the current scope
[INFO] [stderr]   --> src/main.rs:57:18
[INFO] [stderr]    |
[INFO] [stderr] 57 |     io::stdout().flush().unwrap();
[INFO] [stderr]    |                  ^^^^^ method not found in `std::io::Stdout`
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the trait is in scope
[INFO] [stderr] help: the following trait is implemented but not in scope, perhaps add a `use` for it:
[INFO] [stderr]    |
[INFO] [stderr] 3  | use std::io::Write;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `basic_shell`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "953d0ae3c6a8542d5dc6a4c4f1edd7295f06d7243c0d1ad149d9a323eba7b2b2"`
[INFO] running `"docker" "rm" "-f" "953d0ae3c6a8542d5dc6a4c4f1edd7295f06d7243c0d1ad149d9a323eba7b2b2"`
[INFO] [stdout] 953d0ae3c6a8542d5dc6a4c4f1edd7295f06d7243c0d1ad149d9a323eba7b2b2