[INFO] cloning repository https://github.com/usey11/basic_shell
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/usey11/basic_shell" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fusey11%2Fbasic_shell", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fusey11%2Fbasic_shell'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b925f1e61b9ce78c1a394e8a9362ec04c1c7d77f
[INFO] checking usey11/basic_shell against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fusey11%2Fbasic_shell" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/usey11/basic_shell on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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 /workspace/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 `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8259c3b57395416617cbecf36bfdbd1ed5a798b13d6bf09ce7274106f56c4831
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8259c3b57395416617cbecf36bfdbd1ed5a798b13d6bf09ce7274106f56c4831", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8259c3b57395416617cbecf36bfdbd1ed5a798b13d6bf09ce7274106f56c4831", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8259c3b57395416617cbecf36bfdbd1ed5a798b13d6bf09ce7274106f56c4831", kill_on_drop: false }`
[INFO] [stdout] 8259c3b57395416617cbecf36bfdbd1ed5a798b13d6bf09ce7274106f56c4831
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 220f97952017d54400788b91046b0cb87e4ed4a710e5a137761a58bec701c92e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "220f97952017d54400788b91046b0cb87e4ed4a710e5a137761a58bec701c92e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]     Checking nix v0.15.0
[INFO] [stderr]     Checking basic_shell v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/main.rs:76:25
[INFO] [stdout]    |
[INFO] [stdout] 76 |                         ;
[INFO] [stdout]    |                         ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/main.rs:76:25
[INFO] [stdout]    |
[INFO] [stdout] 76 |                         ;
[INFO] [stdout]    |                         ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `flush` found for struct `Stdout` in the current scope
[INFO] [stdout]     --> src/main.rs:23:22
[INFO] [stdout]      |
[INFO] [stdout] 23   |         io::stdout().flush().unwrap();
[INFO] [stdout]      |                      ^^^^^ method not found in `Stdout`
[INFO] [stdout]      |
[INFO] [stdout]      = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]      |
[INFO] [stdout] 3    | use std::io::Write;
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `flush` found for struct `Stdout` in the current scope
[INFO] [stdout]     --> src/main.rs:57:18
[INFO] [stdout]      |
[INFO] [stdout] 57   |     io::stdout().flush().unwrap();
[INFO] [stdout]      |                  ^^^^^ method not found in `Stdout`
[INFO] [stdout]      |
[INFO] [stdout]      = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]      |
[INFO] [stdout] 3    | use std::io::Write;
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `basic_shell`
[INFO] [stdout] error[E0599]: no method named `flush` found for struct `Stdout` in the current scope
[INFO] [stdout]     --> src/main.rs:23:22
[INFO] [stdout]      |
[INFO] [stdout] 23   |         io::stdout().flush().unwrap();
[INFO] [stdout]      |                      ^^^^^ method not found in `Stdout`
[INFO] [stdout]      |
[INFO] [stdout]      = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]      |
[INFO] [stdout] 3    | use std::io::Write;
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error[E0599]: no method named `flush` found for struct `Stdout` in the current scope
[INFO] [stdout]     --> src/main.rs:57:18
[INFO] [stdout]      |
[INFO] [stdout] 57   |     io::stdout().flush().unwrap();
[INFO] [stdout]      |                  ^^^^^ method not found in `Stdout`
[INFO] [stdout]      |
[INFO] [stdout]      = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]      |
[INFO] [stdout] 3    | use std::io::Write;
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "220f97952017d54400788b91046b0cb87e4ed4a710e5a137761a58bec701c92e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "220f97952017d54400788b91046b0cb87e4ed4a710e5a137761a58bec701c92e", kill_on_drop: false }`
[INFO] [stdout] 220f97952017d54400788b91046b0cb87e4ed4a710e5a137761a58bec701c92e