[INFO] cloning repository https://github.com/Lacaranian/carbine-shell
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Lacaranian/carbine-shell" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLacaranian%2Fcarbine-shell", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLacaranian%2Fcarbine-shell'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0f469e6cb5785d71b9cbe0e9320b007aa9642cbf
[INFO] testing Lacaranian/carbine-shell against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLacaranian%2Fcarbine-shell" "/workspace/builds/worker-54/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-54/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Lacaranian/carbine-shell on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Lacaranian/carbine-shell
[INFO] finished tweaking git repo https://github.com/Lacaranian/carbine-shell
[INFO] tweaked toml for git repo https://github.com/Lacaranian/carbine-shell written to /workspace/builds/worker-54/source/Cargo.toml
[INFO] crate git repo https://github.com/Lacaranian/carbine-shell already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb3f724f93bbf578825a8aa81f0b99e8f24b272458fc23f599c821f231c63a35
[INFO] running `Command { std: "docker" "start" "-a" "fb3f724f93bbf578825a8aa81f0b99e8f24b272458fc23f599c821f231c63a35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb3f724f93bbf578825a8aa81f0b99e8f24b272458fc23f599c821f231c63a35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb3f724f93bbf578825a8aa81f0b99e8f24b272458fc23f599c821f231c63a35", kill_on_drop: false }`
[INFO] [stdout] fb3f724f93bbf578825a8aa81f0b99e8f24b272458fc23f599c821f231c63a35
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aaa46252190e41bbbeb12bff48bd8bdc50d3b73eccca4b0f08371fc6fbb554c7
[INFO] running `Command { std: "docker" "start" "-a" "aaa46252190e41bbbeb12bff48bd8bdc50d3b73eccca4b0f08371fc6fbb554c7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling libc v0.2.13
[INFO] [stderr]    Compiling carbine-shell v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(io)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::str;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::env::home_dir`: This function's behavior is unexpected and probably not what you want. Consider using a crate from crates.io instead.
[INFO] [stdout]   --> src/main.rs:22:35
[INFO] [stdout]    |
[INFO] [stdout] 22 |         let init_dir = match env::home_dir() {
[INFO] [stdout]    |                                   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::env::home_dir`: This function's behavior is unexpected and probably not what you want. Consider using a crate from crates.io instead.
[INFO] [stdout]   --> src/builtins/cd.rs:24:14
[INFO] [stdout]    |
[INFO] [stdout] 24 |         env::home_dir()
[INFO] [stdout]    |              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `chars` found for struct `std::io::BufReader` in the current scope
[INFO] [stdout]   --> src/main.rs:75:28
[INFO] [stdout]    |
[INFO] [stdout] 75 |     for opt_char in reader.chars() {
[INFO] [stdout]    |                            ^^^^^ method not found in `std::io::BufReader<&mut Stdin>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `carbine-shell` due to 3 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "aaa46252190e41bbbeb12bff48bd8bdc50d3b73eccca4b0f08371fc6fbb554c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aaa46252190e41bbbeb12bff48bd8bdc50d3b73eccca4b0f08371fc6fbb554c7", kill_on_drop: false }`
[INFO] [stdout] aaa46252190e41bbbeb12bff48bd8bdc50d3b73eccca4b0f08371fc6fbb554c7