[INFO] fetching crate base32768 0.1.0...
[INFO] testing base32768-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate base32768 0.1.0 into /workspace/builds/worker-84/source
[INFO] validating manifest of crates.io crate base32768 0.1.0 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 crates.io crate base32768 0.1.0
[INFO] finished tweaking crates.io crate base32768 0.1.0
[INFO] tweaked toml for crates.io crate base32768 0.1.0 written to /workspace/builds/worker-84/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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] bbfb1d43ff2f21fe46427e34e68635835578a5652e7ff3fefb3c066969b1e39f
[INFO] running `Command { std: "docker" "start" "-a" "bbfb1d43ff2f21fe46427e34e68635835578a5652e7ff3fefb3c066969b1e39f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bbfb1d43ff2f21fe46427e34e68635835578a5652e7ff3fefb3c066969b1e39f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbfb1d43ff2f21fe46427e34e68635835578a5652e7ff3fefb3c066969b1e39f", kill_on_drop: false }`
[INFO] [stdout] bbfb1d43ff2f21fe46427e34e68635835578a5652e7ff3fefb3c066969b1e39f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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] 307c66fe569e04fa3b9e37df8718ee2be8dc8a4f8f416b885b5d06757e0093cb
[INFO] running `Command { std: "docker" "start" "-a" "307c66fe569e04fa3b9e37df8718ee2be8dc8a4f8f416b885b5d06757e0093cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling base32768 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(io)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/lib.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | / lazy_static! {
[INFO] [stdout] 22 | |     static ref LOOKUP_TABLES: LookupTables = {
[INFO] [stdout] 23 | |         let mut encode = HashMap::new();
[INFO] [stdout] 24 | |         let mut decode = HashMap::new();
[INFO] [stdout] ...  |
[INFO] [stdout] 65 | |     };
[INFO] [stdout] 66 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/lib.rs:109:79
[INFO] [stdout]     |
[INFO] [stdout] 109 |         return Err(errors::Base32768Error::new(format!("Error encoding {}", e.description())));
[INFO] [stdout]     |                                                                               ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `base32768` due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "307c66fe569e04fa3b9e37df8718ee2be8dc8a4f8f416b885b5d06757e0093cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "307c66fe569e04fa3b9e37df8718ee2be8dc8a4f8f416b885b5d06757e0093cb", kill_on_drop: false }`
[INFO] [stdout] 307c66fe569e04fa3b9e37df8718ee2be8dc8a4f8f416b885b5d06757e0093cb