[INFO] cloning repository https://github.com/miguelmota/eth_checksum
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/miguelmota/eth_checksum" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmiguelmota%2Feth_checksum", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmiguelmota%2Feth_checksum'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fea7208bc7b7b8359082dcff6039032d355b82b3
[INFO] testing miguelmota/eth_checksum against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmiguelmota%2Feth_checksum" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/miguelmota/eth_checksum 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/miguelmota/eth_checksum
[INFO] finished tweaking git repo https://github.com/miguelmota/eth_checksum
[INFO] tweaked toml for git repo https://github.com/miguelmota/eth_checksum written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/miguelmota/eth_checksum 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] d770644a4d40ad86d72be29a05a94a384386cc5ffe4b93f3f1fb3439a16fd3ef
[INFO] running `Command { std: "docker" "start" "-a" "d770644a4d40ad86d72be29a05a94a384386cc5ffe4b93f3f1fb3439a16fd3ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d770644a4d40ad86d72be29a05a94a384386cc5ffe4b93f3f1fb3439a16fd3ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d770644a4d40ad86d72be29a05a94a384386cc5ffe4b93f3f1fb3439a16fd3ef", kill_on_drop: false }`
[INFO] [stdout] d770644a4d40ad86d72be29a05a94a384386cc5ffe4b93f3f1fb3439a16fd3ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 0d81b7d3cc9086e52594b87ba5fb3ad0be2392f6d5ad0cc1fe2d9e0d54d65efe
[INFO] running `Command { std: "docker" "start" "-a" "0d81b7d3cc9086e52594b87ba5fb3ad0be2392f6d5ad0cc1fe2d9e0d54d65efe", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling eth_checksum v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.33s
[INFO] running `Command { std: "docker" "inspect" "0d81b7d3cc9086e52594b87ba5fb3ad0be2392f6d5ad0cc1fe2d9e0d54d65efe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d81b7d3cc9086e52594b87ba5fb3ad0be2392f6d5ad0cc1fe2d9e0d54d65efe", kill_on_drop: false }`
[INFO] [stdout] 0d81b7d3cc9086e52594b87ba5fb3ad0be2392f6d5ad0cc1fe2d9e0d54d65efe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99a4eb72f0f409fdd9fb7ff5ac4342067fa6064222c97a05e6db61e30418e38f
[INFO] running `Command { std: "docker" "start" "-a" "99a4eb72f0f409fdd9fb7ff5ac4342067fa6064222c97a05e6db61e30418e38f", kill_on_drop: false }`
[INFO] [stderr]    Compiling eth_checksum v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:31
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(any(test, bench), feature(test))]
[INFO] [stdout]   |                               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `eth_checksum` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "99a4eb72f0f409fdd9fb7ff5ac4342067fa6064222c97a05e6db61e30418e38f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99a4eb72f0f409fdd9fb7ff5ac4342067fa6064222c97a05e6db61e30418e38f", kill_on_drop: false }`
[INFO] [stdout] 99a4eb72f0f409fdd9fb7ff5ac4342067fa6064222c97a05e6db61e30418e38f