[INFO] fetching crate eth_checksum 0.1.2...
[INFO] testing eth_checksum-0.1.2 against 1.60.0 for beta-1.61-1
[INFO] extracting crate eth_checksum 0.1.2 into /workspace/builds/worker-109/source
[INFO] validating manifest of crates.io crate eth_checksum 0.1.2 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate eth_checksum 0.1.2
[INFO] finished tweaking crates.io crate eth_checksum 0.1.2
[INFO] tweaked toml for crates.io crate eth_checksum 0.1.2 written to /workspace/builds/worker-109/source/Cargo.toml
[INFO] crate crates.io crate eth_checksum 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fa952e923fc52b70c600b556544bf8f5d73056e67c7c489659eee7eb8cbf50c0
[INFO] running `Command { std: "docker" "start" "-a" "fa952e923fc52b70c600b556544bf8f5d73056e67c7c489659eee7eb8cbf50c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa952e923fc52b70c600b556544bf8f5d73056e67c7c489659eee7eb8cbf50c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa952e923fc52b70c600b556544bf8f5d73056e67c7c489659eee7eb8cbf50c0", kill_on_drop: false }`
[INFO] [stdout] fa952e923fc52b70c600b556544bf8f5d73056e67c7c489659eee7eb8cbf50c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 83d40121bec3bb73ba466fdf6402bc3ad711942b50d2ff4b800159aca88a8da0
[INFO] running `Command { std: "docker" "start" "-a" "83d40121bec3bb73ba466fdf6402bc3ad711942b50d2ff4b800159aca88a8da0", 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 9.73s
[INFO] running `Command { std: "docker" "inspect" "83d40121bec3bb73ba466fdf6402bc3ad711942b50d2ff4b800159aca88a8da0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83d40121bec3bb73ba466fdf6402bc3ad711942b50d2ff4b800159aca88a8da0", kill_on_drop: false }`
[INFO] [stdout] 83d40121bec3bb73ba466fdf6402bc3ad711942b50d2ff4b800159aca88a8da0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9f9f47898a071f001ca1dded972e40ecef35153f43cee38b02738b66d46e9535
[INFO] running `Command { std: "docker" "start" "-a" "9f9f47898a071f001ca1dded972e40ecef35153f43cee38b02738b66d46e9535", 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:1:39
[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" "9f9f47898a071f001ca1dded972e40ecef35153f43cee38b02738b66d46e9535", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f9f47898a071f001ca1dded972e40ecef35153f43cee38b02738b66d46e9535", kill_on_drop: false }`
[INFO] [stdout] 9f9f47898a071f001ca1dded972e40ecef35153f43cee38b02738b66d46e9535