[INFO] fetching crate unicom-serial 0.1.1...
[INFO] testing unicom-serial-0.1.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate unicom-serial 0.1.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate unicom-serial 0.1.1 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 unicom-serial 0.1.1
[INFO] finished tweaking crates.io crate unicom-serial 0.1.1
[INFO] tweaked toml for crates.io crate unicom-serial 0.1.1 written to /workspace/builds/worker-1/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] [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" "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] 485c31751bfa436aa22adf979bd268412e6e2e3d6e8275e3d359c35e244d1898
[INFO] running `Command { std: "docker" "start" "-a" "485c31751bfa436aa22adf979bd268412e6e2e3d6e8275e3d359c35e244d1898", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "485c31751bfa436aa22adf979bd268412e6e2e3d6e8275e3d359c35e244d1898", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "485c31751bfa436aa22adf979bd268412e6e2e3d6e8275e3d359c35e244d1898", kill_on_drop: false }`
[INFO] [stdout] 485c31751bfa436aa22adf979bd268412e6e2e3d6e8275e3d359c35e244d1898
[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=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] d7b05ca2110b1b99fe59c530dca571f0fdfd60d5e97d9d2145a2bff2ce680c74
[INFO] running `Command { std: "docker" "start" "-a" "d7b05ca2110b1b99fe59c530dca571f0fdfd60d5e97d9d2145a2bff2ce680c74", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicom v0.1.1
[INFO] [stdout] error: Either of features should be selected: futures, tokio, async-std
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/unicom-0.1.1/src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | compile_error!("Either of features should be selected: futures, tokio, async-std");
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `unicom` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "d7b05ca2110b1b99fe59c530dca571f0fdfd60d5e97d9d2145a2bff2ce680c74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7b05ca2110b1b99fe59c530dca571f0fdfd60d5e97d9d2145a2bff2ce680c74", kill_on_drop: false }`
[INFO] [stdout] d7b05ca2110b1b99fe59c530dca571f0fdfd60d5e97d9d2145a2bff2ce680c74