[INFO] cloning repository https://github.com/kdar/rust-socket-activation
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kdar/rust-socket-activation" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkdar%2Frust-socket-activation", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkdar%2Frust-socket-activation'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf5103a3f2b2feb7dc86b29b576de13e1439b68a
[INFO] testing kdar/rust-socket-activation against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkdar%2Frust-socket-activation" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kdar/rust-socket-activation 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/kdar/rust-socket-activation
[INFO] finished tweaking git repo https://github.com/kdar/rust-socket-activation
[INFO] tweaked toml for git repo https://github.com/kdar/rust-socket-activation written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/kdar/rust-socket-activation 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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 383c80c4c67eea2b0ca71f05f524576938f368c8cf1c3ea7b1f8f6d9c03db506
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "383c80c4c67eea2b0ca71f05f524576938f368c8cf1c3ea7b1f8f6d9c03db506", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "383c80c4c67eea2b0ca71f05f524576938f368c8cf1c3ea7b1f8f6d9c03db506", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "383c80c4c67eea2b0ca71f05f524576938f368c8cf1c3ea7b1f8f6d9c03db506", kill_on_drop: false }`
[INFO] [stdout] 383c80c4c67eea2b0ca71f05f524576938f368c8cf1c3ea7b1f8f6d9c03db506
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 909e5381d1549d8f2e6eaf7b0b2bbd82c39e18a12cbd0fc0bbba9ccd16b71ae2
[INFO] running `Command { std: "docker" "start" "-a" "909e5381d1549d8f2e6eaf7b0b2bbd82c39e18a12cbd0fc0bbba9ccd16b71ae2", kill_on_drop: false }`
[INFO] [stderr]    Compiling stable_deref_trait v1.0.0
[INFO] [stderr]    Compiling utf8-cstr v0.1.6
[INFO] [stderr]    Compiling libsystemd-sys v0.1.0
[INFO] [stderr]    Compiling rustc_version v0.2.1
[INFO] [stderr]    Compiling aho-corasick v0.6.3
[INFO] [stderr]    Compiling tokio-io v0.1.3
[INFO] [stderr]    Compiling mbox v0.4.1
[INFO] [stderr]    Compiling regex v0.2.2
[INFO] [stderr]    Compiling tokio-core v0.1.9
[INFO] [stdout] error: unexpected token: `<-`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mbox-0.4.1/src/mbox.rs:192:16
[INFO] [stdout]     |
[INFO] [stdout] 192 |         MALLOC <- value.clone()
[INFO] [stdout]     |                ^^
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to write a comparison against a negative value, add a space in between `<` and `-`
[INFO] [stdout]     |
[INFO] [stdout] 192 |         MALLOC < - value.clone()
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mbox` 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" "909e5381d1549d8f2e6eaf7b0b2bbd82c39e18a12cbd0fc0bbba9ccd16b71ae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "909e5381d1549d8f2e6eaf7b0b2bbd82c39e18a12cbd0fc0bbba9ccd16b71ae2", kill_on_drop: false }`
[INFO] [stdout] 909e5381d1549d8f2e6eaf7b0b2bbd82c39e18a12cbd0fc0bbba9ccd16b71ae2