[INFO] fetching crate futures-io-preview 0.3.0-alpha.19...
[INFO] checking futures-io-preview-0.3.0-alpha.19 against 1.55.0 for beta-1.56-3
[INFO] extracting crate futures-io-preview 0.3.0-alpha.19 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate futures-io-preview 0.3.0-alpha.19 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 futures-io-preview 0.3.0-alpha.19
[INFO] finished tweaking crates.io crate futures-io-preview 0.3.0-alpha.19
[INFO] tweaked toml for crates.io crate futures-io-preview 0.3.0-alpha.19 written to /workspace/builds/worker-0/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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] cc586509cac9c44cb74c2c09d86969d5edb3a2aa7702ebbc0cc4ff516e509fda
[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" "cc586509cac9c44cb74c2c09d86969d5edb3a2aa7702ebbc0cc4ff516e509fda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc586509cac9c44cb74c2c09d86969d5edb3a2aa7702ebbc0cc4ff516e509fda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc586509cac9c44cb74c2c09d86969d5edb3a2aa7702ebbc0cc4ff516e509fda", kill_on_drop: false }`
[INFO] [stdout] cc586509cac9c44cb74c2c09d86969d5edb3a2aa7702ebbc0cc4ff516e509fda
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "check" "--frozen" "--all" "--all-targets" "--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] b0772f130fead4f8aab5fa96a40fb8378da19e9f17755b8d0d6d44c682a3a7e9
[INFO] running `Command { std: "docker" "start" "-a" "b0772f130fead4f8aab5fa96a40fb8378da19e9f17755b8d0d6d44c682a3a7e9", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.19 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `Command { std: "docker" "inspect" "b0772f130fead4f8aab5fa96a40fb8378da19e9f17755b8d0d6d44c682a3a7e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0772f130fead4f8aab5fa96a40fb8378da19e9f17755b8d0d6d44c682a3a7e9", kill_on_drop: false }`
[INFO] [stdout] b0772f130fead4f8aab5fa96a40fb8378da19e9f17755b8d0d6d44c682a3a7e9
