[INFO] fetching crate tokio-tower 0.4.0...
[INFO] checking tokio-tower-0.4.0 against master#119d2a1a98fe87d4ae6cabf12134a0ef2fb95851 for pr-75180
[INFO] extracting crate tokio-tower 0.4.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate tokio-tower 0.4.0 on toolchain 119d2a1a98fe87d4ae6cabf12134a0ef2fb95851
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tokio-tower 0.4.0
[INFO] finished tweaking crates.io crate tokio-tower 0.4.0
[INFO] tweaked toml for crates.io crate tokio-tower 0.4.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cf4fb956526907af4840a5ea5c62aa3e0bb377b8c6ae7779a5710914ac665dae
[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" "cf4fb956526907af4840a5ea5c62aa3e0bb377b8c6ae7779a5710914ac665dae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf4fb956526907af4840a5ea5c62aa3e0bb377b8c6ae7779a5710914ac665dae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf4fb956526907af4840a5ea5c62aa3e0bb377b8c6ae7779a5710914ac665dae", kill_on_drop: false }`
[INFO] [stdout] cf4fb956526907af4840a5ea5c62aa3e0bb377b8c6ae7779a5710914ac665dae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=forbid" "-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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 18bff80f0ee700acd618a78b51eecc2a1aceae69a1f2597a7c1f1642b8d557e5
[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" "18bff80f0ee700acd618a78b51eecc2a1aceae69a1f2597a7c1f1642b8d557e5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking tracing-core v0.1.15
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking crossbeam-channel v0.4.3
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking tracing v0.1.19
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking tower-discover v0.3.0
[INFO] [stderr]     Checking tower-load v0.3.0
[INFO] [stderr]     Checking tokio-test v0.2.1
[INFO] [stderr]     Checking async-bincode v0.5.1
[INFO] [stderr]     Checking tower-test v0.3.0
[INFO] [stderr]     Checking tokio-tower v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 45.28s
[INFO] running `Command { std: "docker" "inspect" "18bff80f0ee700acd618a78b51eecc2a1aceae69a1f2597a7c1f1642b8d557e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18bff80f0ee700acd618a78b51eecc2a1aceae69a1f2597a7c1f1642b8d557e5", kill_on_drop: false }`
[INFO] [stdout] 18bff80f0ee700acd618a78b51eecc2a1aceae69a1f2597a7c1f1642b8d557e5