[INFO] fetching crate tokio-serde 0.8.0...
[INFO] checking tokio-serde-0.8.0 against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] extracting crate tokio-serde 0.8.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate tokio-serde 0.8.0 on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tokio-serde 0.8.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate tokio-serde 0.8.0
[INFO] tweaked toml for crates.io crate tokio-serde 0.8.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate tokio-serde 0.8.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded parking_lot_core v0.8.2
[INFO] [stderr]   Downloaded smallvec v1.5.1
[INFO] [stderr]   Downloaded serde_json v1.0.60
[INFO] [stderr]   Downloaded bincode v1.3.1
[INFO] [stderr]   Downloaded educe v0.4.13
[INFO] [stderr]   Downloaded impls v1.0.3
[INFO] [stderr]   Downloaded static_assertions v1.1.0
[INFO] [stderr]   Downloaded tokio v1.0.0
[INFO] [stderr]   Downloaded num-bigint v0.3.1
[INFO] [stderr]   Downloaded enum-ordinalize v3.1.8
[INFO] [stderr]   Downloaded rmp v0.8.9
[INFO] [stderr]   Downloaded rmp-serde v0.15.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51770ee65b20450a5b33c774ab67a64d96c48de06dd0de2ca9926596ed8c1df9
[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" "51770ee65b20450a5b33c774ab67a64d96c48de06dd0de2ca9926596ed8c1df9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51770ee65b20450a5b33c774ab67a64d96c48de06dd0de2ca9926596ed8c1df9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51770ee65b20450a5b33c774ab67a64d96c48de06dd0de2ca9926596ed8c1df9", kill_on_drop: false }`
[INFO] [stdout] 51770ee65b20450a5b33c774ab67a64d96c48de06dd0de2ca9926596ed8c1df9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bff537973449c61c964b9e2dcad09c96e6fdbccbe4755a5e17eaa30b5102a2f4
[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" "bff537973449c61c964b9e2dcad09c96e6fdbccbe4755a5e17eaa30b5102a2f4", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.55
[INFO] [stderr]     Checking futures-io v0.3.8
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling tokio v1.0.0
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking futures-channel v0.3.8
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking parking_lot_core v0.8.2
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling pin-project-internal v1.0.2
[INFO] [stderr]    Compiling futures-macro v0.3.8
[INFO] [stderr]    Compiling async-stream-impl v0.3.0
[INFO] [stderr]    Compiling tokio-macros v1.0.0
[INFO] [stderr]     Checking async-stream v0.3.0
[INFO] [stderr]     Checking pin-project v1.0.2
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking tokio-serde v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tokio-stream v0.1.0
[INFO] [stderr]     Checking tokio-util v0.6.0
[INFO] [stderr]     Checking futures-executor v0.3.8
[INFO] [stderr]     Checking futures v0.3.8
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 39.10s
[INFO] running `Command { std: "docker" "inspect" "bff537973449c61c964b9e2dcad09c96e6fdbccbe4755a5e17eaa30b5102a2f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bff537973449c61c964b9e2dcad09c96e6fdbccbe4755a5e17eaa30b5102a2f4", kill_on_drop: false }`
[INFO] [stdout] bff537973449c61c964b9e2dcad09c96e6fdbccbe4755a5e17eaa30b5102a2f4