[INFO] fetching crate witchcraft-metrics 0.1.1...
[INFO] checking witchcraft-metrics-0.1.1 against try#b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f for pr-76104
[INFO] extracting crate witchcraft-metrics 0.1.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate witchcraft-metrics 0.1.1 on toolchain b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate witchcraft-metrics 0.1.1
[INFO] finished tweaking crates.io crate witchcraft-metrics 0.1.1
[INFO] tweaked toml for crates.io crate witchcraft-metrics 0.1.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded exponential-decay-histogram v0.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 50222cdf4e2ab2c590a65943b1b67fec1c732294feb6bf386517e64aa4d4aed2
[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" "50222cdf4e2ab2c590a65943b1b67fec1c732294feb6bf386517e64aa4d4aed2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50222cdf4e2ab2c590a65943b1b67fec1c732294feb6bf386517e64aa4d4aed2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50222cdf4e2ab2c590a65943b1b67fec1c732294feb6bf386517e64aa4d4aed2", kill_on_drop: false }`
[INFO] [stdout] 50222cdf4e2ab2c590a65943b1b67fec1c732294feb6bf386517e64aa4d4aed2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 668647d981fb78554aef895c348122b5eb1b912f8af2c46254df35e7cade5d37
[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" "668647d981fb78554aef895c348122b5eb1b912f8af2c46254df35e7cade5d37", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]     Checking assert_approx_eq v1.1.0
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking ordered-float v1.1.0
[INFO] [stderr]     Checking exponential-decay-histogram v0.1.5
[INFO] [stderr]     Checking serde-value v0.6.0
[INFO] [stderr]     Checking witchcraft-metrics v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.01s
[INFO] running `Command { std: "docker" "inspect" "668647d981fb78554aef895c348122b5eb1b912f8af2c46254df35e7cade5d37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "668647d981fb78554aef895c348122b5eb1b912f8af2c46254df35e7cade5d37", kill_on_drop: false }`
[INFO] [stdout] 668647d981fb78554aef895c348122b5eb1b912f8af2c46254df35e7cade5d37