[INFO] fetching crate metrics-observer-prometheus 0.1.4...
[INFO] checking metrics-observer-prometheus-0.1.4 against master#da897dfb6daa268a965d2d73620316ba56020a19 for pr-76219
[INFO] extracting crate metrics-observer-prometheus 0.1.4 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate metrics-observer-prometheus 0.1.4 on toolchain da897dfb6daa268a965d2d73620316ba56020a19
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+da897dfb6daa268a965d2d73620316ba56020a19" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate metrics-observer-prometheus 0.1.4
[INFO] finished tweaking crates.io crate metrics-observer-prometheus 0.1.4
[INFO] tweaked toml for crates.io crate metrics-observer-prometheus 0.1.4 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+da897dfb6daa268a965d2d73620316ba56020a19" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+da897dfb6daa268a965d2d73620316ba56020a19" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+da897dfb6daa268a965d2d73620316ba56020a19" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9071523a8830b99ab87f7a6b130ea571b7bcbcf520449ac14fb0aee141b87297
[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" "9071523a8830b99ab87f7a6b130ea571b7bcbcf520449ac14fb0aee141b87297", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9071523a8830b99ab87f7a6b130ea571b7bcbcf520449ac14fb0aee141b87297", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9071523a8830b99ab87f7a6b130ea571b7bcbcf520449ac14fb0aee141b87297", kill_on_drop: false }`
[INFO] [stdout] 9071523a8830b99ab87f7a6b130ea571b7bcbcf520449ac14fb0aee141b87297
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+da897dfb6daa268a965d2d73620316ba56020a19" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d903e0ecd33be1449ead9e69dfc0250a779ded5f51f58e88a26b0d486b3b9606
[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" "d903e0ecd33be1449ead9e69dfc0250a779ded5f51f58e88a26b0d486b3b9606", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]     Checking metrics-core v0.5.2
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking hdrhistogram v6.3.4
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking metrics-util v0.3.1
[INFO] [stderr]     Checking metrics-observer-prometheus v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.16s
[INFO] running `Command { std: "docker" "inspect" "d903e0ecd33be1449ead9e69dfc0250a779ded5f51f58e88a26b0d486b3b9606", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d903e0ecd33be1449ead9e69dfc0250a779ded5f51f58e88a26b0d486b3b9606", kill_on_drop: false }`
[INFO] [stdout] d903e0ecd33be1449ead9e69dfc0250a779ded5f51f58e88a26b0d486b3b9606