[INFO] fetching crate metrics-observer-prometheus 0.1.4...
[INFO] testing metrics-observer-prometheus-0.1.4 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate metrics-observer-prometheus 0.1.4 into /workspace/builds/worker-52/source
[INFO] validating manifest of crates.io crate metrics-observer-prometheus 0.1.4 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-52/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2452dc19213de084e74a73e092783618983bfa57d57bf8c5d6e76fcd4f1b203c
[INFO] running `Command { std: "docker" "start" "-a" "2452dc19213de084e74a73e092783618983bfa57d57bf8c5d6e76fcd4f1b203c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2452dc19213de084e74a73e092783618983bfa57d57bf8c5d6e76fcd4f1b203c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2452dc19213de084e74a73e092783618983bfa57d57bf8c5d6e76fcd4f1b203c", kill_on_drop: false }`
[INFO] [stdout] 2452dc19213de084e74a73e092783618983bfa57d57bf8c5d6e76fcd4f1b203c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 74f63e8b695219e5769715d3c8565f3d030fb539b6e0f05b57e383cfd870ddcf
[INFO] running `Command { std: "docker" "start" "-a" "74f63e8b695219e5769715d3c8565f3d030fb539b6e0f05b57e383cfd870ddcf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling metrics-core v0.5.2
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling hdrhistogram v6.3.4
[INFO] [stderr]    Compiling metrics-util v0.3.2
[INFO] [stderr]    Compiling metrics-observer-prometheus v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.96s
[INFO] running `Command { std: "docker" "inspect" "74f63e8b695219e5769715d3c8565f3d030fb539b6e0f05b57e383cfd870ddcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74f63e8b695219e5769715d3c8565f3d030fb539b6e0f05b57e383cfd870ddcf", kill_on_drop: false }`
[INFO] [stdout] 74f63e8b695219e5769715d3c8565f3d030fb539b6e0f05b57e383cfd870ddcf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0207c9e238cc0a9e3200a085004a97057eb038a20c2f33f4b7b183f4a4da933a
[INFO] running `Command { std: "docker" "start" "-a" "0207c9e238cc0a9e3200a085004a97057eb038a20c2f33f4b7b183f4a4da933a", kill_on_drop: false }`
[INFO] [stderr]    Compiling metrics-observer-prometheus v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `Command { std: "docker" "inspect" "0207c9e238cc0a9e3200a085004a97057eb038a20c2f33f4b7b183f4a4da933a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0207c9e238cc0a9e3200a085004a97057eb038a20c2f33f4b7b183f4a4da933a", kill_on_drop: false }`
[INFO] [stdout] 0207c9e238cc0a9e3200a085004a97057eb038a20c2f33f4b7b183f4a4da933a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9bf26b7476bf39ab4abc0a7d300e9e502e1481b41aa0125200fd2b57c9417176
[INFO] running `Command { std: "docker" "start" "-a" "9bf26b7476bf39ab4abc0a7d300e9e502e1481b41aa0125200fd2b57c9417176", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/metrics_observer_prometheus-4ac014a55bba20b1)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests metrics-observer-prometheus
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9bf26b7476bf39ab4abc0a7d300e9e502e1481b41aa0125200fd2b57c9417176", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bf26b7476bf39ab4abc0a7d300e9e502e1481b41aa0125200fd2b57c9417176", kill_on_drop: false }`
[INFO] [stdout] 9bf26b7476bf39ab4abc0a7d300e9e502e1481b41aa0125200fd2b57c9417176