[INFO] fetching crate metrics-exporter-prometheus 0.1.0-alpha.7...
[INFO] checking metrics-exporter-prometheus-0.1.0-alpha.7 against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] extracting crate metrics-exporter-prometheus 0.1.0-alpha.7 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate metrics-exporter-prometheus 0.1.0-alpha.7 on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate metrics-exporter-prometheus 0.1.0-alpha.7
[INFO] finished tweaking crates.io crate metrics-exporter-prometheus 0.1.0-alpha.7
[INFO] tweaked toml for crates.io crate metrics-exporter-prometheus 0.1.0-alpha.7 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate metrics-exporter-prometheus 0.1.0-alpha.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a01027624a7b3c759552ed576ea82ab39fae5ca3dc6e35b5915a05ffd8cc4160
[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" "a01027624a7b3c759552ed576ea82ab39fae5ca3dc6e35b5915a05ffd8cc4160", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a01027624a7b3c759552ed576ea82ab39fae5ca3dc6e35b5915a05ffd8cc4160", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a01027624a7b3c759552ed576ea82ab39fae5ca3dc6e35b5915a05ffd8cc4160", kill_on_drop: false }`
[INFO] [stdout] a01027624a7b3c759552ed576ea82ab39fae5ca3dc6e35b5915a05ffd8cc4160
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f8383b7bc12e260e1bde9d1e1f0e99d0d6c36c6b9e84d16bb4753396692f9d5f
[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" "f8383b7bc12e260e1bde9d1e1f0e99d0d6c36c6b9e84d16bb4753396692f9d5f", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-sink v0.3.7
[INFO] [stderr]     Checking futures-task v0.3.7
[INFO] [stderr]    Compiling metrics v0.13.0-alpha.8
[INFO] [stderr]     Checking atomic-shim v0.1.0
[INFO] [stderr]     Checking futures-channel v0.3.7
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]     Checking sharded-slab v0.1.0
[INFO] [stderr]     Checking socket2 v0.3.15
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]    Compiling aho-corasick v0.7.14
[INFO] [stderr]    Compiling raw-cpuid v8.1.2
[INFO] [stderr]     Checking crossbeam-utils v0.8.0
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.21
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking futures-util v0.3.7
[INFO] [stderr]     Checking hdrhistogram v7.1.0
[INFO] [stderr]     Checking dashmap v3.11.10
[INFO] [stderr]     Checking crossbeam-epoch v0.9.0
[INFO] [stderr]     Checking tracing v0.1.21
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking tracing-subscriber v0.2.15
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking quanta v0.6.5
[INFO] [stderr]     Checking thiserror v1.0.21
[INFO] [stderr]    Compiling metrics-macros v0.1.0-alpha.5
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]     Checking metrics-util v0.4.0-alpha.6
[INFO] [stderr]     Checking hyper v0.13.9
[INFO] [stderr]     Checking metrics-exporter-prometheus v0.1.0-alpha.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.54s
[INFO] running `Command { std: "docker" "inspect" "f8383b7bc12e260e1bde9d1e1f0e99d0d6c36c6b9e84d16bb4753396692f9d5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8383b7bc12e260e1bde9d1e1f0e99d0d6c36c6b9e84d16bb4753396692f9d5f", kill_on_drop: false }`
[INFO] [stdout] f8383b7bc12e260e1bde9d1e1f0e99d0d6c36c6b9e84d16bb4753396692f9d5f