[INFO] fetching crate metrics-exporter-prometheus 0.1.0-alpha.6...
[INFO] checking metrics-exporter-prometheus-0.1.0-alpha.6 against master#0dce3f606e05cffab7361c132a399d3550ab0df8 for pr-78376
[INFO] extracting crate metrics-exporter-prometheus 0.1.0-alpha.6 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate metrics-exporter-prometheus 0.1.0-alpha.6 on toolchain 0dce3f606e05cffab7361c132a399d3550ab0df8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate metrics-exporter-prometheus 0.1.0-alpha.6
[INFO] finished tweaking crates.io crate metrics-exporter-prometheus 0.1.0-alpha.6
[INFO] tweaked toml for crates.io crate metrics-exporter-prometheus 0.1.0-alpha.6 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate metrics-exporter-prometheus 0.1.0-alpha.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 705a54ef78f3e9439877727fffb9c53c60a48e70f9f3420b8b9540d4f77103bc
[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" "705a54ef78f3e9439877727fffb9c53c60a48e70f9f3420b8b9540d4f77103bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "705a54ef78f3e9439877727fffb9c53c60a48e70f9f3420b8b9540d4f77103bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "705a54ef78f3e9439877727fffb9c53c60a48e70f9f3420b8b9540d4f77103bc", kill_on_drop: false }`
[INFO] [stdout] 705a54ef78f3e9439877727fffb9c53c60a48e70f9f3420b8b9540d4f77103bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c31922ff346b56d0925cfb8b99e65cd968960270c7bebf5bdb49fd8765763653
[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" "c31922ff346b56d0925cfb8b99e65cd968960270c7bebf5bdb49fd8765763653", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling syn v1.0.46
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]    Compiling lexical-core v0.7.4
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling crossbeam-utils v0.8.0
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]     Checking instant v0.1.7
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking crc32fast v1.2.1
[INFO] [stderr]     Checking aho-corasick v0.7.14
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking crossbeam-utils v0.7.2
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]    Compiling raw-cpuid v8.1.2
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking regex v1.4.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.35
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking flate2 v1.0.18
[INFO] [stderr]     Checking socket2 v0.3.15
[INFO] [stderr]     Checking parking_lot_core v0.8.0
[INFO] [stderr]    Compiling getrandom v0.2.0
[INFO] [stderr]     Checking parking_lot v0.11.0
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]    Compiling const-random-macro v0.1.11
[INFO] [stderr]     Checking const-random v0.1.11
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking quanta v0.6.5
[INFO] [stderr]     Checking ahash v0.3.8
[INFO] [stderr]     Checking dashmap v3.11.10
[INFO] [stderr]     Checking hdrhistogram v7.1.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling pin-project-internal v1.0.1
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling metrics-macros v0.1.0-alpha.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.21
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking thiserror v1.0.21
[INFO] [stderr]     Checking metrics v0.13.0-alpha.8
[INFO] [stderr]     Checking metrics-util v0.4.0-alpha.6
[INFO] [stderr]     Checking pin-project v1.0.1
[INFO] [stderr]     Checking tracing v0.1.21
[INFO] [stderr]     Checking futures-util v0.3.7
[INFO] [stderr]     Checking pin-project v0.4.27
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]     Checking serde v1.0.117
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]     Checking hyper v0.13.8
[INFO] [stderr]     Checking tracing-subscriber v0.2.14
[INFO] [stderr]     Checking metrics-exporter-prometheus v0.1.0-alpha.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 44s
[INFO] running `Command { std: "docker" "inspect" "c31922ff346b56d0925cfb8b99e65cd968960270c7bebf5bdb49fd8765763653", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c31922ff346b56d0925cfb8b99e65cd968960270c7bebf5bdb49fd8765763653", kill_on_drop: false }`
[INFO] [stdout] c31922ff346b56d0925cfb8b99e65cd968960270c7bebf5bdb49fd8765763653