[INFO] fetching crate metrics-rs 0.0.0...
[INFO] testing metrics-rs-0.0.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate metrics-rs 0.0.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate metrics-rs 0.0.0 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-rs 0.0.0
[INFO] finished tweaking crates.io crate metrics-rs 0.0.0
[INFO] tweaked toml for crates.io crate metrics-rs 0.0.0 written to /workspace/builds/worker-4/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] [stderr]     Blocking waiting for file lock on package cache
[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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] eca217971e9f730b65cd932e2f0017a2e940ba37baf559576ed41c51534994e7
[INFO] running `Command { std: "docker" "start" "-a" "eca217971e9f730b65cd932e2f0017a2e940ba37baf559576ed41c51534994e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eca217971e9f730b65cd932e2f0017a2e940ba37baf559576ed41c51534994e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eca217971e9f730b65cd932e2f0017a2e940ba37baf559576ed41c51534994e7", kill_on_drop: false }`
[INFO] [stdout] eca217971e9f730b65cd932e2f0017a2e940ba37baf559576ed41c51534994e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 58bb9b672b77a1bbd19921531385fd8425681e8b33a62f706c22392f512bf155
[INFO] running `Command { std: "docker" "start" "-a" "58bb9b672b77a1bbd19921531385fd8425681e8b33a62f706c22392f512bf155", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling metrics-rs v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.59s
[INFO] running `Command { std: "docker" "inspect" "58bb9b672b77a1bbd19921531385fd8425681e8b33a62f706c22392f512bf155", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58bb9b672b77a1bbd19921531385fd8425681e8b33a62f706c22392f512bf155", kill_on_drop: false }`
[INFO] [stdout] 58bb9b672b77a1bbd19921531385fd8425681e8b33a62f706c22392f512bf155
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 1d82b90a0ae8c7334a19c93bf372792ec32097b7c5dd1d0d9eb2bf0332f74f60
[INFO] running `Command { std: "docker" "start" "-a" "1d82b90a0ae8c7334a19c93bf372792ec32097b7c5dd1d0d9eb2bf0332f74f60", kill_on_drop: false }`
[INFO] [stderr]    Compiling metrics-rs v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.04s
[INFO] running `Command { std: "docker" "inspect" "1d82b90a0ae8c7334a19c93bf372792ec32097b7c5dd1d0d9eb2bf0332f74f60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d82b90a0ae8c7334a19c93bf372792ec32097b7c5dd1d0d9eb2bf0332f74f60", kill_on_drop: false }`
[INFO] [stdout] 1d82b90a0ae8c7334a19c93bf372792ec32097b7c5dd1d0d9eb2bf0332f74f60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] b1bc72c64f1b793e5da118df46ec6964871e6350443c3ab6f6c892571109159d
[INFO] running `Command { std: "docker" "start" "-a" "b1bc72c64f1b793e5da118df46ec6964871e6350443c3ab6f6c892571109159d", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/metrics_rs-319ad6bd4c2b4046)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests metrics-rs
[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" "b1bc72c64f1b793e5da118df46ec6964871e6350443c3ab6f6c892571109159d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1bc72c64f1b793e5da118df46ec6964871e6350443c3ab6f6c892571109159d", kill_on_drop: false }`
[INFO] [stdout] b1bc72c64f1b793e5da118df46ec6964871e6350443c3ab6f6c892571109159d