[INFO] fetching crate serde_prometheus 0.1.5...
[INFO] testing serde_prometheus-0.1.5 against 1.52.1 for beta-1.52-2
[INFO] extracting crate serde_prometheus 0.1.5 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate serde_prometheus 0.1.5 on toolchain 1.52.1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.52.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_prometheus 0.1.5
[INFO] finished tweaking crates.io crate serde_prometheus 0.1.5
[INFO] tweaked toml for crates.io crate serde_prometheus 0.1.5 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate serde_prometheus 0.1.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.52.1" "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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+1.52.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1fec929bc69ab1e97262b8359af94656c4a5c04c17d404861b7bb87643f95c71
[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" "1fec929bc69ab1e97262b8359af94656c4a5c04c17d404861b7bb87643f95c71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1fec929bc69ab1e97262b8359af94656c4a5c04c17d404861b7bb87643f95c71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fec929bc69ab1e97262b8359af94656c4a5c04c17d404861b7bb87643f95c71", kill_on_drop: false }`
[INFO] [stdout] 1fec929bc69ab1e97262b8359af94656c4a5c04c17d404861b7bb87643f95c71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+1.52.1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6a5f74e3156e44712df4d2d7d7ae757ff04dd7c54a7576a82402ed5ba577e5bb
[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" "6a5f74e3156e44712df4d2d7d7ae757ff04dd7c54a7576a82402ed5ba577e5bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.20
[INFO] [stderr]    Compiling ftoa v0.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.110
[INFO] [stderr]    Compiling snafu-derive v0.6.8
[INFO] [stderr]    Compiling snafu v0.6.8
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]    Compiling serde_prometheus v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.56s
[INFO] running `Command { std: "docker" "inspect" "6a5f74e3156e44712df4d2d7d7ae757ff04dd7c54a7576a82402ed5ba577e5bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a5f74e3156e44712df4d2d7d7ae757ff04dd7c54a7576a82402ed5ba577e5bb", kill_on_drop: false }`
[INFO] [stdout] 6a5f74e3156e44712df4d2d7d7ae757ff04dd7c54a7576a82402ed5ba577e5bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+1.52.1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 91be7b43e1ede234f806a3d75cdcf7e854b95a6872ed99ab21fdd14980d84426
[INFO] running `Command { std: "docker" "start" "-a" "91be7b43e1ede234f806a3d75cdcf7e854b95a6872ed99ab21fdd14980d84426", kill_on_drop: false }`
[INFO] [stderr]    Compiling auto_enums_derive v0.5.10
[INFO] [stderr]    Compiling arc-swap v0.4.6
[INFO] [stderr]    Compiling atomic v0.4.5
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.34
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling flate2 v1.0.14
[INFO] [stderr]    Compiling parking_lot_core v0.7.2
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling derive_utils v0.9.1
[INFO] [stderr]    Compiling auto_enums_core v0.5.10
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling parking_lot v0.10.2
[INFO] [stderr]    Compiling signal-hook-registry v1.2.0
[INFO] [stderr]    Compiling mio v0.6.22
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling hdrhistogram v7.1.0
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling tokio v0.2.20
[INFO] [stderr]    Compiling auto_enums v0.5.10
[INFO] [stderr]    Compiling synattra v0.2.0
[INFO] [stderr]    Compiling aspect-weave v0.2.0
[INFO] [stderr]    Compiling aspect v0.2.0
[INFO] [stderr]    Compiling metered-macro v0.4.0
[INFO] [stderr]    Compiling metered v0.4.0
[INFO] [stderr]    Compiling serde_prometheus v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 53.82s
[INFO] running `Command { std: "docker" "inspect" "91be7b43e1ede234f806a3d75cdcf7e854b95a6872ed99ab21fdd14980d84426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91be7b43e1ede234f806a3d75cdcf7e854b95a6872ed99ab21fdd14980d84426", kill_on_drop: false }`
[INFO] [stdout] 91be7b43e1ede234f806a3d75cdcf7e854b95a6872ed99ab21fdd14980d84426
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+1.52.1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4ed2d8e191cc7e8961fb4457179c7f1c5628c39f0701ced7f22b9dbc5ee2e7e6
[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" "4ed2d8e191cc7e8961fb4457179c7f1c5628c39f0701ced7f22b9dbc5ee2e7e6", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/serde_prometheus-ddf7b9f2f99dc3b2)
[INFO] [stdout] running 8 tests
[INFO] [stdout] test label::tests::invalid_key ... ok
[INFO] [stdout] test label::tests::quoted_value ... ok
[INFO] [stdout] test label::tests::single_map ... ok
[INFO] [stdout] test label::tests::multi_map ... ok
[INFO] [stdout] test label::tests::multi_struct ... ok
[INFO] [stdout] test label::tests::single_struct ... ok
[INFO] [stderr]    Doc-tests serde_prometheus
[INFO] [stdout] test tests::normal_registry ... ok
[INFO] [stdout] test tests::wrapped_registry ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/lib.rs - (line 53) ... ok
[INFO] [stdout] test src/lib.rs - (line 158) ... ok
[INFO] [stdout] test src/lib.rs - (line 16) ... ok
[INFO] [stdout] test src/lib.rs - (line 93) ... ok
[INFO] [stdout] test src/lib.rs - (line 219) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 6.75s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4ed2d8e191cc7e8961fb4457179c7f1c5628c39f0701ced7f22b9dbc5ee2e7e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ed2d8e191cc7e8961fb4457179c7f1c5628c39f0701ced7f22b9dbc5ee2e7e6", kill_on_drop: false }`
[INFO] [stdout] 4ed2d8e191cc7e8961fb4457179c7f1c5628c39f0701ced7f22b9dbc5ee2e7e6