[INFO] fetching crate witchcraft-metrics 0.2.0...
[INFO] testing witchcraft-metrics-0.2.0 against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] extracting crate witchcraft-metrics 0.2.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate witchcraft-metrics 0.2.0 on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate witchcraft-metrics 0.2.0
[INFO] finished tweaking crates.io crate witchcraft-metrics 0.2.0
[INFO] tweaked toml for crates.io crate witchcraft-metrics 0.2.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded assert_approx_eq v1.1.0
[INFO] [stderr]   Downloaded exponential-decay-histogram v0.1.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4cb7c8cc55fb0b9a25c3a9eaa590ba7e3e8dae29f79bde0d40d5016dc50336dc
[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" "4cb7c8cc55fb0b9a25c3a9eaa590ba7e3e8dae29f79bde0d40d5016dc50336dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4cb7c8cc55fb0b9a25c3a9eaa590ba7e3e8dae29f79bde0d40d5016dc50336dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cb7c8cc55fb0b9a25c3a9eaa590ba7e3e8dae29f79bde0d40d5016dc50336dc", kill_on_drop: false }`
[INFO] [stdout] 4cb7c8cc55fb0b9a25c3a9eaa590ba7e3e8dae29f79bde0d40d5016dc50336dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b64c9a04ac411716b46df0fb9a0144c5a640d2f07f4498aecbdfd52239edbab
[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" "5b64c9a04ac411716b46df0fb9a0144c5a640d2f07f4498aecbdfd52239edbab", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling serde-value v0.7.0
[INFO] [stderr]    Compiling exponential-decay-histogram v0.1.9
[INFO] [stderr]    Compiling witchcraft-metrics v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.98s
[INFO] running `Command { std: "docker" "inspect" "5b64c9a04ac411716b46df0fb9a0144c5a640d2f07f4498aecbdfd52239edbab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b64c9a04ac411716b46df0fb9a0144c5a640d2f07f4498aecbdfd52239edbab", kill_on_drop: false }`
[INFO] [stdout] 5b64c9a04ac411716b46df0fb9a0144c5a640d2f07f4498aecbdfd52239edbab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a139d6ec9a525786efa6d5e74baa7111fccf4ae60458530160caa5f82006bbc8
[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" "a139d6ec9a525786efa6d5e74baa7111fccf4ae60458530160caa5f82006bbc8", kill_on_drop: false }`
[INFO] [stderr]    Compiling assert_approx_eq v1.1.0
[INFO] [stderr]    Compiling witchcraft-metrics v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.87s
[INFO] running `Command { std: "docker" "inspect" "a139d6ec9a525786efa6d5e74baa7111fccf4ae60458530160caa5f82006bbc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a139d6ec9a525786efa6d5e74baa7111fccf4ae60458530160caa5f82006bbc8", kill_on_drop: false }`
[INFO] [stdout] a139d6ec9a525786efa6d5e74baa7111fccf4ae60458530160caa5f82006bbc8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 172cda94caa7db1686dada6f0b5ae1e8fdcb42e2d456ab830d2a084524c2aa4c
[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" "172cda94caa7db1686dada6f0b5ae1e8fdcb42e2d456ab830d2a084524c2aa4c", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stdout] running 12 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/witchcraft_metrics-ab8d52d29617e245)
[INFO] [stdout] test gauge::test::downcast ... ok
[INFO] [stdout] test registry::test::tagged_distinct_from_untagged ... ok
[INFO] [stdout] test meter::test::marks_events_and_updates_rate_and_count ... ok
[INFO] [stdout] test reservoir::test::exponential_basic ... ok
[INFO] [stdout] test timer::test::basic ... ok
[INFO] [stdout] test histogram::test::basic ... ok
[INFO] [stdout] test meter::test::starts_out_with_no_rates_or_count ... ok
[INFO] [stdout] test registry::test::metrics_returns_snapshot ... ok
[INFO] [stdout] test registry::test::first_metric_wins ... ok
[INFO] [stdout] test metric_id::test::basic ... ok
[INFO] [stdout] test counter::test::basic ... ok
[INFO] [stderr]    Doc-tests witchcraft-metrics
[INFO] [stdout] test timer::test::time ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/registry.rs - registry::MetricRegistry (line 42) ... ok
[INFO] [stdout] test src/lib.rs - (line 20) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.19s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "172cda94caa7db1686dada6f0b5ae1e8fdcb42e2d456ab830d2a084524c2aa4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "172cda94caa7db1686dada6f0b5ae1e8fdcb42e2d456ab830d2a084524c2aa4c", kill_on_drop: false }`
[INFO] [stdout] 172cda94caa7db1686dada6f0b5ae1e8fdcb42e2d456ab830d2a084524c2aa4c