[INFO] cloning repository https://github.com/blt/metrics_histo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/blt/metrics_histo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fblt%2Fmetrics_histo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fblt%2Fmetrics_histo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 170e02df8a4003473f39dcf2da3508c231ebd3ec
[INFO] testing blt/metrics_histo against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fblt%2Fmetrics_histo" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/blt/metrics_histo 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 git repo https://github.com/blt/metrics_histo
[INFO] finished tweaking git repo https://github.com/blt/metrics_histo
[INFO] tweaked toml for git repo https://github.com/blt/metrics_histo written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/blt/metrics_histo already has a lockfile, it will not be regenerated
[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 metrics-macros v0.2.0
[INFO] [stderr]   Downloaded metrics v0.14.2
[INFO] [stderr]   Downloaded sketches-ddsketch v0.1.2
[INFO] [stderr]   Downloaded metrics-util v0.6.2
[INFO] [stderr]   Downloaded quanta v0.7.2
[INFO] [stderr]   Downloaded metrics-tracing-context v0.3.0
[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" "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] a6dba41cc06555e8fcae493cc4044deb6b33c7c022f1eae5a3281adbb18c4ffe
[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" "a6dba41cc06555e8fcae493cc4044deb6b33c7c022f1eae5a3281adbb18c4ffe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6dba41cc06555e8fcae493cc4044deb6b33c7c022f1eae5a3281adbb18c4ffe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6dba41cc06555e8fcae493cc4044deb6b33c7c022f1eae5a3281adbb18c4ffe", kill_on_drop: false }`
[INFO] [stdout] a6dba41cc06555e8fcae493cc4044deb6b33c7c022f1eae5a3281adbb18c4ffe
[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" "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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 71f58b46d299c4246d41fcf1ee1ed2fd8caf7a6b93256c5fcbc28ca11c1a9bbb
[INFO] running `Command { std: "docker" "start" "-a" "71f58b46d299c4246d41fcf1ee1ed2fd8caf7a6b93256c5fcbc28ca11c1a9bbb", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling syn v1.0.68
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling metrics v0.14.2
[INFO] [stderr]    Compiling pin-project-lite v0.2.6
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling sketches-ddsketch v0.1.2
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling tokio v1.4.0
[INFO] [stderr]    Compiling tracing-core v0.1.17
[INFO] [stderr]    Compiling lock_api v0.4.3
[INFO] [stderr]    Compiling sharded-slab v0.1.1
[INFO] [stderr]    Compiling instant v0.1.9
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling signal-hook-registry v1.3.0
[INFO] [stderr]    Compiling raw-cpuid v9.0.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling mio v0.7.11
[INFO] [stderr]    Compiling tracing-log v0.1.2
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling dashmap v4.0.2
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling quanta v0.7.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.3
[INFO] [stderr]    Compiling ordered-float v2.1.1
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling regex v1.4.5
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling twox-hash v1.6.0
[INFO] [stderr]    Compiling matchers v0.0.1
[INFO] [stderr]    Compiling tracing-serde v0.1.2
[INFO] [stderr]    Compiling metrics-macros v0.2.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling metrics-util v0.6.2
[INFO] [stderr]    Compiling tracing v0.1.25
[INFO] [stderr]    Compiling tracing-subscriber v0.2.17
[INFO] [stderr]    Compiling metrics-tracing-context v0.3.0
[INFO] [stderr]    Compiling metrics_histo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 59.08s
[INFO] running `Command { std: "docker" "inspect" "71f58b46d299c4246d41fcf1ee1ed2fd8caf7a6b93256c5fcbc28ca11c1a9bbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71f58b46d299c4246d41fcf1ee1ed2fd8caf7a6b93256c5fcbc28ca11c1a9bbb", kill_on_drop: false }`
[INFO] [stdout] 71f58b46d299c4246d41fcf1ee1ed2fd8caf7a6b93256c5fcbc28ca11c1a9bbb
[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" "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] 559d1417367eb12f92661e471ec8d8eaeafa845bf85faad560533b0232e584cd
[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" "559d1417367eb12f92661e471ec8d8eaeafa845bf85faad560533b0232e584cd", kill_on_drop: false }`
[INFO] [stderr]    Compiling metrics_histo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.03s
[INFO] running `Command { std: "docker" "inspect" "559d1417367eb12f92661e471ec8d8eaeafa845bf85faad560533b0232e584cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "559d1417367eb12f92661e471ec8d8eaeafa845bf85faad560533b0232e584cd", kill_on_drop: false }`
[INFO] [stdout] 559d1417367eb12f92661e471ec8d8eaeafa845bf85faad560533b0232e584cd
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen", 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] 58ee62fd9ddd91e3c07732e64435c72c8cab4e31650790fef4598c6cfbe42d3e
[INFO] running `Command { std: "docker" "start" "-a" "58ee62fd9ddd91e3c07732e64435c72c8cab4e31650790fef4598c6cfbe42d3e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.56s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/metrics_histo-0ccfc38bbbe13052)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/metrics_histo-cab06831c5fd6462)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    Doc-tests metrics_histo
[INFO] [stdout] 
[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] [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" "58ee62fd9ddd91e3c07732e64435c72c8cab4e31650790fef4598c6cfbe42d3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58ee62fd9ddd91e3c07732e64435c72c8cab4e31650790fef4598c6cfbe42d3e", kill_on_drop: false }`
[INFO] [stdout] 58ee62fd9ddd91e3c07732e64435c72c8cab4e31650790fef4598c6cfbe42d3e