[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] checking blt/metrics_histo against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fblt%2Fmetrics_histo" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[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-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/blt/metrics_histo on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/blt/metrics_histo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-serde v0.1.2
[INFO] [stderr]   Downloaded matchers v0.0.1
[INFO] [stderr]   Downloaded tokio-macros v1.1.0
[INFO] [stderr]   Downloaded sharded-slab v0.1.1
[INFO] [stderr]   Downloaded metrics-tracing-context v0.3.0
[INFO] [stderr]   Downloaded tracing-subscriber v0.2.17
[INFO] [stderr]   Downloaded metrics-macros v0.2.0
[INFO] [stderr]   Downloaded metrics v0.14.2
[INFO] [stderr]   Downloaded raw-cpuid v9.0.0
[INFO] [stderr]   Downloaded quanta v0.7.2
[INFO] [stderr]   Downloaded sketches-ddsketch v0.1.2
[INFO] [stderr]   Downloaded metrics-util v0.6.2
[INFO] [stderr]   Downloaded ordered-float v2.1.1
[INFO] [stderr]   Downloaded atomic-shim v0.1.0
[INFO] [stderr]   Downloaded ctor v0.1.20
[INFO] [stderr]   Downloaded syn v1.0.68
[INFO] [stderr]   Downloaded libc v0.2.92
[INFO] [stderr]   Downloaded tokio v1.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c72efc2133f1562e287fa0d196759eb885e9dba3e7a133aaf36e25616aade72b
[INFO] running `Command { std: "docker" "start" "-a" "c72efc2133f1562e287fa0d196759eb885e9dba3e7a133aaf36e25616aade72b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c72efc2133f1562e287fa0d196759eb885e9dba3e7a133aaf36e25616aade72b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c72efc2133f1562e287fa0d196759eb885e9dba3e7a133aaf36e25616aade72b", kill_on_drop: false }`
[INFO] [stdout] c72efc2133f1562e287fa0d196759eb885e9dba3e7a133aaf36e25616aade72b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a78e8bf73447f984b0788f313bed8a9f00d13054e88d7d3c6c3f0cba5cd73047
[INFO] running `Command { std: "docker" "start" "-a" "a78e8bf73447f984b0788f313bed8a9f00d13054e88d7d3c6c3f0cba5cd73047", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.92
[INFO] [stderr]    Compiling syn v1.0.68
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]     Checking lock_api v0.4.3
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling metrics v0.14.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking raw-cpuid v9.0.0
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking atomic-shim v0.1.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking quanta v0.7.2
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking crossbeam-epoch v0.9.3
[INFO] [stderr]     Checking dashmap v4.0.2
[INFO] [stderr]     Checking tracing-log v0.1.2
[INFO] [stderr]     Checking ordered-float v2.1.1
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking sharded-slab v0.1.1
[INFO] [stderr]    Compiling tokio v1.4.0
[INFO] [stderr]     Checking sketches-ddsketch v0.1.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking mio v0.7.11
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]     Checking twox-hash v1.6.0
[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]     Checking tracing v0.1.25
[INFO] [stderr]     Checking tracing-subscriber v0.2.17
[INFO] [stderr]     Checking metrics-util v0.6.2
[INFO] [stderr]     Checking metrics-tracing-context v0.3.0
[INFO] [stderr]     Checking metrics_histo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> src/main.rs:30:21
[INFO] [stdout]    |
[INFO] [stdout] 30 |                     drop(handle.read_counter());
[INFO] [stdout]    |                     ^^^^^---------------------^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          argument has type `u64`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 30 -                     drop(handle.read_counter());
[INFO] [stdout] 30 +                     let _ = handle.read_counter();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> src/main.rs:33:21
[INFO] [stdout]    |
[INFO] [stdout] 33 |                     drop(handle.read_gauge());
[INFO] [stdout]    |                     ^^^^^-------------------^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          argument has type `f64`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 33 -                     drop(handle.read_gauge());
[INFO] [stdout] 33 +                     let _ = handle.read_gauge();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> src/main.rs:30:21
[INFO] [stdout]    |
[INFO] [stdout] 30 |                     drop(handle.read_counter());
[INFO] [stdout]    |                     ^^^^^---------------------^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          argument has type `u64`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 30 -                     drop(handle.read_counter());
[INFO] [stdout] 30 +                     let _ = handle.read_counter();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> src/main.rs:33:21
[INFO] [stdout]    |
[INFO] [stdout] 33 |                     drop(handle.read_gauge());
[INFO] [stdout]    |                     ^^^^^-------------------^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          argument has type `f64`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 33 -                     drop(handle.read_gauge());
[INFO] [stdout] 33 +                     let _ = handle.read_gauge();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 34.21s
[INFO] running `Command { std: "docker" "inspect" "a78e8bf73447f984b0788f313bed8a9f00d13054e88d7d3c6c3f0cba5cd73047", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a78e8bf73447f984b0788f313bed8a9f00d13054e88d7d3c6c3f0cba5cd73047", kill_on_drop: false }`
[INFO] [stdout] a78e8bf73447f984b0788f313bed8a9f00d13054e88d7d3c6c3f0cba5cd73047
