[INFO] cloning repository https://github.com/jcaesar/cgroup-memory-prometheus-ex [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jcaesar/cgroup-memory-prometheus-ex" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjcaesar%2Fcgroup-memory-prometheus-ex", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjcaesar%2Fcgroup-memory-prometheus-ex'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 2ab71cb85244a812c25b0509ab6bea0bb9395389 [INFO] checking jcaesar/cgroup-memory-prometheus-ex against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjcaesar%2Fcgroup-memory-prometheus-ex" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/jcaesar/cgroup-memory-prometheus-ex [INFO] finished tweaking git repo https://github.com/jcaesar/cgroup-memory-prometheus-ex [INFO] tweaked toml for git repo https://github.com/jcaesar/cgroup-memory-prometheus-ex written to /workspace/builds/worker-6-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/jcaesar/cgroup-memory-prometheus-ex 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/jcaesar/cgroup-memory-prometheus-ex 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] Blocking waiting for file lock on package cache [INFO] [stderr] Updating crates.io index [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded proc-macro-error-attr v0.4.5 [INFO] [stderr] Downloaded hermit-abi v0.1.6 [INFO] [stderr] Downloaded rustversion v1.0.2 [INFO] [stderr] Downloaded proc-macro-error v0.4.5 [INFO] [stderr] Downloaded syn-mid v0.4.0 [INFO] [stderr] Downloaded structopt-derive v0.4.1 [INFO] [stderr] Downloaded tokio-executor v0.1.9 [INFO] [stderr] Downloaded either v1.5.3 [INFO] [stderr] Downloaded scopeguard v1.0.0 [INFO] [stderr] Downloaded pathdiff v0.1.0 [INFO] [stderr] Downloaded autocfg v0.1.7 [INFO] [stderr] Downloaded itoa v0.4.5 [INFO] [stderr] Downloaded failure_derive v0.1.6 [INFO] [stderr] Downloaded synstructure v0.12.3 [INFO] [stderr] Downloaded cgroups v0.1.0 [INFO] [stderr] Downloaded rustc-demangle v0.1.16 [INFO] [stderr] Downloaded cc v1.0.50 [INFO] [stderr] Downloaded tokio-timer v0.2.12 [INFO] [stderr] Downloaded prometheus v0.7.0 [INFO] [stderr] Downloaded backtrace v0.3.42 [INFO] [stderr] Downloaded crossbeam-channel v0.3.9 [INFO] [stderr] Downloaded h2 v0.1.26 [INFO] [stderr] Downloaded mio v0.6.21 [INFO] [stderr] Downloaded futures v0.1.29 [INFO] [stderr] Downloaded hyper v0.12.35 [INFO] [stderr] Downloaded syn v1.0.14 [INFO] [stderr] Downloaded failure v0.1.6 [INFO] [stderr] Downloaded indexmap v1.3.1 [INFO] [stderr] Downloaded tokio v0.1.22 [INFO] [stderr] Downloaded parking_lot v0.9.0 [INFO] [stderr] Downloaded libc v0.2.66 [INFO] [stderr] Downloaded tokio-sync v0.1.7 [INFO] [stderr] Downloaded backtrace-sys v0.1.32 [INFO] [stderr] Downloaded crossbeam-epoch v0.8.0 [INFO] [stderr] Downloaded tokio-threadpool v0.1.17 [INFO] [stderr] Downloaded httparse v1.3.4 [INFO] [stderr] Downloaded time v0.1.42 [INFO] [stderr] Downloaded protobuf v2.10.1 [INFO] [stderr] Downloaded tokio-current-thread v0.1.6 [INFO] [stderr] Downloaded miow v0.2.1 [INFO] [stderr] Downloaded redox_syscall v0.1.56 [INFO] [stderr] Downloaded parking_lot_core v0.6.2 [INFO] [stderr] Downloaded crossbeam-queue v0.1.2 [INFO] [stderr] Downloaded num_cpus v1.12.0 [INFO] [stderr] Downloaded crossbeam-utils v0.6.6 [INFO] [stderr] Downloaded tokio-buf v0.1.1 [INFO] [stderr] Downloaded lock_api v0.3.3 [INFO] [stderr] Downloaded byteorder v1.3.2 [INFO] [stderr] Downloaded tokio-reactor v0.1.11 [INFO] [stderr] Downloaded memoffset v0.5.3 [INFO] [stderr] Downloaded crossbeam-utils v0.7.0 [INFO] [stderr] Downloaded tokio-io v0.1.12 [INFO] [stderr] Downloaded smallvec v0.6.13 [INFO] [stderr] Downloaded structopt v0.3.8 [INFO] [stderr] Downloaded net2 v0.2.33 [INFO] [stderr] Downloaded cloudabi v0.0.3 [INFO] [stderr] Downloaded crossbeam-deque v0.7.2 [INFO] [stderr] Downloaded string v0.2.1 [INFO] [stderr] Downloaded http-body v0.1.0 [INFO] [stderr] Downloaded tokio-tcp v0.1.3 [INFO] [stderr] Downloaded want v0.2.0 [INFO] [stderr] Downloaded spin v0.5.2 [INFO] [stderr] Downloaded prometheus_exporter v0.4.1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] ace740d3bd9b903d2098e571eeb542aa96ddafaa3ad860a713d1181bed3d35f3 [INFO] running `Command { std: "docker" "start" "-a" "ace740d3bd9b903d2098e571eeb542aa96ddafaa3ad860a713d1181bed3d35f3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ace740d3bd9b903d2098e571eeb542aa96ddafaa3ad860a713d1181bed3d35f3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ace740d3bd9b903d2098e571eeb542aa96ddafaa3ad860a713d1181bed3d35f3", kill_on_drop: false }` [INFO] [stdout] ace740d3bd9b903d2098e571eeb542aa96ddafaa3ad860a713d1181bed3d35f3 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 3e176f19d850f8815f80ac10f97e28f74a860977e40b3700d1bcb88326509aef [INFO] running `Command { std: "docker" "start" "-a" "3e176f19d850f8815f80ac10f97e28f74a860977e40b3700d1bcb88326509aef", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.66 [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Checking futures v0.1.29 [INFO] [stderr] Compiling byteorder v1.3.2 [INFO] [stderr] Compiling log v0.4.8 [INFO] [stderr] Compiling syn v1.0.14 [INFO] [stderr] Checking either v1.5.3 [INFO] [stderr] Compiling autocfg v0.1.7 [INFO] [stderr] Compiling maybe-uninit v2.0.0 [INFO] [stderr] Checking fnv v1.0.6 [INFO] [stderr] Checking scopeguard v1.0.0 [INFO] [stderr] Compiling rustversion v1.0.2 [INFO] [stderr] Checking crossbeam-utils v0.6.6 [INFO] [stderr] Checking itoa v0.4.5 [INFO] [stderr] Compiling indexmap v1.3.1 [INFO] [stderr] Compiling cc v1.0.50 [INFO] [stderr] Compiling httparse v1.3.4 [INFO] [stderr] Compiling semver v0.9.0 [INFO] [stderr] Checking lock_api v0.3.3 [INFO] [stderr] Compiling protobuf v2.10.1 [INFO] [stderr] Checking try-lock v0.2.2 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stderr] Checking smallvec v0.6.13 [INFO] [stderr] Compiling prometheus v0.7.0 [INFO] [stderr] Compiling failure_derive v0.1.6 [INFO] [stderr] Checking rustc-demangle v0.1.16 [INFO] [stderr] Compiling crossbeam-utils v0.7.0 [INFO] [stderr] Compiling crossbeam-epoch v0.8.0 [INFO] [stderr] Checking crossbeam-queue v0.1.2 [INFO] [stderr] Checking spin v0.5.2 [INFO] [stderr] Compiling parking_lot_core v0.6.2 [INFO] [stderr] Compiling memoffset v0.5.3 [INFO] [stderr] Compiling parking_lot v0.9.0 [INFO] [stderr] Compiling hyper v0.12.35 [INFO] [stderr] Checking quick-error v1.2.3 [INFO] [stderr] Checking crossbeam-channel v0.3.9 [INFO] [stderr] Checking cgroups v0.1.0 [INFO] [stderr] Checking pathdiff v0.1.0 [INFO] [stderr] Checking iovec v0.1.4 [INFO] [stderr] Checking num_cpus v1.12.0 [INFO] [stderr] Checking bytes v0.4.12 [INFO] [stderr] Checking net2 v0.2.33 [INFO] [stderr] Checking time v0.1.42 [INFO] [stderr] Checking atty v0.2.14 [INFO] [stderr] Checking clap v2.33.0 [INFO] [stderr] Compiling backtrace-sys v0.1.32 [INFO] [stderr] Checking mio v0.6.21 [INFO] [stderr] Checking http v0.1.21 [INFO] [stderr] Checking string v0.2.1 [INFO] [stderr] Checking crossbeam-deque v0.7.2 [INFO] [stderr] Checking tokio-executor v0.1.9 [INFO] [stderr] Checking tokio-io v0.1.12 [INFO] [stderr] Checking tokio-sync v0.1.7 [INFO] [stderr] Checking tokio-buf v0.1.1 [INFO] [stderr] Checking want v0.2.0 [INFO] [stderr] Checking futures-cpupool v0.1.8 [INFO] [stderr] Checking tokio-timer v0.2.12 [INFO] [stderr] Checking tokio-threadpool v0.1.17 [INFO] [stderr] Checking tokio-current-thread v0.1.6 [INFO] [stderr] Checking tokio-reactor v0.1.11 [INFO] [stderr] Checking backtrace v0.3.42 [INFO] [stderr] Checking tokio v0.1.22 [INFO] [stderr] Checking tokio-tcp v0.1.3 [INFO] [stderr] Checking http-body v0.1.0 [INFO] [stderr] Checking h2 v0.1.26 [INFO] [stderr] Compiling syn-mid v0.4.0 [INFO] [stderr] Compiling synstructure v0.12.3 [INFO] [stderr] Compiling proc-macro-error v0.4.5 [INFO] [stderr] Compiling proc-macro-error-attr v0.4.5 [INFO] [stderr] Checking prometheus_exporter v0.4.1 [INFO] [stderr] Compiling structopt-derive v0.4.1 [INFO] [stderr] Checking failure v0.1.6 [INFO] [stderr] Checking structopt v0.3.8 [INFO] [stderr] Checking cgroups v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: for loop over a `Result`. This is more readably written as an `if let` statement [INFO] [stdout] --> main.rs:58:57 [INFO] [stdout] | [INFO] [stdout] 58 | for entry in fs::read_dir(mem.path())? { for entry in entry { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(for_loops_over_fallibles)]` on by default [INFO] [stdout] help: to check pattern in a loop use `while let` [INFO] [stdout] | [INFO] [stdout] 58 - for entry in fs::read_dir(mem.path())? { for entry in entry { [INFO] [stdout] 58 + for entry in fs::read_dir(mem.path())? { while let Ok(entry) = entry { [INFO] [stdout] | [INFO] [stdout] help: consider using `if let` to clear intent [INFO] [stdout] | [INFO] [stdout] 58 - for entry in fs::read_dir(mem.path())? { for entry in entry { [INFO] [stdout] 58 + for entry in fs::read_dir(mem.path())? { if let Ok(entry) = entry { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: for loop over a `Result`. This is more readably written as an `if let` statement [INFO] [stdout] --> main.rs:58:57 [INFO] [stdout] | [INFO] [stdout] 58 | for entry in fs::read_dir(mem.path())? { for entry in entry { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(for_loops_over_fallibles)]` on by default [INFO] [stdout] help: to check pattern in a loop use `while let` [INFO] [stdout] | [INFO] [stdout] 58 - for entry in fs::read_dir(mem.path())? { for entry in entry { [INFO] [stdout] 58 + for entry in fs::read_dir(mem.path())? { while let Ok(entry) = entry { [INFO] [stdout] | [INFO] [stdout] help: consider using `if let` to clear intent [INFO] [stdout] | [INFO] [stdout] 58 - for entry in fs::read_dir(mem.path())? { for entry in entry { [INFO] [stdout] 58 + for entry in fs::read_dir(mem.path())? { if let Ok(entry) = entry { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.96s [INFO] running `Command { std: "docker" "inspect" "3e176f19d850f8815f80ac10f97e28f74a860977e40b3700d1bcb88326509aef", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3e176f19d850f8815f80ac10f97e28f74a860977e40b3700d1bcb88326509aef", kill_on_drop: false }` [INFO] [stdout] 3e176f19d850f8815f80ac10f97e28f74a860977e40b3700d1bcb88326509aef