[INFO] fetching crate prometheus_folder_size_exporter 0.1.1...
[INFO] checking prometheus_folder_size_exporter-0.1.1 against try#6f12b8fe67b4eed2e838dab803ed9493b9d62c0f for pr-79073
[INFO] extracting crate prometheus_folder_size_exporter 0.1.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate prometheus_folder_size_exporter 0.1.1 on toolchain 6f12b8fe67b4eed2e838dab803ed9493b9d62c0f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate prometheus_folder_size_exporter 0.1.1
[INFO] finished tweaking crates.io crate prometheus_folder_size_exporter 0.1.1
[INFO] tweaked toml for crates.io crate prometheus_folder_size_exporter 0.1.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate prometheus_folder_size_exporter 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded hyper v0.12.23
[INFO] [stderr]   Downloaded http v0.1.15
[INFO] [stderr]   Downloaded serde_json v1.0.37
[INFO] [stderr]   Downloaded crossbeam-channel v0.3.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d7a8f5262041ab3a265c007d57b38f19653ba038407dd57ff630b72c00b70b43
[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" "d7a8f5262041ab3a265c007d57b38f19653ba038407dd57ff630b72c00b70b43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7a8f5262041ab3a265c007d57b38f19653ba038407dd57ff630b72c00b70b43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7a8f5262041ab3a265c007d57b38f19653ba038407dd57ff630b72c00b70b43", kill_on_drop: false }`
[INFO] [stdout] d7a8f5262041ab3a265c007d57b38f19653ba038407dd57ff630b72c00b70b43
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9f0675802f92973af3726143ee3d25b6a9a2c97ac8f452936b034e84f441686f
[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" "9f0675802f92973af3726143ee3d25b6a9a2c97ac8f452936b034e84f441686f", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]    Compiling cc v1.0.28
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]     Checking string v0.1.3
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]     Checking rustc-demangle v0.1.13
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking termcolor v1.0.4
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[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]    Compiling backtrace v0.3.13
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.26
[INFO] [stderr]     Checking humantime v1.2.0
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[INFO] [stderr]     Checking futures-cpupool v0.1.8
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[INFO] [stderr]     Checking smallvec v0.6.8
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking tokio-io v0.1.11
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[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking serde_json v1.0.37
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]     Checking rand v0.6.4
[INFO] [stderr]     Checking h2 v0.1.16
[INFO] [stderr]     Checking parking_lot v0.7.1
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[INFO] [stderr]     Checking tokio-reactor v0.1.8
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking crossbeam v0.6.0
[INFO] [stderr]     Checking tokio-threadpool v0.1.11
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]     Checking tokio v0.1.15
[INFO] [stderr]     Checking hyper v0.12.23
[INFO] [stderr]    Compiling serde_derive v1.0.85
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking prometheus_folder_size_exporter v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `UnsupportedPath`
[INFO] [stdout]  --> src/exporter_error.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     UnsupportedPath { path: String },
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UnsupportedMethod`
[INFO] [stdout]  --> src/exporter_error.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     UnsupportedMethod { verb: String },
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `folders`
[INFO] [stdout]   --> src/folder_scanner.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn folders(&self) -> &[FolderToScan] {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UnsupportedPath`
[INFO] [stdout]  --> src/exporter_error.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     UnsupportedPath { path: String },
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UnsupportedMethod`
[INFO] [stdout]  --> src/exporter_error.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     UnsupportedMethod { verb: String },
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 09s
[INFO] running `Command { std: "docker" "inspect" "9f0675802f92973af3726143ee3d25b6a9a2c97ac8f452936b034e84f441686f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f0675802f92973af3726143ee3d25b6a9a2c97ac8f452936b034e84f441686f", kill_on_drop: false }`
[INFO] [stdout] 9f0675802f92973af3726143ee3d25b6a9a2c97ac8f452936b034e84f441686f