[INFO] fetching crate roughenough 1.1.8...
[INFO] checking roughenough-1.1.8 against beta for pr-78714
[INFO] extracting crate roughenough 1.1.8 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate roughenough 1.1.8 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate roughenough 1.1.8
[INFO] finished tweaking crates.io crate roughenough 1.1.8
[INFO] tweaked toml for crates.io crate roughenough 1.1.8 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate roughenough 1.1.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc587150988894f2bcb9a0c4ff2f0596d733287edbfdc90d580143f9cb422692
[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" "cc587150988894f2bcb9a0c4ff2f0596d733287edbfdc90d580143f9cb422692", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc587150988894f2bcb9a0c4ff2f0596d733287edbfdc90d580143f9cb422692", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc587150988894f2bcb9a0c4ff2f0596d733287edbfdc90d580143f9cb422692", kill_on_drop: false }`
[INFO] [stdout] cc587150988894f2bcb9a0c4ff2f0596d733287edbfdc90d580143f9cb422692
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c63e5dea9701d031bc723b556a96ce7fb985779ccc8957a1e8c22a5bc7f98ee
[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" "5c63e5dea9701d031bc723b556a96ce7fb985779ccc8957a1e8c22a5bc7f98ee", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking oorandom v11.1.0
[INFO] [stderr]    Compiling ring v0.13.5
[INFO] [stderr]     Checking plotters v0.2.12
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking criterion-plot v0.4.1
[INFO] [stderr]     Checking bstr v0.2.12
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking tinytemplate v1.0.3
[INFO] [stderr]     Checking regex v1.3.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking nix v0.17.0
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking simple_logger v1.6.0
[INFO] [stderr]     Checking ctrlc v3.1.4
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]     Checking roughenough v1.1.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion v0.3.1
[INFO] [stdout] warning: unused import: `root_from_paths`
[INFO] [stdout]  --> benches/roughenough-bench.rs:8:39
[INFO] [stdout]   |
[INFO] [stdout] 8 | use roughenough::merkle::{MerkleTree, root_from_paths};
[INFO] [stdout]   |                                       ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 54.98s
[INFO] running `Command { std: "docker" "inspect" "5c63e5dea9701d031bc723b556a96ce7fb985779ccc8957a1e8c22a5bc7f98ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c63e5dea9701d031bc723b556a96ce7fb985779ccc8957a1e8c22a5bc7f98ee", kill_on_drop: false }`
[INFO] [stdout] 5c63e5dea9701d031bc723b556a96ce7fb985779ccc8957a1e8c22a5bc7f98ee