[INFO] fetching crate blunders-engine 0.1.0...
[INFO] checking blunders-engine-0.1.0 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate blunders-engine 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate blunders-engine 0.1.0 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate blunders-engine 0.1.0
[INFO] finished tweaking crates.io crate blunders-engine 0.1.0
[INFO] tweaked toml for crates.io crate blunders-engine 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", 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] 7b198c5786d3bcc69d91ec57646e102af104863d265d211c52433fe12670a6b6
[INFO] running `Command { std: "docker" "start" "-a" "7b198c5786d3bcc69d91ec57646e102af104863d265d211c52433fe12670a6b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b198c5786d3bcc69d91ec57646e102af104863d265d211c52433fe12670a6b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b198c5786d3bcc69d91ec57646e102af104863d265d211c52433fe12670a6b6", kill_on_drop: false }`
[INFO] [stdout] 7b198c5786d3bcc69d91ec57646e102af104863d265d211c52433fe12670a6b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80e3bd27e0e48a19c13497b35839932274873dcbb768335029331bb492d20208
[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" "80e3bd27e0e48a19c13497b35839932274873dcbb768335029331bb492d20208", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling serde_json v1.0.72
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.15
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking crossbeam-utils v0.8.5
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.5
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking rayon-core v1.9.1
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking blunders-engine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stdout] warning: field is never read: `id`
[INFO] [stdout]   --> src/threads.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub id: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/threads.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `threads`
[INFO] [stdout]   --> src/threads.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     threads: Vec<Thread>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stdout] warning: field is never read: `id`
[INFO] [stdout]   --> src/threads.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub id: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/threads.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `threads`
[INFO] [stdout]   --> src/threads.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     threads: Vec<Thread>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.90s
[INFO] running `Command { std: "docker" "inspect" "80e3bd27e0e48a19c13497b35839932274873dcbb768335029331bb492d20208", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80e3bd27e0e48a19c13497b35839932274873dcbb768335029331bb492d20208", kill_on_drop: false }`
[INFO] [stdout] 80e3bd27e0e48a19c13497b35839932274873dcbb768335029331bb492d20208