[INFO] fetching crate mice 0.10.4...
[INFO] checking mice-0.10.4 against master#0599f3403366d9c57f0625e6de3af214b5042a90 for pr-87710
[INFO] extracting crate mice 0.10.4 into /workspace/builds/worker-20/source
[INFO] validating manifest of crates.io crate mice 0.10.4 on toolchain 0599f3403366d9c57f0625e6de3af214b5042a90
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mice 0.10.4
[INFO] finished tweaking crates.io crate mice 0.10.4
[INFO] tweaked toml for crates.io crate mice 0.10.4 written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ec3d8ab9d68cb6b4e1431174409f853f38be731689a1ce4735e6738b84cb295f
[INFO] running `Command { std: "docker" "start" "-a" "ec3d8ab9d68cb6b4e1431174409f853f38be731689a1ce4735e6738b84cb295f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec3d8ab9d68cb6b4e1431174409f853f38be731689a1ce4735e6738b84cb295f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec3d8ab9d68cb6b4e1431174409f853f38be731689a1ce4735e6738b84cb295f", kill_on_drop: false }`
[INFO] [stdout] ec3d8ab9d68cb6b4e1431174409f853f38be731689a1ce4735e6738b84cb295f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2158f38da415c42caa798842747bad6726f1650acf529fa925f6b17d9b87f7ea
[INFO] running `Command { std: "docker" "start" "-a" "2158f38da415c42caa798842747bad6726f1650acf529fa925f6b17d9b87f7ea", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking id-arena v2.2.1
[INFO] [stderr]     Checking core_extensions v1.4.2
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling serde_derive v1.0.129
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking checked v0.5.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]    Compiling derive-syn-parse v0.1.5
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling derive_more v0.99.16
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]    Compiling mbot_proc_macro_helpers v0.0.1
[INFO] [stderr]     Checking mice v0.10.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stdout] warning: struct is never constructed: `StackProgram`
[INFO] [stdout]   --> benches/tree.rs:40:20
[INFO] [stdout]    |
[INFO] [stdout] 40 |         pub struct StackProgram(Vec<Instruction>);
[INFO] [stdout]    |                    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `count`
[INFO] [stdout]   --> benches/tree.rs:47:17
[INFO] [stdout]    |
[INFO] [stdout] 47 |                 count: i64,
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sides`
[INFO] [stdout]   --> benches/tree.rs:48:17
[INFO] [stdout]    |
[INFO] [stdout] 48 |                 sides: i64,
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `keep_count`
[INFO] [stdout]   --> benches/tree.rs:49:17
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 keep_count: i64,
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.63s
[INFO] running `Command { std: "docker" "inspect" "2158f38da415c42caa798842747bad6726f1650acf529fa925f6b17d9b87f7ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2158f38da415c42caa798842747bad6726f1650acf529fa925f6b17d9b87f7ea", kill_on_drop: false }`
[INFO] [stdout] 2158f38da415c42caa798842747bad6726f1650acf529fa925f6b17d9b87f7ea