[INFO] updating cached repository https://github.com/WindSoilder/kvs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4f88e74bbe8e22eb5d0f3a3891cf77c380d39ec2
[INFO] checking WindSoilder/kvs against master#ba72b15666b2491415aec703a02c2364fe5e2790 for pr-71140
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWindSoilder%2Fkvs" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/WindSoilder/kvs on toolchain ba72b15666b2491415aec703a02c2364fe5e2790
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/WindSoilder/kvs
[INFO] finished tweaking git repo https://github.com/WindSoilder/kvs
[INFO] tweaked toml for git repo https://github.com/WindSoilder/kvs written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/WindSoilder/kvs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4885ec871fd4a273e52c7306423e88b0459166acf37d6aea447ca3d1e8c1cb09
[INFO] running `"docker" "start" "-a" "4885ec871fd4a273e52c7306423e88b0459166acf37d6aea447ca3d1e8c1cb09"`
[INFO] [stderr]     Checking panic-control v0.1.4
[INFO] [stderr]    Compiling bincode v1.1.4
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking num_cpus v1.11.0
[INFO] [stderr]     Checking criterion-plot v0.3.1
[INFO] [stderr]     Checking rand_xoshiro v0.1.0
[INFO] [stderr]     Checking float-cmp v0.4.0
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking rand v0.7.1
[INFO] [stderr]     Checking crossbeam-epoch v0.8.0
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking serde v1.0.100
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.2
[INFO] [stderr]     Checking rayon-core v1.6.0
[INFO] [stderr]     Checking rayon v1.2.0
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking serde_bytes v0.11.2
[INFO] [stderr]     Checking bstr v0.2.8
[INFO] [stderr]     Checking sled v0.29.1
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking escargot v0.4.0
[INFO] [stderr]     Checking tinytemplate v1.0.2
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Checking kvs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `black_box`
[INFO] [stderr]  --> src/benches/my_benchmark.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use criterion::{black_box, criterion_group, criterion_main, Criterion};
[INFO] [stderr]   |                 ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::Zip`
[INFO] [stderr]  --> src/benches/my_benchmark.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::iter::Zip;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/benches/my_benchmark.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let mut engine: KvStore = KvStore::open(temp_dir.path()).unwrap();
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/benches/my_benchmark.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |     let mut engine: KvStore = KvStore::open(temp_dir.path()).unwrap();
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/benches/my_benchmark.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |     let mut engine: SledKvsEngine = SledKvsEngine::open(temp_dir.path()).unwrap();
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/benches/my_benchmark.rs:77:9
[INFO] [stderr]    |
[INFO] [stderr] 77 |     let mut engine: SledKvsEngine = SledKvsEngine::open(temp_dir.path()).unwrap();
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 06s
[INFO] running `"docker" "inspect" "4885ec871fd4a273e52c7306423e88b0459166acf37d6aea447ca3d1e8c1cb09"`
[INFO] running `"docker" "rm" "-f" "4885ec871fd4a273e52c7306423e88b0459166acf37d6aea447ca3d1e8c1cb09"`
[INFO] [stdout] 4885ec871fd4a273e52c7306423e88b0459166acf37d6aea447ca3d1e8c1cb09