[INFO] updating cached repository https://github.com/tommyjk/kv-server
[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] bde59ae19fb5a4b34d026029fd502ce72e088ef6
[INFO] checking tommyjk/kv-server against try#7cb06892a23b4da510686618c8730f0b2e8bd952 for pr-66963
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftommyjk%2Fkv-server" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tommyjk/kv-server on toolchain 7cb06892a23b4da510686618c8730f0b2e8bd952
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7cb06892a23b4da510686618c8730f0b2e8bd952" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/tommyjk/kv-server
[INFO] finished tweaking git repo https://github.com/tommyjk/kv-server
[INFO] tweaked toml for git repo https://github.com/tommyjk/kv-server written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/tommyjk/kv-server already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7cb06892a23b4da510686618c8730f0b2e8bd952" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+7cb06892a23b4da510686618c8730f0b2e8bd952" "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] 02367d82cfbd7e0978a766c81f72b6d849ba0b1c7455165931839642067ec717
[INFO] running `"docker" "start" "-a" "02367d82cfbd7e0978a766c81f72b6d849ba0b1c7455165931839642067ec717"`
[INFO] [stderr]     Checking spin v0.5.0
[INFO] [stderr]    Compiling rayon-core v1.6.0
[INFO] [stderr]    Compiling slog v2.5.2
[INFO] [stderr]     Checking historian v4.0.3
[INFO] [stderr]    Compiling regex v1.1.9
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking cast v0.2.2
[INFO] [stderr]     Checking panic-control v0.1.4
[INFO] [stderr]    Compiling bincode v1.1.4
[INFO] [stderr]    Compiling rand_chacha v0.2.0
[INFO] [stderr]     Checking regex-syntax v0.6.8
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking memchr v2.2.1
[INFO] [stderr]     Checking atty v0.2.12
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]     Checking num-integer v0.1.41
[INFO] [stderr]     Checking float-cmp v0.4.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking getrandom v0.1.6
[INFO] [stderr]     Checking crossbeam-utils v0.6.6 (http://github.com/crossbeam-rs/crossbeam.git?rev=31fc7e6#31fc7e62)
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking rand_core v0.5.0
[INFO] [stderr]     Checking aho-corasick v0.7.4
[INFO] [stderr]     Checking csv-core v0.1.6
[INFO] [stderr]     Checking chrono v0.4.8
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2 (http://github.com/crossbeam-rs/crossbeam.git?rev=31fc7e6#31fc7e62)
[INFO] [stderr]     Checking rand_xoshiro v0.3.1
[INFO] [stderr]     Checking rand_os v0.2.2
[INFO] [stderr]     Checking slog-async v2.3.0
[INFO] [stderr]     Checking crossbeam-skiplist v0.0.0 (http://github.com/crossbeam-rs/crossbeam.git?rev=31fc7e6#31fc7e62)
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking criterion-plot v0.4.0
[INFO] [stderr]     Checking slog-term v2.4.1
[INFO] [stderr]     Checking rayon v1.2.0
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking ctrlc v3.1.3
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.97
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]     Checking serde v1.0.99
[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 pagecache v0.19.2
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking tinytemplate v1.0.2
[INFO] [stderr]     Checking escargot v0.4.0
[INFO] [stderr]     Checking criterion v0.3.0
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Checking sled v0.27.0
[INFO] [stderr]     Checking kvs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/kvs/kvs.rs:560:17
[INFO] [stderr]     |
[INFO] [stderr] 560 |             let mut file = old_set.get_mut(&fileid).expect("Database in an inconsistent state.");
[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/kvs/kvs.rs:560:17
[INFO] [stderr]     |
[INFO] [stderr] 560 |             let mut file = old_set.get_mut(&fileid).expect("Database in an inconsistent state.");
[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: field is never read: `threads`
[INFO] [stderr]   --> src/thread_pool/shared_queue.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     threads: Vec<JoinHandle<()>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/kvs/kvs.rs:517:9
[INFO] [stderr]     |
[INFO] [stderr] 517 |         bufwriter.write_all(&self.min_fileid.load(Ordering::Relaxed).to_le_bytes());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `threads`
[INFO] [stderr]   --> src/thread_pool/shared_queue.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     threads: Vec<JoinHandle<()>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/kvs/kvs.rs:517:9
[INFO] [stderr]     |
[INFO] [stderr] 517 |         bufwriter.write_all(&self.min_fileid.load(Ordering::Relaxed).to_le_bytes());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `sync::Arc`
[INFO] [stderr]   --> benches/kvserver.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     sync::Arc,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> benches/kvserver.rs:88:29
[INFO] [stderr]    |
[INFO] [stderr] 88 |                         let t = Instant::now();
[INFO] [stderr]    |                             ^ help: consider prefixing with an underscore: `_t`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `handle`
[INFO] [stderr]   --> benches/kvserver.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |         let handle = thread::spawn(move || server.run().expect("Server failed to start"));
[INFO] [stderr]    |             ^^^^^^ help: consider prefixing with an underscore: `_handle`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 37s
[INFO] running `"docker" "inspect" "02367d82cfbd7e0978a766c81f72b6d849ba0b1c7455165931839642067ec717"`
[INFO] running `"docker" "rm" "-f" "02367d82cfbd7e0978a766c81f72b6d849ba0b1c7455165931839642067ec717"`
[INFO] [stdout] 02367d82cfbd7e0978a766c81f72b6d849ba0b1c7455165931839642067ec717