[INFO] cloning repository https://github.com/mxinden/kvs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mxinden/kvs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmxinden%2Fkvs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmxinden%2Fkvs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8d98845e342ae00baacb1d12711f4cde99101c39
[INFO] checking mxinden/kvs against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmxinden%2Fkvs" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mxinden/kvs 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 git repo https://github.com/mxinden/kvs
[INFO] finished tweaking git repo https://github.com/mxinden/kvs
[INFO] tweaked toml for git repo https://github.com/mxinden/kvs written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/mxinden/kvs 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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f978883263d48738d2da65a342d2b0cabc441eb61aa6ef7d20d11f702adc45e1
[INFO] running `Command { std: "docker" "start" "-a" "f978883263d48738d2da65a342d2b0cabc441eb61aa6ef7d20d11f702adc45e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f978883263d48738d2da65a342d2b0cabc441eb61aa6ef7d20d11f702adc45e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f978883263d48738d2da65a342d2b0cabc441eb61aa6ef7d20d11f702adc45e1", kill_on_drop: false }`
[INFO] [stdout] f978883263d48738d2da65a342d2b0cabc441eb61aa6ef7d20d11f702adc45e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 024012b95052f4979b864d46a50cb1e75bf594d87751e86f2fdba57b32064646
[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" "024012b95052f4979b864d46a50cb1e75bf594d87751e86f2fdba57b32064646", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling log v0.4.7
[INFO] [stderr]    Compiling regex v1.1.9
[INFO] [stderr]     Checking historian v4.0.3
[INFO] [stderr]     Checking panic-control v0.1.4
[INFO] [stderr]    Compiling rand_chacha v0.2.0
[INFO] [stderr]     Checking regex-syntax v0.6.8
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking regex-automata v0.1.7
[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 crossbeam-deque v0.6.3
[INFO] [stderr]     Checking bincode v1.1.4
[INFO] [stderr]     Checking hashbrown v0.3.1
[INFO] [stderr]     Checking serde_bytes v0.11.1
[INFO] [stderr]     Checking tinytemplate v1.0.2
[INFO] [stderr]     Checking rayon-core v1.5.0
[INFO] [stderr]     Checking escargot v0.4.0
[INFO] [stderr]     Checking rayon v1.1.0
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking aho-corasick v0.7.4
[INFO] [stderr]     Checking bstr v0.2.2
[INFO] [stderr]     Checking csv-core v0.1.6
[INFO] [stderr]     Checking backtrace v0.3.33
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking pagecache v0.17.0
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Checking sled v0.24.1
[INFO] [stderr]     Checking kvs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/thread_pool/shared.rs:17:16
[INFO] [stdout]    |
[INFO] [stdout] 17 | type Job = Box<FnOnce() + Send + 'static + std::panic::UnwindSafe>;
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnOnce() + Send + 'static + std::panic::UnwindSafe`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/server.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/server.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/thread_pool/shared.rs:17:16
[INFO] [stdout]    |
[INFO] [stdout] 17 | type Job = Box<FnOnce() + Send + 'static + std::panic::UnwindSafe>;
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnOnce() + Send + 'static + std::panic::UnwindSafe`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/server.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/server.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `threads`
[INFO] [stdout]   --> src/thread_pool/naive.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn new(threads: u32) -> Result<Self>
[INFO] [stdout]    |            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_threads`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/thread_pool/shared.rs:46:29
[INFO] [stdout]    |
[INFO] [stdout] 46 |                         Err(e) => {
[INFO] [stdout]    |                             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `threads`
[INFO] [stdout]   --> src/thread_pool/naive.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn new(threads: u32) -> Result<Self>
[INFO] [stdout]    |            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_threads`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/thread_pool/shared.rs:46:29
[INFO] [stdout]    |
[INFO] [stdout] 46 |                         Err(e) => {
[INFO] [stdout]    |                             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rx`
[INFO] [stdout]   --> src/thread_pool/shared.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     rx: Arc<Mutex<Receiver<Job>>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rx`
[INFO] [stdout]   --> src/thread_pool/shared.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     rx: Arc<Mutex<Receiver<Job>>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/thread_pool/shared.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         self.tx.send(Box::new(job));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/thread_pool/shared.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         self.tx.send(Box::new(job));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AtomicUsize`, `Ordering`
[INFO] [stdout]  --> tests/thread_pool.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::atomic::{AtomicUsize, Ordering};
[INFO] [stdout]   |                         ^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crossbeam_utils::sync::WaitGroup`
[INFO] [stdout]  --> tests/thread_pool.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crossbeam_utils::sync::WaitGroup;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/bin/kvs-server.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TcpListener`, `TcpStream`
[INFO] [stdout]  --> src/bin/kvs-server.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::net::{TcpListener, TcpStream};
[INFO] [stdout]   |                ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/bin/kvs-server.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]   --> src/bin/kvs-server.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::io::Read;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Req`, `Resp`, `SuccResp`
[INFO] [stdout]   --> src/bin/kvs-server.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 | use kvs::network::{Req, Resp, SuccResp};
[INFO] [stdout]    |                    ^^^  ^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `kvs::thread_pool::ThreadPool`
[INFO] [stdout]  --> src/bin/kvs-server.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use kvs::thread_pool::ThreadPool;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Result`
[INFO] [stdout]  --> benches/store.rs:4:31
[INFO] [stdout]   |
[INFO] [stdout] 4 | use kvs::{KvStore, KvsEngine, Result};
[INFO] [stdout]   |                               ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `criterion::black_box`
[INFO] [stdout]  --> benches/store.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use criterion::black_box;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/bin/kvs-server.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TcpListener`, `TcpStream`
[INFO] [stdout]  --> src/bin/kvs-server.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::net::{TcpListener, TcpStream};
[INFO] [stdout]   |                ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/bin/kvs-server.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]   --> src/bin/kvs-server.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::io::Read;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Req`, `Resp`, `SuccResp`
[INFO] [stdout]   --> src/bin/kvs-server.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 | use kvs::network::{Req, Resp, SuccResp};
[INFO] [stdout]    |                    ^^^  ^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `KvsEngine`
[INFO] [stdout]  --> tests/kv_store.rs:1:20
[INFO] [stdout]   |
[INFO] [stdout] 1 | use kvs::{KvStore, KvsEngine, Result};
[INFO] [stdout]   |                    ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `KvsEngine`
[INFO] [stdout]  --> benches/store.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 | use kvs::{KvStore, KvsEngine, Result};
[INFO] [stdout]   |                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `kvs::thread_pool::ThreadPool`
[INFO] [stdout]  --> src/bin/kvs-server.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use kvs::thread_pool::ThreadPool;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.65s
[INFO] running `Command { std: "docker" "inspect" "024012b95052f4979b864d46a50cb1e75bf594d87751e86f2fdba57b32064646", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "024012b95052f4979b864d46a50cb1e75bf594d87751e86f2fdba57b32064646", kill_on_drop: false }`
[INFO] [stdout] 024012b95052f4979b864d46a50cb1e75bf594d87751e86f2fdba57b32064646