[INFO] cloning repository https://github.com/ShaneM123/kvs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ShaneM123/kvs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShaneM123%2Fkvs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShaneM123%2Fkvs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 36186ab3041874c9ae4cf26c5f865605ed7d0ab9
[INFO] testing ShaneM123/kvs against 1.90.0 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShaneM123%2Fkvs" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ShaneM123/kvs
[INFO] finished tweaking git repo https://github.com/ShaneM123/kvs
[INFO] tweaked toml for git repo https://github.com/ShaneM123/kvs written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ShaneM123/kvs on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ShaneM123/kvs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded once_cell v1.5.2
[INFO] [stderr]   Downloaded slog-term v2.8.0
[INFO] [stderr]   Downloaded slog-async v2.6.0
[INFO] [stderr]   Downloaded slog v2.7.0
[INFO] [stderr]   Downloaded predicates-tree v1.0.1
[INFO] [stderr]   Downloaded anyhow v1.0.40
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.4
[INFO] [stderr]   Downloaded assert_cmd v1.0.2
[INFO] [stderr]   Downloaded predicates v1.0.6
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.4
[INFO] [stderr]   Downloaded libc v0.2.82
[INFO] [stderr]   Downloaded predicates-core v1.0.1
[INFO] [stderr]   Downloaded memoffset v0.6.3
[INFO] [stderr]   Downloaded regex-syntax v0.6.22
[INFO] [stderr]   Downloaded yaml-rust v0.3.5
[INFO] [stderr]   Downloaded thread_local v1.1.1
[INFO] [stderr]   Downloaded getrandom v0.2.2
[INFO] [stderr]   Downloaded regex v1.4.3
[INFO] [stderr]   Downloaded rustversion v1.0.5
[INFO] [stderr]   Downloaded sled v0.34.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8960b84bb3527ef999a5fb9fb38cdbb3577198420f89baa073ebb04b30bd9203
[INFO] running `Command { std: "docker" "start" "-a" "8960b84bb3527ef999a5fb9fb38cdbb3577198420f89baa073ebb04b30bd9203", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8960b84bb3527ef999a5fb9fb38cdbb3577198420f89baa073ebb04b30bd9203", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8960b84bb3527ef999a5fb9fb38cdbb3577198420f89baa073ebb04b30bd9203", kill_on_drop: false }`
[INFO] [stdout] 8960b84bb3527ef999a5fb9fb38cdbb3577198420f89baa073ebb04b30bd9203
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 50d22c427301e222f25ee94ae748c6e8510d949b42adf2908c37c26546f93e8c
[INFO] running `Command { std: "docker" "start" "-a" "50d22c427301e222f25ee94ae748c6e8510d949b42adf2908c37c26546f93e8c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.4
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling once_cell v1.5.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]    Compiling yaml-rust v0.3.5
[INFO] [stderr]    Compiling thread_local v1.1.1
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.4
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling slog-async v2.6.0
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling term v0.7.0
[INFO] [stderr]    Compiling sled v0.34.6
[INFO] [stderr]    Compiling slog-term v2.8.0
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling structopt v0.3.21
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling kvs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `File`
[INFO] [stdout]  --> src/lib.rs:7:28
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::fs::{OpenOptions, File};
[INFO] [stdout]   |                            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `join_paths` and `set_current_dir`
[INFO] [stdout]   --> src/lib.rs:12:16
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::env::{set_current_dir, join_paths};
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `prelude::*`
[INFO] [stdout]   --> src/lib.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::io::{prelude::*, Seek, SeekFrom};
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:239:13
[INFO] [stdout]     |
[INFO] [stdout] 239 |         let mut deserialised: Vec<KvsCommand> = serde_json::from_reader(reader).unwrap();
[INFO] [stdout]     |             ----^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `db_file`
[INFO] [stdout]    --> src/lib.rs:269:13
[INFO] [stdout]     |
[INFO] [stdout] 269 |         let db_file = fs::File::create(the_path.clone()).unwrap();
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_db_file`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]   --> src/lib.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct SledKvsEngine{
[INFO] [stdout]    |            ------------- field in this struct
[INFO] [stdout] 43 |     pub sled_db: sled::Db,
[INFO] [stdout] 44 |     path: String,
[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/lib.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |         file.read_to_string(&mut buffy);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 138 |         let _ = file.read_to_string(&mut buffy);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:192:9
[INFO] [stdout]     |
[INFO] [stdout] 192 |         file.read_to_string(&mut buffy);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 192 |         let _ = file.read_to_string(&mut buffy);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:267:9
[INFO] [stdout]     |
[INFO] [stdout] 267 |         fs::create_dir_all(&path);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 267 |         let _ = fs::create_dir_all(&path);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AppSettings`, `ArgMatches`, `Arg`, and `SubCommand`
[INFO] [stdout]  --> src/bin/kvs.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use clap::{load_yaml, App, AppSettings, Arg, SubCommand, ArgMatches};
[INFO] [stdout]   |                            ^^^^^^^^^^^  ^^^  ^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/bin/kvs.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::panicking`
[INFO] [stdout]  --> src/bin/kvs.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::thread::panicking;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow::Error`
[INFO] [stdout]  --> src/bin/kvs.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use anyhow::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/bin/kvs.rs:27:17
[INFO] [stdout]    |
[INFO] [stdout] 27 |             let key = matches.value_of("KEY").expect("KEY argument missing");
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/bin/kvs.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |             let value = matches.value_of("VALUE").expect("VALUE argument missing");
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/bin/kvs.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |            let res =  match kv_store.remove(key.parse().unwrap())
[INFO] [stdout]    |                ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ArgMatches`
[INFO] [stdout]  --> src/bin/kvs-client.rs:2:34
[INFO] [stdout]   |
[INFO] [stdout] 2 | use clap::{App, Arg, SubCommand, ArgMatches};
[INFO] [stdout]   |                                  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Args` and `args`
[INFO] [stdout]  --> src/bin/kvs-client.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::env::{args, Args};
[INFO] [stdout]   |                ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error as IOError`, `ErrorKind`, and `Read`
[INFO] [stdout]  --> src/bin/kvs-client.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{Error as IOError, Write, ErrorKind, Read, BufReader, BufRead};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^         ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::Serialize`
[INFO] [stdout]  --> src/bin/kvs-client.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serde::Serialize;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `GetStream`
[INFO] [stdout]  --> src/bin/kvs-client.rs:7:41
[INFO] [stdout]   |
[INFO] [stdout] 7 | use kvs::shared::messaging::{SetStream, GetStream};
[INFO] [stdout]   |                                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `chrono::Duration`
[INFO] [stdout]  --> src/bin/kvs-client.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use chrono::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/bin/kvs-server.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::{Read, BufReader, BufRead, Error, Write};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/bin/kvs-server.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]   --> src/bin/kvs-server.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::borrow::Borrow;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]   --> src/bin/kvs-server.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::ops::Deref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `address`
[INFO] [stdout]   --> src/bin/kvs-client.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let address = match matches.subcommand_matches("set"){
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_address`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/bin/kvs-client.rs:78:14
[INFO] [stdout]    |
[INFO] [stdout] 78 |         Some(val) => {
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/bin/kvs-client.rs:81:17
[INFO] [stdout]    |
[INFO] [stdout] 81 |             let key = sub_cmd.value_of("KEY").unwrap();
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/bin/kvs-client.rs:87:21
[INFO] [stdout]    |
[INFO] [stdout] 87 |                 Err(e) => {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/bin/kvs-client.rs:119:21
[INFO] [stdout]     |
[INFO] [stdout] 119 |                 Err(e) => {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/bin/kvs-client.rs:153:21
[INFO] [stdout]     |
[INFO] [stdout] 153 |                 Err(e) => {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `temp_dir`
[INFO] [stdout]   --> src/bin/kvs-server.rs:65:21
[INFO] [stdout]    |
[INFO] [stdout] 65 |                 let temp_dir = std::path::Path::new("tmp/foo2.txt").file_name().unwrap();
[INFO] [stdout]    |                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_temp_dir`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `store`
[INFO] [stdout]   --> src/bin/kvs-server.rs:66:25
[INFO] [stdout]    |
[INFO] [stdout] 66 |                 let mut store = match engine_func(engine).unwrap() {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_store`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/kvs-server.rs:74:29
[INFO] [stdout]    |
[INFO] [stdout] 74 |                         let x =  reader.consume(received.len());
[INFO] [stdout]    |                             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/kvs-server.rs:77:33
[INFO] [stdout]    |
[INFO] [stdout] 77 | ...                   let x = store.set(deserialized.key.into(), deserialized.value.into()).unwrap();
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/kvs-server.rs:96:33
[INFO] [stdout]    |
[INFO] [stdout] 96 | ...                   let x = match store.remove(deserialized.key.into())
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `store`
[INFO] [stdout]    --> src/bin/kvs-server.rs:114:41
[INFO] [stdout]     |
[INFO] [stdout] 114 |                     EngineType::SledEng(store) => {unimplemented!()}
[INFO] [stdout]     |                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_store`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/bin/kvs-server.rs:118:17
[INFO] [stdout]     |
[INFO] [stdout] 118 |             Err(e) => {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/kvs-server.rs:66:21
[INFO] [stdout]    |
[INFO] [stdout] 66 |                 let mut store = match engine_func(engine).unwrap() {
[INFO] [stdout]    |                     ----^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.43s
[INFO] running `Command { std: "docker" "inspect" "50d22c427301e222f25ee94ae748c6e8510d949b42adf2908c37c26546f93e8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50d22c427301e222f25ee94ae748c6e8510d949b42adf2908c37c26546f93e8c", kill_on_drop: false }`
[INFO] [stdout] 50d22c427301e222f25ee94ae748c6e8510d949b42adf2908c37c26546f93e8c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5976239992b6de14c7b064972403a5b2e1885cedb1c09624d8a13e223b7eb835
[INFO] running `Command { std: "docker" "start" "-a" "5976239992b6de14c7b064972403a5b2e1885cedb1c09624d8a13e223b7eb835", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling regex-syntax v0.6.22
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stdout] warning: unused import: `File`
[INFO] [stdout]  --> src/lib.rs:7:28
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::fs::{OpenOptions, File};
[INFO] [stdout]   |                            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `join_paths` and `set_current_dir`
[INFO] [stdout]   --> src/lib.rs:12:16
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::env::{set_current_dir, join_paths};
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `prelude::*`
[INFO] [stdout]   --> src/lib.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::io::{prelude::*, Seek, SeekFrom};
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:239:13
[INFO] [stdout]     |
[INFO] [stdout] 239 |         let mut deserialised: Vec<KvsCommand> = serde_json::from_reader(reader).unwrap();
[INFO] [stdout]     |             ----^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `db_file`
[INFO] [stdout]    --> src/lib.rs:269:13
[INFO] [stdout]     |
[INFO] [stdout] 269 |         let db_file = fs::File::create(the_path.clone()).unwrap();
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_db_file`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]   --> src/lib.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct SledKvsEngine{
[INFO] [stdout]    |            ------------- field in this struct
[INFO] [stdout] 43 |     pub sled_db: sled::Db,
[INFO] [stdout] 44 |     path: String,
[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/lib.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |         file.read_to_string(&mut buffy);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 138 |         let _ = file.read_to_string(&mut buffy);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:192:9
[INFO] [stdout]     |
[INFO] [stdout] 192 |         file.read_to_string(&mut buffy);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 192 |         let _ = file.read_to_string(&mut buffy);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:267:9
[INFO] [stdout]     |
[INFO] [stdout] 267 |         fs::create_dir_all(&path);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 267 |         let _ = fs::create_dir_all(&path);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling predicates-core v1.0.1
[INFO] [stderr]    Compiling plotters-backend v0.3.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling float-cmp v0.8.0
[INFO] [stderr]    Compiling treeline v0.1.0
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling half v1.7.1
[INFO] [stderr]    Compiling walkdir v2.3.1
[INFO] [stderr]    Compiling predicates-tree v1.0.1
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling serde_cbor v0.11.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling plotters-svg v0.3.0
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling bstr v0.2.15
[INFO] [stderr]    Compiling plotters v0.3.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stdout] warning: unused import: `ArgMatches`
[INFO] [stdout]  --> src/bin/kvs-client.rs:2:34
[INFO] [stdout]   |
[INFO] [stdout] 2 | use clap::{App, Arg, SubCommand, ArgMatches};
[INFO] [stdout]   |                                  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Args` and `args`
[INFO] [stdout]  --> src/bin/kvs-client.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::env::{args, Args};
[INFO] [stdout]   |                ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error as IOError`, `ErrorKind`, and `Read`
[INFO] [stdout]  --> src/bin/kvs-client.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{Error as IOError, Write, ErrorKind, Read, BufReader, BufRead};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^         ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::Serialize`
[INFO] [stdout]  --> src/bin/kvs-client.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serde::Serialize;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `GetStream`
[INFO] [stdout]  --> src/bin/kvs-client.rs:7:41
[INFO] [stdout]   |
[INFO] [stdout] 7 | use kvs::shared::messaging::{SetStream, GetStream};
[INFO] [stdout]   |                                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `chrono::Duration`
[INFO] [stdout]  --> src/bin/kvs-client.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use chrono::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `address`
[INFO] [stdout]   --> src/bin/kvs-client.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let address = match matches.subcommand_matches("set"){
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_address`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/bin/kvs-client.rs:78:14
[INFO] [stdout]    |
[INFO] [stdout] 78 |         Some(val) => {
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/bin/kvs-client.rs:81:17
[INFO] [stdout]    |
[INFO] [stdout] 81 |             let key = sub_cmd.value_of("KEY").unwrap();
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/bin/kvs-client.rs:87:21
[INFO] [stdout]    |
[INFO] [stdout] 87 |                 Err(e) => {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/bin/kvs-client.rs:119:21
[INFO] [stdout]     |
[INFO] [stdout] 119 |                 Err(e) => {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/bin/kvs-client.rs:153:21
[INFO] [stdout]     |
[INFO] [stdout] 153 |                 Err(e) => {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AppSettings`, `ArgMatches`, `Arg`, and `SubCommand`
[INFO] [stdout]  --> src/bin/kvs.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use clap::{load_yaml, App, AppSettings, Arg, SubCommand, ArgMatches};
[INFO] [stdout]   |                            ^^^^^^^^^^^  ^^^  ^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/bin/kvs.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::panicking`
[INFO] [stdout]  --> src/bin/kvs.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::thread::panicking;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow::Error`
[INFO] [stdout]  --> src/bin/kvs.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use anyhow::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/bin/kvs.rs:27:17
[INFO] [stdout]    |
[INFO] [stdout] 27 |             let key = matches.value_of("KEY").expect("KEY argument missing");
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/bin/kvs.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |             let value = matches.value_of("VALUE").expect("VALUE argument missing");
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/bin/kvs.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |            let res =  match kv_store.remove(key.parse().unwrap())
[INFO] [stdout]    |                ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/bin/kvs-server.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::{Read, BufReader, BufRead, Error, Write};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/bin/kvs-server.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]   --> src/bin/kvs-server.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::borrow::Borrow;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]   --> src/bin/kvs-server.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::ops::Deref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `temp_dir`
[INFO] [stdout]   --> src/bin/kvs-server.rs:65:21
[INFO] [stdout]    |
[INFO] [stdout] 65 |                 let temp_dir = std::path::Path::new("tmp/foo2.txt").file_name().unwrap();
[INFO] [stdout]    |                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_temp_dir`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `store`
[INFO] [stdout]   --> src/bin/kvs-server.rs:66:25
[INFO] [stdout]    |
[INFO] [stdout] 66 |                 let mut store = match engine_func(engine).unwrap() {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_store`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/kvs-server.rs:74:29
[INFO] [stdout]    |
[INFO] [stdout] 74 |                         let x =  reader.consume(received.len());
[INFO] [stdout]    |                             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/kvs-server.rs:77:33
[INFO] [stdout]    |
[INFO] [stdout] 77 | ...                   let x = store.set(deserialized.key.into(), deserialized.value.into()).unwrap();
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/kvs-server.rs:96:33
[INFO] [stdout]    |
[INFO] [stdout] 96 | ...                   let x = match store.remove(deserialized.key.into())
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `store`
[INFO] [stdout]    --> src/bin/kvs-server.rs:114:41
[INFO] [stdout]     |
[INFO] [stdout] 114 |                     EngineType::SledEng(store) => {unimplemented!()}
[INFO] [stdout]     |                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_store`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/bin/kvs-server.rs:118:17
[INFO] [stdout]     |
[INFO] [stdout] 118 |             Err(e) => {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/kvs-server.rs:66:21
[INFO] [stdout]    |
[INFO] [stdout] 66 |                 let mut store = match engine_func(engine).unwrap() {
[INFO] [stdout]    |                     ----^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]    Compiling regex v1.4.3
[INFO] [stderr]    Compiling cast v0.2.6
[INFO] [stderr]    Compiling criterion-plot v0.4.3
[INFO] [stderr]    Compiling predicates v1.0.6
[INFO] [stderr]    Compiling assert_cmd v1.0.2
[INFO] [stderr]    Compiling criterion v0.3.4
[INFO] [stderr]    Compiling kvs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ArgMatches`
[INFO] [stdout]  --> src/bin/kvs-client.rs:2:34
[INFO] [stdout]   |
[INFO] [stdout] 2 | use clap::{App, Arg, SubCommand, ArgMatches};
[INFO] [stdout]   |                                  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Args` and `args`
[INFO] [stdout]  --> src/bin/kvs-client.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::env::{args, Args};
[INFO] [stdout]   |                ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error as IOError`, `ErrorKind`, and `Read`
[INFO] [stdout]  --> src/bin/kvs-client.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{Error as IOError, Write, ErrorKind, Read, BufReader, BufRead};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^         ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::Serialize`
[INFO] [stdout]  --> src/bin/kvs-client.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serde::Serialize;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `GetStream`
[INFO] [stdout]  --> src/bin/kvs-client.rs:7:41
[INFO] [stdout]   |
[INFO] [stdout] 7 | use kvs::shared::messaging::{SetStream, GetStream};
[INFO] [stdout]   |                                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `chrono::Duration`
[INFO] [stdout]  --> src/bin/kvs-client.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use chrono::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `address`
[INFO] [stdout]   --> src/bin/kvs-client.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let address = match matches.subcommand_matches("set"){
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_address`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/bin/kvs-client.rs:78:14
[INFO] [stdout]    |
[INFO] [stdout] 78 |         Some(val) => {
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/bin/kvs-client.rs:81:17
[INFO] [stdout]    |
[INFO] [stdout] 81 |             let key = sub_cmd.value_of("KEY").unwrap();
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/bin/kvs-client.rs:87:21
[INFO] [stdout]    |
[INFO] [stdout] 87 |                 Err(e) => {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/bin/kvs-client.rs:119:21
[INFO] [stdout]     |
[INFO] [stdout] 119 |                 Err(e) => {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/bin/kvs-client.rs:153:21
[INFO] [stdout]     |
[INFO] [stdout] 153 |                 Err(e) => {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/kv_store.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut store = KvStore::open(temp_dir.path())?;
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/kv_store.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let mut store = KvStore::open(temp_dir.path())?;
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> tests/kv_store.rs:117:13
[INFO] [stdout]     |
[INFO] [stdout] 117 |         let mut store = KvStore::open(temp_dir.path())?;
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 22.47s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.4
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "5976239992b6de14c7b064972403a5b2e1885cedb1c09624d8a13e223b7eb835", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5976239992b6de14c7b064972403a5b2e1885cedb1c09624d8a13e223b7eb835", kill_on_drop: false }`
[INFO] [stdout] 5976239992b6de14c7b064972403a5b2e1885cedb1c09624d8a13e223b7eb835
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d74963240c5411b65bd5776b8224c92e7ad45044e41100ae5a77127f1294fdf9
[INFO] running `Command { std: "docker" "start" "-a" "d74963240c5411b65bd5776b8224c92e7ad45044e41100ae5a77127f1294fdf9", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `File`
[INFO] [stderr]  --> src/lib.rs:7:28
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::fs::{OpenOptions, File};
[INFO] [stderr]   |                            ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `join_paths` and `set_current_dir`
[INFO] [stderr]   --> src/lib.rs:12:16
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::env::{set_current_dir, join_paths};
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `prelude::*`
[INFO] [stderr]   --> src/lib.rs:13:15
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::io::{prelude::*, Seek, SeekFrom};
[INFO] [stderr]    |               ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:239:13
[INFO] [stderr]     |
[INFO] [stderr] 239 |         let mut deserialised: Vec<KvsCommand> = serde_json::from_reader(reader).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: unused variable: `db_file`
[INFO] [stderr]    --> src/lib.rs:269:13
[INFO] [stderr]     |
[INFO] [stderr] 269 |         let db_file = fs::File::create(the_path.clone()).unwrap();
[INFO] [stderr]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_db_file`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `path` is never read
[INFO] [stderr]   --> src/lib.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 42 | pub struct SledKvsEngine{
[INFO] [stderr]    |            ------------- field in this struct
[INFO] [stderr] 43 |     pub sled_db: sled::Db,
[INFO] [stderr] 44 |     path: String,
[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/lib.rs:138:9
[INFO] [stderr]     |
[INFO] [stderr] 138 |         file.read_to_string(&mut buffy);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 138 |         let _ = file.read_to_string(&mut buffy);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:192:9
[INFO] [stderr]     |
[INFO] [stderr] 192 |         file.read_to_string(&mut buffy);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 192 |         let _ = file.read_to_string(&mut buffy);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:267:9
[INFO] [stderr]     |
[INFO] [stderr] 267 |         fs::create_dir_all(&path);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 267 |         let _ = fs::create_dir_all(&path);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `kvs` (lib) generated 9 warnings (run `cargo fix --lib -p kvs` to apply 4 suggestions)
[INFO] [stderr] warning: unused import: `ArgMatches`
[INFO] [stderr]  --> src/bin/kvs-client.rs:2:34
[INFO] [stderr]   |
[INFO] [stderr] 2 | use clap::{App, Arg, SubCommand, ArgMatches};
[INFO] [stderr]   |                                  ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Args` and `args`
[INFO] [stderr]  --> src/bin/kvs-client.rs:3:16
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::env::{args, Args};
[INFO] [stderr]   |                ^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Error as IOError`, `ErrorKind`, and `Read`
[INFO] [stderr]  --> src/bin/kvs-client.rs:5:15
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{Error as IOError, Write, ErrorKind, Read, BufReader, BufRead};
[INFO] [stderr]   |               ^^^^^^^^^^^^^^^^         ^^^^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `serde::Serialize`
[INFO] [stderr]  --> src/bin/kvs-client.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use serde::Serialize;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `GetStream`
[INFO] [stderr]  --> src/bin/kvs-client.rs:7:41
[INFO] [stderr]   |
[INFO] [stderr] 7 | use kvs::shared::messaging::{SetStream, GetStream};
[INFO] [stderr]   |                                         ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `chrono::Duration`
[INFO] [stderr]  --> src/bin/kvs-client.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use chrono::Duration;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `address`
[INFO] [stderr]   --> src/bin/kvs-client.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |     let address = match matches.subcommand_matches("set"){
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_address`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `val`
[INFO] [stderr]   --> src/bin/kvs-client.rs:78:14
[INFO] [stderr]    |
[INFO] [stderr] 78 |         Some(val) => {
[INFO] [stderr]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/bin/kvs-client.rs:81:17
[INFO] [stderr]    |
[INFO] [stderr] 81 |             let key = sub_cmd.value_of("KEY").unwrap();
[INFO] [stderr]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/bin/kvs-client.rs:87:21
[INFO] [stderr]    |
[INFO] [stderr] 87 |                 Err(e) => {
[INFO] [stderr]    |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/bin/kvs-client.rs:119:21
[INFO] [stderr]     |
[INFO] [stderr] 119 |                 Err(e) => {
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/bin/kvs-client.rs:153:21
[INFO] [stderr]     |
[INFO] [stderr] 153 |                 Err(e) => {
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `AppSettings`, `ArgMatches`, `Arg`, and `SubCommand`
[INFO] [stderr]  --> src/bin/kvs.rs:1:28
[INFO] [stderr]   |
[INFO] [stderr] 1 | use clap::{load_yaml, App, AppSettings, Arg, SubCommand, ArgMatches};
[INFO] [stderr]   |                            ^^^^^^^^^^^  ^^^  ^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::path::PathBuf`
[INFO] [stderr]  --> src/bin/kvs.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::path::PathBuf;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread::panicking`
[INFO] [stderr]  --> src/bin/kvs.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::thread::panicking;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `anyhow::Error`
[INFO] [stderr]  --> src/bin/kvs.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use anyhow::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/bin/kvs.rs:27:17
[INFO] [stderr]    |
[INFO] [stderr] 27 |             let key = matches.value_of("KEY").expect("KEY argument missing");
[INFO] [stderr]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/bin/kvs.rs:28:17
[INFO] [stderr]    |
[INFO] [stderr] 28 |             let value = matches.value_of("VALUE").expect("VALUE argument missing");
[INFO] [stderr]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> src/bin/kvs.rs:32:16
[INFO] [stderr]    |
[INFO] [stderr] 32 |            let res =  match kv_store.remove(key.parse().unwrap())
[INFO] [stderr]    |                ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Read`
[INFO] [stderr]  --> src/bin/kvs-server.rs:6:15
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::io::{Read, BufReader, BufRead, Error, Write};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/bin/kvs-server.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::borrow::Borrow`
[INFO] [stderr]   --> src/bin/kvs-server.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::borrow::Borrow;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]   --> src/bin/kvs-server.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::ops::Deref;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `temp_dir`
[INFO] [stderr]   --> src/bin/kvs-server.rs:65:21
[INFO] [stderr]    |
[INFO] [stderr] 65 |                 let temp_dir = std::path::Path::new("tmp/foo2.txt").file_name().unwrap();
[INFO] [stderr]    |                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_temp_dir`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `store`
[INFO] [stderr]   --> src/bin/kvs-server.rs:66:25
[INFO] [stderr]    |
[INFO] [stderr] 66 |                 let mut store = match engine_func(engine).unwrap() {
[INFO] [stderr]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_store`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/bin/kvs-server.rs:74:29
[INFO] [stderr]    |
[INFO] [stderr] 74 |                         let x =  reader.consume(received.len());
[INFO] [stderr]    |                             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/bin/kvs-server.rs:77:33
[INFO] [stderr]    |
[INFO] [stderr] 77 | ...                   let x = store.set(deserialized.key.into(), deserialized.value.into()).unwrap();
[INFO] [stderr]    |                           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/bin/kvs-server.rs:96:33
[INFO] [stderr]    |
[INFO] [stderr] 96 | ...                   let x = match store.remove(deserialized.key.into())
[INFO] [stderr]    |                           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `store`
[INFO] [stderr]    --> src/bin/kvs-server.rs:114:41
[INFO] [stderr]     |
[INFO] [stderr] 114 |                     EngineType::SledEng(store) => {unimplemented!()}
[INFO] [stderr]     |                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_store`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/bin/kvs-server.rs:118:17
[INFO] [stderr]     |
[INFO] [stderr] 118 |             Err(e) => {
[INFO] [stderr]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/kvs-server.rs:66:21
[INFO] [stderr]    |
[INFO] [stderr] 66 |                 let mut store = match engine_func(engine).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: `kvs` (bin "kvs-client") generated 12 warnings (run `cargo fix --bin "kvs-client"` to apply 6 suggestions)
[INFO] [stderr] warning: `kvs` (bin "kvs") generated 7 warnings (run `cargo fix --bin "kvs"` to apply 4 suggestions)
[INFO] [stderr] warning: `kvs` (bin "kvs-server") generated 12 warnings (run `cargo fix --bin "kvs-server"` to apply 5 suggestions)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/kv_store.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let mut store = KvStore::open(temp_dir.path())?;
[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]   --> tests/kv_store.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 |     let mut store = KvStore::open(temp_dir.path())?;
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/kv_store.rs:117:13
[INFO] [stderr]     |
[INFO] [stderr] 117 |         let mut store = KvStore::open(temp_dir.path())?;
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: `kvs` (bin "kvs-client" test) generated 12 warnings (12 duplicates)
[INFO] [stderr] warning: `kvs` (test "kv_store") generated 3 warnings (run `cargo fix --test "kv_store"` to apply 3 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.4
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] [stderr]      Running unittests src/bin/kvs-client.rs (/opt/rustwide/target/debug/deps/kvs_client-bfbd8bebf9acc0e7)
[INFO] [stderr]      Running tests/cli.rs (/opt/rustwide/target/debug/deps/cli-83923504fdc4e044)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stderr] version: 0.1.0
[INFO] [stderr]  version: 0.1.0
[INFO] [stderr]  Sep 24 23:29:17.239 INFO Application started, started_at: 2025-09-24 23:29:17.235932587 UTC
[INFO] [stderr]  Sep 24 23:29:17.241 INFO App Ended, address: 127.0.0.1:4002, Engine: sled, version: 0.1.0
[INFO] [stderr] Sep 24 23:29:17.236 INFO Application started, started_at: 2025-09-24 23:29:17.234275658 UTC
[INFO] [stdout] test client_cli_version ... ok
[INFO] [stderr]  Sep 24 23:29:17.242 INFO App Ended, address: 127.0.0.1:4004, Engine: kvs, version: 0.1.0
[INFO] [stderr] version: 0.1.0
[INFO] [stderr]  Sep 24 23:29:17.249 INFO Application started, started_at: 2025-09-24 23:29:17.235480577 UTC
[INFO] [stderr]  Sep 24 23:29:17.249 INFO App Ended, address: 127.0.0.1:4005, Engine: sled, version: 0.1.0
[INFO] [stdout] test server_cli_version ... ok
[INFO] [stdout] test client_cli_invalid_subcommand ... ok
[INFO] [stdout] test client_cli_no_args ... ok
[INFO] [stdout] test client_cli_invalid_set ... ok
[INFO] [stdout] test client_cli_invalid_get ... ok
[INFO] [stdout] test client_cli_invalid_rm ... ok
[INFO] [stdout] test cli_log_configuration ... ok
[INFO] [stderr] version: 0.1.0
[INFO] [stderr]  Sep 24 23:29:18.296 INFO Application started, started_at: 2025-09-24 23:29:18.294765857 UTC
[INFO] [stderr]  Sep 24 23:29:18.296 INFO App Ended, address: 127.0.0.1:4004, Engine: kvs, version: 0.1.0
[INFO] [stderr] 
[INFO] [stderr] thread 'main' panicked at src/bin/kvs-server.rs:114:52:
[INFO] [stderr] not implemented
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x61ac5e7bd122 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]    1:     0x61ac5e7bd122 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]    2:     0x61ac5e7bd122 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]    3:     0x61ac5e7bd122 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stderr]    4:     0x61ac5e7e29f3 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stderr]    5:     0x61ac5e7e29f3 - core::fmt::write::h8a494366950f23bb
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stderr]    6:     0x61ac5e7b9423 - std::io::default_write_fmt::ha27fbccbc65eb6fa
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stderr]    7:     0x61ac5e7b9423 - std::io::Write::write_fmt::h6556609fca33d0b1
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stderr]    8:     0x61ac5e7bcf72 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]    9:     0x61ac5e7be5c3 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stderr]   10:     0x61ac5e7be3a5 - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:327:9
[INFO] [stderr]   11:     0x61ac5e7befd5 - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:833:13
[INFO] [stderr]   12:     0x61ac5e7bed36 - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:699:13
[INFO] [stderr]   13:     0x61ac5e7bd629 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stderr]   14:     0x61ac5e7be9fd - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stderr]   15:     0x61ac5e7e0410 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stderr]   16:     0x61ac5e7e049c - core::panicking::panic::h89a5f2df32b0508a
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:145:5
[INFO] [stderr]   17:     0x61ac5e4869f8 - kvs_server::main::h13a7035e55a19a87
[INFO] [stderr]                                at /opt/rustwide/workdir/src/bin/kvs-server.rs:114:52
[INFO] [stderr]   18:     0x61ac5e47e10b - core::ops::function::FnOnce::call_once::h567af657f8eab038
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stderr]   19:     0x61ac5e46f75e - std::sys::backtrace::__rust_begin_short_backtrace::h3ecd1755fb56025f
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stderr]   20:     0x61ac5e477461 - std::rt::lang_start::{{closure}}::hd67db422ee6fb5ba
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:206:18
[INFO] [stderr]   21:     0x61ac5e7b2270 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h638295a043b40957
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:290:21
[INFO] [stderr]   22:     0x61ac5e7b2270 - std::panicking::catch_unwind::do_call::hbd68098bdea1ca50
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stderr]   23:     0x61ac5e7b2270 - std::panicking::catch_unwind::h50591d85bf847c7c
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stderr]   24:     0x61ac5e7b2270 - std::panic::catch_unwind::h2487b4c4f2ae22c6
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stderr]   25:     0x61ac5e7b2270 - std::rt::lang_start_internal::{{closure}}::h61f0945cc6c9a811
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:175:24
[INFO] [stderr]   26:     0x61ac5e7b2270 - std::panicking::catch_unwind::do_call::h34b9c3722acd6bd1
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stderr]   27:     0x61ac5e7b2270 - std::panicking::catch_unwind::hf9a822ea043fb0d6
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stderr]   28:     0x61ac5e7b2270 - std::panic::catch_unwind::h5b3cac802237ed89
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stderr]   29:     0x61ac5e7b2270 - std::rt::lang_start_internal::h34f9328d113fd60a
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:171:5
[INFO] [stderr]   30:     0x61ac5e477447 - std::rt::lang_start::h11099a2938edbb6f
[INFO] [stderr]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:205:5
[INFO] [stderr]   31:     0x61ac5e48798e - main
[INFO] [stderr]   32:     0x792f70cc01ca - <unknown>
[INFO] [stderr]   33:     0x792f70cc028b - __libc_start_main
[INFO] [stderr]   34:     0x61ac5e46a765 - _start
[INFO] [stderr]   35:                0x0 - <unknown>
[INFO] [stdout] test cli_access_server_sled_engine ... FAILED
[INFO] [stdout] test cli_access_server_kvs_engine ... ok
[INFO] [stdout] test cli_wrong_engine has been running for over 60 seconds
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "d74963240c5411b65bd5776b8224c92e7ad45044e41100ae5a77127f1294fdf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d74963240c5411b65bd5776b8224c92e7ad45044e41100ae5a77127f1294fdf9", kill_on_drop: false }`
[INFO] [stdout] d74963240c5411b65bd5776b8224c92e7ad45044e41100ae5a77127f1294fdf9
