[INFO] cloning repository https://github.com/MnO2/kvs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MnO2/kvs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMnO2%2Fkvs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMnO2%2Fkvs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e09c1999dd44b2172fc761dcee99f50b8f73ae40
[INFO] checking MnO2/kvs against beta-2020-07-24 for pr-75494-beta
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMnO2%2Fkvs" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MnO2/kvs on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MnO2/kvs
[INFO] finished tweaking git repo https://github.com/MnO2/kvs
[INFO] tweaked toml for git repo https://github.com/MnO2/kvs written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/MnO2/kvs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7078e0414b9d74e79da1a551a72b0776a05d5cf6c5b6785b5b110d9f603117be
[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" "7078e0414b9d74e79da1a551a72b0776a05d5cf6c5b6785b5b110d9f603117be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7078e0414b9d74e79da1a551a72b0776a05d5cf6c5b6785b5b110d9f603117be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7078e0414b9d74e79da1a551a72b0776a05d5cf6c5b6785b5b110d9f603117be", kill_on_drop: false }`
[INFO] [stdout] 7078e0414b9d74e79da1a551a72b0776a05d5cf6c5b6785b5b110d9f603117be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 4797cc17d8c42ff1a9262fc749b6ecdd79dafa62a5ee7287dbb07d7a47c75ded
[INFO] running `Command { std: "docker" "start" "-a" "4797cc17d8c42ff1a9262fc749b6ecdd79dafa62a5ee7287dbb07d7a47c75ded", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.36
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]    Compiling ryu v0.2.8
[INFO] [stderr]     Checking rustc-demangle v0.1.15
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]    Compiling regex v1.1.7
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking utf8-ranges v1.0.3
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking normalize-line-endings v0.2.2
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.30
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking walkdir v2.2.8
[INFO] [stderr]     Checking regex-syntax v0.6.7
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking memchr v2.2.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking aho-corasick v0.7.3
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking backtrace v0.3.32
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking float-cmp v0.4.0
[INFO] [stderr]     Checking rmp v0.8.7
[INFO] [stderr]     Checking tempfile v3.0.8
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking rmp-serde v0.13.7
[INFO] [stderr]     Checking kvs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking escargot v0.4.0
[INFO] [stdout] warning: unused import: `Serializer`
[INFO] [stdout]  --> src/reader.rs:3:31
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rmp_serde::{Deserializer, Serializer};
[INFO] [stdout]   |                               ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Serialize`
[INFO] [stdout]  --> src/reader.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   |                          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::BufRead`
[INFO] [stdout]  --> src/reader.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::BufRead;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Deserializer`
[INFO] [stdout]  --> src/writer.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rmp_serde::{Deserializer, Serializer};
[INFO] [stdout]   |                 ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Deserialize`
[INFO] [stdout]  --> src/writer.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   |             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BigEndian`, `WriteBytesExt`
[INFO] [stdout]  --> src/lib.rs:9:17
[INFO] [stdout]   |
[INFO] [stdout] 9 | use byteorder::{BigEndian, WriteBytesExt};
[INFO] [stdout]   |                 ^^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserializer`, `Serializer`
[INFO] [stdout]   --> src/lib.rs:10:17
[INFO] [stdout]    |
[INFO] [stdout] 10 | use rmp_serde::{Deserializer, Serializer};
[INFO] [stdout]    |                 ^^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stdout]   --> src/lib.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 | use serde::{Deserialize, Serialize};
[INFO] [stdout]    |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_offset`
[INFO] [stdout]    --> src/lib.rs:249:13
[INFO] [stdout]     |
[INFO] [stdout] 249 |         let file_offset = file_to_write.seek(io::SeekFrom::End(0))?;
[INFO] [stdout]     |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_offset`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `curr_offset` is assigned to, but never used
[INFO] [stdout]    --> src/lib.rs:303:17
[INFO] [stdout]     |
[INFO] [stdout] 303 |             let mut curr_offset = 0;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_curr_offset` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `curr_offset` is never read
[INFO] [stdout]    --> src/lib.rs:337:17
[INFO] [stdout]     |
[INFO] [stdout] 337 |                 curr_offset = next_offset;
[INFO] [stdout]     |                 ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `curr_idx` is never read
[INFO] [stdout]    --> src/lib.rs:342:9
[INFO] [stdout]     |
[INFO] [stdout] 342 |         curr_idx += 1;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:172:14
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let (mut file_id, mut file_to_write) = if self.should_write_to_new_file(self.file_names.last().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 `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:157:13
[INFO] [stdout]     |
[INFO] [stdout] 157 |             reader.read_record(io::SeekFrom::Start(keyinfo.record_pos), &mut record, &mut next_offset);
[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/lib.rs:204:9
[INFO] [stdout]     |
[INFO] [stdout] 204 |         writer.write_record(&new_record);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[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/lib.rs:259:9
[INFO] [stdout]     |
[INFO] [stdout] 259 |         writer.write_record(&new_record);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[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/lib.rs:297:13
[INFO] [stdout]     |
[INFO] [stdout] 297 |             rdr.seek(io::SeekFrom::Start(0));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[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/lib.rs:383:13
[INFO] [stdout]     |
[INFO] [stdout] 383 |             f.1.sync_data();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> src/bin/kvs.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::path::Path;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stdout] warning: unused import: `Serializer`
[INFO] [stdout]  --> src/reader.rs:3:31
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rmp_serde::{Deserializer, Serializer};
[INFO] [stdout]   |                               ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Serialize`
[INFO] [stdout]  --> src/reader.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   |                          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::BufRead`
[INFO] [stdout]  --> src/reader.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::BufRead;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Deserializer`
[INFO] [stdout]  --> src/writer.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rmp_serde::{Deserializer, Serializer};
[INFO] [stdout]   |                 ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Deserialize`
[INFO] [stdout]  --> src/writer.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   |             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BigEndian`, `WriteBytesExt`
[INFO] [stdout]  --> src/lib.rs:9:17
[INFO] [stdout]   |
[INFO] [stdout] 9 | use byteorder::{BigEndian, WriteBytesExt};
[INFO] [stdout]   |                 ^^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserializer`, `Serializer`
[INFO] [stdout]   --> src/lib.rs:10:17
[INFO] [stdout]    |
[INFO] [stdout] 10 | use rmp_serde::{Deserializer, Serializer};
[INFO] [stdout]    |                 ^^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stdout]   --> src/lib.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 | use serde::{Deserialize, Serialize};
[INFO] [stdout]    |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_offset`
[INFO] [stdout]    --> src/lib.rs:249:13
[INFO] [stdout]     |
[INFO] [stdout] 249 |         let file_offset = file_to_write.seek(io::SeekFrom::End(0))?;
[INFO] [stdout]     |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_offset`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `curr_offset` is assigned to, but never used
[INFO] [stdout]    --> src/lib.rs:303:17
[INFO] [stdout]     |
[INFO] [stdout] 303 |             let mut curr_offset = 0;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_curr_offset` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `curr_offset` is never read
[INFO] [stdout]    --> src/lib.rs:337:17
[INFO] [stdout]     |
[INFO] [stdout] 337 |                 curr_offset = next_offset;
[INFO] [stdout]     |                 ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `curr_idx` is never read
[INFO] [stdout]    --> src/lib.rs:342:9
[INFO] [stdout]     |
[INFO] [stdout] 342 |         curr_idx += 1;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:172:14
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let (mut file_id, mut file_to_write) = if self.should_write_to_new_file(self.file_names.last().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 `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:157:13
[INFO] [stdout]     |
[INFO] [stdout] 157 |             reader.read_record(io::SeekFrom::Start(keyinfo.record_pos), &mut record, &mut next_offset);
[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/lib.rs:204:9
[INFO] [stdout]     |
[INFO] [stdout] 204 |         writer.write_record(&new_record);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[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/lib.rs:259:9
[INFO] [stdout]     |
[INFO] [stdout] 259 |         writer.write_record(&new_record);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[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/lib.rs:297:13
[INFO] [stdout]     |
[INFO] [stdout] 297 |             rdr.seek(io::SeekFrom::Start(0));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[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/lib.rs:383:13
[INFO] [stdout]     |
[INFO] [stdout] 383 |             f.1.sync_data();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> src/bin/kvs.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::path::Path;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 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 1m 08s
[INFO] running `Command { std: "docker" "inspect" "4797cc17d8c42ff1a9262fc749b6ecdd79dafa62a5ee7287dbb07d7a47c75ded", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4797cc17d8c42ff1a9262fc749b6ecdd79dafa62a5ee7287dbb07d7a47c75ded", kill_on_drop: false }`
[INFO] [stdout] 4797cc17d8c42ff1a9262fc749b6ecdd79dafa62a5ee7287dbb07d7a47c75ded
