[INFO] cloning repository https://github.com/OLUWAMUYIWA/kvs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/OLUWAMUYIWA/kvs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOLUWAMUYIWA%2Fkvs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOLUWAMUYIWA%2Fkvs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 525262c2a475c433aaa856ca2f41175a0d18d1b4
[INFO] checking OLUWAMUYIWA/kvs against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOLUWAMUYIWA%2Fkvs" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/OLUWAMUYIWA/kvs on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/OLUWAMUYIWA/kvs
[INFO] finished tweaking git repo https://github.com/OLUWAMUYIWA/kvs
[INFO] tweaked toml for git repo https://github.com/OLUWAMUYIWA/kvs written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/OLUWAMUYIWA/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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded predicates-tree v1.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5d292b7a90f3e6a6068ffdd6dfe2f0c4d7c8f359ce1d583032771e8fc96e23de
[INFO] running `Command { std: "docker" "start" "-a" "5d292b7a90f3e6a6068ffdd6dfe2f0c4d7c8f359ce1d583032771e8fc96e23de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d292b7a90f3e6a6068ffdd6dfe2f0c4d7c8f359ce1d583032771e8fc96e23de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d292b7a90f3e6a6068ffdd6dfe2f0c4d7c8f359ce1d583032771e8fc96e23de", kill_on_drop: false }`
[INFO] [stdout] 5d292b7a90f3e6a6068ffdd6dfe2f0c4d7c8f359ce1d583032771e8fc96e23de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9a5a3badf84f292a33947cb07395735da772babeb531737c02fbe12d69fdcd9
[INFO] running `Command { std: "docker" "start" "-a" "a9a5a3badf84f292a33947cb07395735da772babeb531737c02fbe12d69fdcd9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking predicates-core v1.0.2
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking predicates-tree v1.0.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking predicates v1.0.8
[INFO] [stderr]     Checking kvs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ops::Index`
[INFO] [stdout]  --> src/lib.rs:1:107
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, ffi::OsStr, fs::{self, File, OpenOptions}, io::{self, Read, Seek, Write}, ops::Index, path::{Path, PathBu...
[INFO] [stdout]   |                                                                                                           ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/lib.rs:158:20
[INFO] [stdout]     |
[INFO] [stdout] 158 |         .and_then(|v| {
[INFO] [stdout]     |                    ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `kvs::KvStore`
[INFO] [stdout]  --> src/bin/kvs.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use kvs::KvStore;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sub_match`
[INFO] [stdout]   --> src/bin/kvs.rs:38:22
[INFO] [stdout]    |
[INFO] [stdout] 38 |         ("set", Some(sub_match)) => {
[INFO] [stdout]    |                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_match`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sub_match`
[INFO] [stdout]   --> src/bin/kvs.rs:42:22
[INFO] [stdout]    |
[INFO] [stdout] 42 |         ("get", Some(sub_match)) => {
[INFO] [stdout]    |                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_match`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sub_match`
[INFO] [stdout]   --> src/bin/kvs.rs:45:21
[INFO] [stdout]    |
[INFO] [stdout] 45 |         ("rm", Some(sub_match)) => {
[INFO] [stdout]    |                     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_match`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stdout] warning: unused import: `kvs::KvStore`
[INFO] [stdout]  --> src/bin/kvs.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use kvs::KvStore;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sub_match`
[INFO] [stdout]   --> src/bin/kvs.rs:38:22
[INFO] [stdout]    |
[INFO] [stdout] 38 |         ("set", Some(sub_match)) => {
[INFO] [stdout]    |                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_match`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sub_match`
[INFO] [stdout]   --> src/bin/kvs.rs:42:22
[INFO] [stdout]    |
[INFO] [stdout] 42 |         ("get", Some(sub_match)) => {
[INFO] [stdout]    |                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_match`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sub_match`
[INFO] [stdout]   --> src/bin/kvs.rs:45:21
[INFO] [stdout]    |
[INFO] [stdout] 45 |         ("rm", Some(sub_match)) => {
[INFO] [stdout]    |                     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_match`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> tests/tests.rs:129:5
[INFO] [stdout]     |
[INFO] [stdout] 129 |     store.set("key1".to_owned(), "value1".to_owned());
[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] 129 |     let _ = store.set("key1".to_owned(), "value1".to_owned());
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> tests/tests.rs:130:5
[INFO] [stdout]     |
[INFO] [stdout] 130 |     store.set("key2".to_owned(), "value2".to_owned());
[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] 130 |     let _ = store.set("key2".to_owned(), "value2".to_owned());
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> tests/tests.rs:142:5
[INFO] [stdout]     |
[INFO] [stdout] 142 |     store.set("key1".to_owned(), "value1".to_owned());
[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] 142 |     let _ = store.set("key1".to_owned(), "value1".to_owned());
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> tests/tests.rs:145:5
[INFO] [stdout]     |
[INFO] [stdout] 145 |     store.set("key1".to_owned(), "value2".to_owned());
[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] 145 |     let _ = store.set("key1".to_owned(), "value2".to_owned());
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> tests/tests.rs:155:5
[INFO] [stdout]     |
[INFO] [stdout] 155 |     store.set("key1".to_owned(), "value1".to_owned());
[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] 155 |     let _ = store.set("key1".to_owned(), "value1".to_owned());
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> tests/tests.rs:164:5
[INFO] [stdout]     |
[INFO] [stdout] 164 |     store.set("key1".to_owned(), "value1".to_owned());
[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] 164 |     let _ = store.set("key1".to_owned(), "value1".to_owned());
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> tests/tests.rs:165:5
[INFO] [stdout]     |
[INFO] [stdout] 165 |     store.remove("key1".to_owned());
[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] 165 |     let _ = store.remove("key1".to_owned());
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ops::Index`
[INFO] [stdout]  --> src/lib.rs:1:107
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, ffi::OsStr, fs::{self, File, OpenOptions}, io::{self, Read, Seek, Write}, ops::Index, path::{Path, PathBu...
[INFO] [stdout]   |                                                                                                           ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/lib.rs:158:20
[INFO] [stdout]     |
[INFO] [stdout] 158 |         .and_then(|v| {
[INFO] [stdout]     |                    ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.50s
[INFO] running `Command { std: "docker" "inspect" "a9a5a3badf84f292a33947cb07395735da772babeb531737c02fbe12d69fdcd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9a5a3badf84f292a33947cb07395735da772babeb531737c02fbe12d69fdcd9", kill_on_drop: false }`
[INFO] [stdout] a9a5a3badf84f292a33947cb07395735da772babeb531737c02fbe12d69fdcd9