[INFO] cloning repository https://github.com/vjekooo/redis-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vjekooo/redis-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvjekooo%2Fredis-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvjekooo%2Fredis-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7829608e7a61a5fbbfdf7a83ede0540e0e362f36
[INFO] checking vjekooo/redis-rust against master#0d56e340472882fa673d4b98d0802b9a799879d0 for pr-101692
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvjekooo%2Fredis-rust" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vjekooo/redis-rust on toolchain 0d56e340472882fa673d4b98d0802b9a799879d0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d56e340472882fa673d4b98d0802b9a799879d0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/vjekooo/redis-rust
[INFO] finished tweaking git repo https://github.com/vjekooo/redis-rust
[INFO] tweaked toml for git repo https://github.com/vjekooo/redis-rust written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/vjekooo/redis-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d56e340472882fa673d4b98d0802b9a799879d0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gloo-timers v0.2.4
[INFO] [stderr]   Downloaded blocking v1.2.0
[INFO] [stderr]   Downloaded ctor v0.1.22
[INFO] [stderr]   Downloaded async-global-executor v2.0.4
[INFO] [stderr]   Downloaded async-std v1.11.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:e92e462e59ac3446a933540fd361ddeb5362c86f92d432d6a560a917a465022e" "/opt/rustwide/cargo-home/bin/cargo" "+0d56e340472882fa673d4b98d0802b9a799879d0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c6848dd92a459a65935e7c7357c6426c7af6cf3eae6563305f5c1aca537a2585
[INFO] running `Command { std: "docker" "start" "-a" "c6848dd92a459a65935e7c7357c6426c7af6cf3eae6563305f5c1aca537a2585", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c6848dd92a459a65935e7c7357c6426c7af6cf3eae6563305f5c1aca537a2585", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6848dd92a459a65935e7c7357c6426c7af6cf3eae6563305f5c1aca537a2585", kill_on_drop: false }`
[INFO] [stdout] c6848dd92a459a65935e7c7357c6426c7af6cf3eae6563305f5c1aca537a2585
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:e92e462e59ac3446a933540fd361ddeb5362c86f92d432d6a560a917a465022e" "/opt/rustwide/cargo-home/bin/cargo" "+0d56e340472882fa673d4b98d0802b9a799879d0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 47dc2b0415961740b3fcd0758030f766017fcf641a79586353d9e36438597e69
[INFO] running `Command { std: "docker" "start" "-a" "47dc2b0415961740b3fcd0758030f766017fcf641a79586353d9e36438597e69", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking futures-io v0.3.21
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]     Checking pin-project-lite v0.2.8
[INFO] [stderr]    Compiling libc v0.2.123
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]     Checking cache-padded v1.2.0
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking event-listener v2.5.2
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking async-task v4.2.0
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking async-lock v2.5.0
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.8
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking blocking v1.2.0
[INFO] [stderr]    Compiling ctor v0.1.22
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]     Checking polling v2.2.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking async-io v1.6.0
[INFO] [stderr]     Checking async-global-executor v2.0.4
[INFO] [stderr]     Checking async-std v1.11.0
[INFO] [stderr]     Checking futures-executor v0.3.21
[INFO] [stderr]     Checking futures v0.3.21
[INFO] [stderr]     Checking redis v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/main.rs:52:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn from(e: io::Error) -> Self {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `existing_value` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:84:13
[INFO] [stdout]    |
[INFO] [stdout] 84 |         let existing_value;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_existing_value` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `existing_value` is never read
[INFO] [stdout]   --> src/main.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |             existing_value = response;
[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: unused variable: `e`
[INFO] [stdout]   --> src/main.rs:52:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn from(e: io::Error) -> Self {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `existing_value` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:84:13
[INFO] [stdout]    |
[INFO] [stdout] 84 |         let existing_value;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_existing_value` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `existing_value` is never read
[INFO] [stdout]   --> src/main.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |             existing_value = response;
[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: function `split_string` is never used
[INFO] [stdout]    --> src/main.rs:136:4
[INFO] [stdout]     |
[INFO] [stdout] 136 | fn split_string(key: &String) -> Result<Vec<&str>, Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Ex`, `Exat` and `Pxat` are never constructed
[INFO] [stdout]    --> src/main.rs:147:5
[INFO] [stdout]     |
[INFO] [stdout] 146 | enum TimeToLive {
[INFO] [stdout]     |      ---------- variants in this enum
[INFO] [stdout] 147 |     Ex(String),
[INFO] [stdout]     |     ^^
[INFO] [stdout] 148 |     Px(String),
[INFO] [stdout] 149 |     Exat(String),
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 150 |     Pxat(String),
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `SimpleString`, `Error` and `Integer` are never constructed
[INFO] [stdout]    --> src/main.rs:185:5
[INFO] [stdout]     |
[INFO] [stdout] 184 | enum RespValues {
[INFO] [stdout]     |      ---------- variants in this enum
[INFO] [stdout] 185 |     SimpleString(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 186 |     Error(Vec<u8>),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 187 |     Integer(i64),
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `delete` is never used
[INFO] [stdout]    --> src/main.rs:108:14
[INFO] [stdout]     |
[INFO] [stdout] 108 |     async fn delete(&mut self, key: String) -> Result<String, Error> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `rename` is never used
[INFO] [stdout]    --> src/main.rs:117:14
[INFO] [stdout]     |
[INFO] [stdout] 117 |     async fn rename(&mut self, key: String, new_key: String) -> Result<String, Error> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `split_string` is never used
[INFO] [stdout]    --> src/main.rs:136:4
[INFO] [stdout]     |
[INFO] [stdout] 136 | fn split_string(key: &String) -> Result<Vec<&str>, Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Ex`, `Exat` and `Pxat` are never constructed
[INFO] [stdout]    --> src/main.rs:147:5
[INFO] [stdout]     |
[INFO] [stdout] 146 | enum TimeToLive {
[INFO] [stdout]     |      ---------- variants in this enum
[INFO] [stdout] 147 |     Ex(String),
[INFO] [stdout]     |     ^^
[INFO] [stdout] 148 |     Px(String),
[INFO] [stdout] 149 |     Exat(String),
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 150 |     Pxat(String),
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `SimpleString`, `Error` and `Integer` are never constructed
[INFO] [stdout]    --> src/main.rs:185:5
[INFO] [stdout]     |
[INFO] [stdout] 184 | enum RespValues {
[INFO] [stdout]     |      ---------- variants in this enum
[INFO] [stdout] 185 |     SimpleString(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 186 |     Error(Vec<u8>),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 187 |     Integer(i64),
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `delete` is never used
[INFO] [stdout]    --> src/main.rs:108:14
[INFO] [stdout]     |
[INFO] [stdout] 108 |     async fn delete(&mut self, key: String) -> Result<String, Error> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `rename` is never used
[INFO] [stdout]    --> src/main.rs:117:14
[INFO] [stdout]     |
[INFO] [stdout] 117 |     async fn rename(&mut self, key: String, new_key: String) -> Result<String, Error> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | /     client
[INFO] [stdout] 9  | |         .set(
[INFO] [stdout] 10 | |             "vjeko".into(),
[INFO] [stdout] 11 | |             "keks".into(),
[INFO] [stdout] ...  |
[INFO] [stdout] 14 | |         )
[INFO] [stdout] 15 | |         .await;
[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 `Result` that must be used
[INFO] [stdout]   --> src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | /     client
[INFO] [stdout] 9  | |         .set(
[INFO] [stdout] 10 | |             "vjeko".into(),
[INFO] [stdout] 11 | |             "keks".into(),
[INFO] [stdout] ...  |
[INFO] [stdout] 14 | |         )
[INFO] [stdout] 15 | |         .await;
[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: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.18s
[INFO] running `Command { std: "docker" "inspect" "47dc2b0415961740b3fcd0758030f766017fcf641a79586353d9e36438597e69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47dc2b0415961740b3fcd0758030f766017fcf641a79586353d9e36438597e69", kill_on_drop: false }`
[INFO] [stdout] 47dc2b0415961740b3fcd0758030f766017fcf641a79586353d9e36438597e69