[INFO] cloning repository https://github.com/ymgyt/tokio-mini-redis-handson
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ymgyt/tokio-mini-redis-handson" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fymgyt%2Ftokio-mini-redis-handson", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fymgyt%2Ftokio-mini-redis-handson'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 055e792b048e97c81d21001eabb1c4492a3a8950
[INFO] checking ymgyt/tokio-mini-redis-handson against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fymgyt%2Ftokio-mini-redis-handson" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ymgyt/tokio-mini-redis-handson on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ymgyt/tokio-mini-redis-handson
[INFO] finished tweaking git repo https://github.com/ymgyt/tokio-mini-redis-handson
[INFO] tweaked toml for git repo https://github.com/ymgyt/tokio-mini-redis-handson written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/ymgyt/tokio-mini-redis-handson already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f1ceb8cdff201c51f3bb92946384e84147a52fddfcc3134e5ed880b3743e003e
[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" "f1ceb8cdff201c51f3bb92946384e84147a52fddfcc3134e5ed880b3743e003e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f1ceb8cdff201c51f3bb92946384e84147a52fddfcc3134e5ed880b3743e003e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1ceb8cdff201c51f3bb92946384e84147a52fddfcc3134e5ed880b3743e003e", kill_on_drop: false }`
[INFO] [stdout] f1ceb8cdff201c51f3bb92946384e84147a52fddfcc3134e5ed880b3743e003e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c0e7102d140ebea5eb870cea35793d2354db0df463c4edf648327d633ea5e81d
[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" "c0e7102d140ebea5eb870cea35793d2354db0df463c4edf648327d633ea5e81d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]     Checking tracing-core v0.1.13
[INFO] [stderr]     Checking sharded-slab v0.0.9
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]     Checking atoi v0.3.2
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking clap v2.33.2
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking chrono v0.4.13
[INFO] [stderr]     Checking tracing-serde v0.1.1
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking tracing-subscriber v0.2.10
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling tracing-attributes v0.1.9
[INFO] [stderr]    Compiling async-stream-impl v0.2.1
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling structopt-derive v0.4.9
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking async-stream v0.2.1
[INFO] [stderr]     Checking tracing v0.1.18
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking structopt v0.3.16
[INFO] [stderr]     Checking mini_redis v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::sync::Arc`
[INFO] [stdout]  --> src/server.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync::Arc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TcpStream`
[INFO] [stdout]  --> src/server.rs:3:31
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::net::{TcpListener, TcpStream};
[INFO] [stdout]   |                               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Semaphore`, `broadcast`, `mpsc`
[INFO] [stdout]  --> src/server.rs:4:19
[INFO] [stdout]   |
[INFO] [stdout] 4 | use tokio::sync::{broadcast, mpsc, Semaphore};
[INFO] [stdout]   |                   ^^^^^^^^^  ^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Duration`, `self`
[INFO] [stdout]  --> src/server.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tokio::time::{self, Duration};
[INFO] [stdout]   |                   ^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `debug`, `error`, `info`, `instrument`
[INFO] [stdout]  --> src/server.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use tracing::{debug, error, info, instrument};
[INFO] [stdout]   |               ^^^^^  ^^^^^  ^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `listener`
[INFO] [stdout]  --> src/server.rs:8:18
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub async fn run(listener: TcpListener, shutdown: impl Future) -> crate::Result<()> {
[INFO] [stdout]   |                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_listener`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shutdown`
[INFO] [stdout]  --> src/server.rs:8:41
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub async fn run(listener: TcpListener, shutdown: impl Future) -> crate::Result<()> {
[INFO] [stdout]   |                                         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_shutdown`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::Arc`
[INFO] [stdout]  --> src/server.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync::Arc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TcpStream`
[INFO] [stdout]  --> src/server.rs:3:31
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::net::{TcpListener, TcpStream};
[INFO] [stdout]   |                               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Semaphore`, `broadcast`, `mpsc`
[INFO] [stdout]  --> src/server.rs:4:19
[INFO] [stdout]   |
[INFO] [stdout] 4 | use tokio::sync::{broadcast, mpsc, Semaphore};
[INFO] [stdout]   |                   ^^^^^^^^^  ^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Duration`, `self`
[INFO] [stdout]  --> src/server.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tokio::time::{self, Duration};
[INFO] [stdout]   |                   ^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `debug`, `error`, `info`, `instrument`
[INFO] [stdout]  --> src/server.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use tracing::{debug, error, info, instrument};
[INFO] [stdout]   |               ^^^^^  ^^^^^  ^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `listener`
[INFO] [stdout]  --> src/server.rs:8:18
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub async fn run(listener: TcpListener, shutdown: impl Future) -> crate::Result<()> {
[INFO] [stdout]   |                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_listener`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shutdown`
[INFO] [stdout]  --> src/server.rs:8:41
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub async fn run(listener: TcpListener, shutdown: impl Future) -> crate::Result<()> {
[INFO] [stdout]   |                                         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_shutdown`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.20s
[INFO] running `Command { std: "docker" "inspect" "c0e7102d140ebea5eb870cea35793d2354db0df463c4edf648327d633ea5e81d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0e7102d140ebea5eb870cea35793d2354db0df463c4edf648327d633ea5e81d", kill_on_drop: false }`
[INFO] [stdout] c0e7102d140ebea5eb870cea35793d2354db0df463c4edf648327d633ea5e81d