[INFO] cloning repository https://github.com/disappear00/my-redis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/disappear00/my-redis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdisappear00%2Fmy-redis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdisappear00%2Fmy-redis'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 08402db8601439998bdd48defb303381c8215ba8
[INFO] checking disappear00/my-redis against try#8e819ff5434466e9a823e03871a1775ac7d84ddf for pr-156027
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdisappear00%2Fmy-redis" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/disappear00/my-redis
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/disappear00/my-redis
[INFO] tweaked toml for git repo https://github.com/disappear00/my-redis written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/disappear00/my-redis on toolchain 8e819ff5434466e9a823e03871a1775ac7d84ddf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8e819ff5434466e9a823e03871a1775ac7d84ddf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/disappear00/my-redis 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" "+8e819ff5434466e9a823e03871a1775ac7d84ddf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8e819ff5434466e9a823e03871a1775ac7d84ddf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6bb684d342f142c0f8888ca8ae26a88a3cba1299b987ff09458377d915b876c5
[INFO] running `Command { std: "docker" "start" "-a" "6bb684d342f142c0f8888ca8ae26a88a3cba1299b987ff09458377d915b876c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6bb684d342f142c0f8888ca8ae26a88a3cba1299b987ff09458377d915b876c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bb684d342f142c0f8888ca8ae26a88a3cba1299b987ff09458377d915b876c5", kill_on_drop: false }`
[INFO] [stdout] 6bb684d342f142c0f8888ca8ae26a88a3cba1299b987ff09458377d915b876c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8e819ff5434466e9a823e03871a1775ac7d84ddf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 288d411a62b569f0b14d1b4a7baf955474351b750d18c2ae528fbac86a754b6b
[INFO] running `Command { std: "docker" "start" "-a" "288d411a62b569f0b14d1b4a7baf955474351b750d18c2ae528fbac86a754b6b", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking parking_lot_core v0.9.12
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking errno v0.3.14
[INFO] [stderr]     Checking futures-channel v0.3.32
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking serde v1.0.228
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking regex-automata v0.4.14
[INFO] [stderr]     Checking socket2 v0.6.3
[INFO] [stderr]    Compiling pin-project-internal v1.1.11
[INFO] [stderr]    Compiling futures-macro v0.3.32
[INFO] [stderr]     Checking tracing v0.1.44
[INFO] [stderr]    Compiling tokio-macros v2.6.1
[INFO] [stderr]     Checking mio v1.2.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.8
[INFO] [stderr]     Checking tracing-log v0.1.4
[INFO] [stderr]     Checking parking_lot v0.12.5
[INFO] [stderr]    Compiling async-stream-impl v0.3.6
[INFO] [stderr]     Checking async-stream v0.3.6
[INFO] [stderr]     Checking tracing-serde v0.1.3
[INFO] [stderr]     Checking tokio v1.50.0
[INFO] [stderr]     Checking futures-util v0.3.32
[INFO] [stderr]     Checking pin-project v1.1.11
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking regex v1.12.3
[INFO] [stderr]     Checking chrono v0.4.44
[INFO] [stderr]     Checking atoi v0.3.3
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking tracing-subscriber v0.2.25
[INFO] [stderr]     Checking futures-executor v0.3.32
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking futures v0.3.32
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking tokio-stream v0.1.18
[INFO] [stderr]     Checking mini-redis v0.4.1
[INFO] [stderr]     Checking my-redis v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `tx1`
[INFO] [stdout]   --> src/bin/select-future.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let (tx1, rx1) = oneshot::channel();
[INFO] [stdout]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx2`
[INFO] [stdout]   --> src/bin/select-future.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let (tx2, rx2) = oneshot::channel();
[INFO] [stdout]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/bin/tcp-select.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 17 | /             loop {
[INFO] [stdout] 18 | |                 let (socket, _) = listener.accept().await?;
[INFO] [stdout] 19 | |                 tokio::spawn(async move { process(socket) });
[INFO] [stdout] 20 | |             }
[INFO] [stdout]    | |_____________- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 23 |               Ok::<_, io::Error>(())
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx1`
[INFO] [stdout]  --> src/bin/loop-select.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let (tx1,mut rx1) = mpsc::channel(128);
[INFO] [stdout]   |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx2`
[INFO] [stdout]  --> src/bin/loop-select.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (tx2,mut rx2) = mpsc::channel(128);
[INFO] [stdout]   |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx3`
[INFO] [stdout]  --> src/bin/loop-select.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let (tx3,mut rx3) = mpsc::channel(128);
[INFO] [stdout]   |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/tcp-select.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mut listener = TcpListener::bind("localhost:3465").await?;
[INFO] [stdout]    |         ----^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `socket`
[INFO] [stdout]   --> src/bin/tcp-select.rs:33:18
[INFO] [stdout]    |
[INFO] [stdout] 33 | async fn process(socket: TcpStream) {
[INFO] [stdout]    |                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_socket`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/bin/mini-tokio.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ShardedDb` is never used
[INFO] [stdout]  --> src/bin/server.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | type ShardedDb = Arc<Vec<Mutex<HashMap<String,Vec<u8>>>>>;
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `new_sharded_db` is never used
[INFO] [stdout]  --> src/bin/server.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn new_sharded_db(num_shards: usize) -> ShardedDb {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process` is never used
[INFO] [stdout]   --> src/bin/server.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 | async fn process(socket: TcpStream) {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process2` is never used
[INFO] [stdout]   --> src/bin/server.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 | async fn process2(socket: TcpStream) {
[INFO] [stdout]    |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/mini-tokio.rs:153:9
[INFO] [stdout]     |
[INFO] [stdout] 153 |     let mut mini_tokio = MiniTokio::new();
[INFO] [stdout]     |         ----^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `what_is_this`
[INFO] [stdout]   --> src/bin/async-future.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let what_is_this = my_async_fn();
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_what_is_this`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/loop-select2.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let (mut tx,mut rx) = tokio::sync::mpsc::channel(128);
[INFO] [stdout]    |          ----^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/loop-select2.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let (mut tx,mut rx) = tokio::sync::mpsc::channel(128);
[INFO] [stdout]    |          ----^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: invalid character ' ' in crate name: `loop_select2 copy`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `my-redis` (bin "loop-select2 copy" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `tx1`
[INFO] [stdout]  --> src/bin/loop-select.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let (tx1,mut rx1) = mpsc::channel(128);
[INFO] [stdout]   |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx2`
[INFO] [stdout]  --> src/bin/loop-select.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (tx2,mut rx2) = mpsc::channel(128);
[INFO] [stdout]   |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx3`
[INFO] [stdout]  --> src/bin/loop-select.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let (tx3,mut rx3) = mpsc::channel(128);
[INFO] [stdout]   |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx1`
[INFO] [stdout]   --> src/bin/select-future.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let (tx1, rx1) = oneshot::channel();
[INFO] [stdout]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx2`
[INFO] [stdout]   --> src/bin/select-future.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let (tx2, rx2) = oneshot::channel();
[INFO] [stdout]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ShardedDb` is never used
[INFO] [stdout]  --> src/bin/server.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | type ShardedDb = Arc<Vec<Mutex<HashMap<String,Vec<u8>>>>>;
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `new_sharded_db` is never used
[INFO] [stdout]  --> src/bin/server.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn new_sharded_db(num_shards: usize) -> ShardedDb {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process` is never used
[INFO] [stdout]   --> src/bin/server.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 | async fn process(socket: TcpStream) {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process2` is never used
[INFO] [stdout]   --> src/bin/server.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 | async fn process2(socket: TcpStream) {
[INFO] [stdout]    |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `what_is_this`
[INFO] [stdout]   --> src/bin/async-future.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let what_is_this = my_async_fn();
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_what_is_this`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "288d411a62b569f0b14d1b4a7baf955474351b750d18c2ae528fbac86a754b6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "288d411a62b569f0b14d1b4a7baf955474351b750d18c2ae528fbac86a754b6b", kill_on_drop: false }`
[INFO] [stdout] 288d411a62b569f0b14d1b4a7baf955474351b750d18c2ae528fbac86a754b6b
