[INFO] cloning repository https://github.com/msakuta/rudis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/msakuta/rudis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmsakuta%2Frudis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmsakuta%2Frudis'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3dffe3d8b8f7e46922cf0333f89f7dcd9f7718a6
[INFO] checking msakuta/rudis against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmsakuta%2Frudis" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/msakuta/rudis on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/msakuta/rudis
[INFO] finished tweaking git repo https://github.com/msakuta/rudis
[INFO] tweaked toml for git repo https://github.com/msakuta/rudis written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/msakuta/rudis 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded redis v0.23.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f680435191414e7a114583922b3d073da837767b153b1679acf887498da81c69
[INFO] running `Command { std: "docker" "start" "-a" "f680435191414e7a114583922b3d073da837767b153b1679acf887498da81c69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f680435191414e7a114583922b3d073da837767b153b1679acf887498da81c69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f680435191414e7a114583922b3d073da837767b153b1679acf887498da81c69", kill_on_drop: false }`
[INFO] [stdout] f680435191414e7a114583922b3d073da837767b153b1679acf887498da81c69
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 56d844c37c7a69687f670c8ca720e902f770eecd7f66d855b3e15b2e8757de9a
[INFO] running `Command { std: "docker" "start" "-a" "56d844c37c7a69687f670c8ca720e902f770eecd7f66d855b3e15b2e8757de9a", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-normalization v0.1.22
[INFO] [stderr]     Checking unicode-bidi v0.3.13
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]     Checking sha1_smol v1.0.0
[INFO] [stderr]     Checking form_urlencoded v1.2.0
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking idna v0.4.0
[INFO] [stderr]     Checking combine v4.6.6
[INFO] [stderr]     Checking url v2.4.1
[INFO] [stderr]     Checking redis v0.23.3
[INFO] [stderr]     Checking rudis v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/client.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | /     loop {
[INFO] [stdout] 48 | |         let resp = deserialize(&mut con)?;
[INFO] [stdout] 49 | |         println!("Got some answer: {resp:?}");
[INFO] [stdout] 50 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 51 |       unreachable!()
[INFO] [stdout]    |       ^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `$crate::panic::unreachable_2021` which comes from the expansion of the macro `unreachable` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/client.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | /     loop {
[INFO] [stdout] 48 | |         let resp = deserialize(&mut con)?;
[INFO] [stdout] 49 | |         println!("Got some answer: {resp:?}");
[INFO] [stdout] 50 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 51 |       unreachable!()
[INFO] [stdout]    |       ^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `$crate::panic::unreachable_2021` which comes from the expansion of the macro `unreachable` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/client.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 82 | /     loop {
[INFO] [stdout] 83 | |         con.publish("channel", "Hey from Rust")?;
[INFO] [stdout] 84 | |         std::thread::sleep(Duration::from_secs(1));
[INFO] [stdout] 85 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 86 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/client.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 82 | /     loop {
[INFO] [stdout] 83 | |         con.publish("channel", "Hey from Rust")?;
[INFO] [stdout] 84 | |         std::thread::sleep(Duration::from_secs(1));
[INFO] [stdout] 85 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 86 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `as_str` is never used
[INFO] [stdout]   --> src/redis_value.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl RedisValue {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 13 |     pub(crate) fn as_str(&self) -> Option<&str> {
[INFO] [stdout]    |                   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serialize_null` is never used
[INFO] [stdout]   --> src/ser.rs:32:15
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub(crate) fn serialize_null(f: &mut impl Write) -> std::io::Result<()> {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `as_str` is never used
[INFO] [stdout]   --> src/redis_value.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl RedisValue {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 13 |     pub(crate) fn as_str(&self) -> Option<&str> {
[INFO] [stdout]    |                   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serialize_null` is never used
[INFO] [stdout]   --> src/ser.rs:32:15
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub(crate) fn serialize_null(f: &mut impl Write) -> std::io::Result<()> {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `clock` is never used
[INFO] [stdout]   --> src/serve.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn clock(server: Arc<Mutex<Server>>) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serialize_str_array` is never used
[INFO] [stdout]   --> src/ser.rs:36:15
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub(crate) fn serialize_str_array(
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `clock` is never used
[INFO] [stdout]   --> src/serve.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn clock(server: Arc<Mutex<Server>>) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serialize_str_array` is never used
[INFO] [stdout]   --> src/ser.rs:36:15
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub(crate) fn serialize_str_array(
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.61s
[INFO] running `Command { std: "docker" "inspect" "56d844c37c7a69687f670c8ca720e902f770eecd7f66d855b3e15b2e8757de9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56d844c37c7a69687f670c8ca720e902f770eecd7f66d855b3e15b2e8757de9a", kill_on_drop: false }`
[INFO] [stdout] 56d844c37c7a69687f670c8ca720e902f770eecd7f66d855b3e15b2e8757de9a