[INFO] cloning repository https://github.com/hb475721797/mini-redis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hb475721797/mini-redis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhb475721797%2Fmini-redis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhb475721797%2Fmini-redis'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 38db0b27e19e13947ba74093e6a9b5a34e72363d
[INFO] testing hb475721797/mini-redis against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhb475721797%2Fmini-redis" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hb475721797/mini-redis on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hb475721797/mini-redis
[INFO] finished tweaking git repo https://github.com/hb475721797/mini-redis
[INFO] tweaked toml for git repo https://github.com/hb475721797/mini-redis written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/hb475721797/mini-redis already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--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 tokio-macros v0.3.1
[INFO] [stderr]   Downloaded bytes v0.6.0
[INFO] [stderr]   Downloaded structopt v0.3.20
[INFO] [stderr]   Downloaded atoi v0.3.3
[INFO] [stderr]   Downloaded sharded-slab v0.1.0
[INFO] [stderr]   Downloaded tokio v0.3.1
[INFO] [stderr]   Downloaded loom v0.3.6
[INFO] [stderr]   Downloaded structopt-derive v0.4.13
[INFO] [stderr]   Downloaded generator v0.6.23
[INFO] [stderr]   Downloaded tracing-subscriber v0.2.14
[INFO] [stderr]   Downloaded mio v0.7.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1e204a56b9eb553cee3a23f6109ec85c62451d0469fb7749abb4f6dacd67c485
[INFO] running `Command { std: "docker" "start" "-a" "1e204a56b9eb553cee3a23f6109ec85c62451d0469fb7749abb4f6dacd67c485", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e204a56b9eb553cee3a23f6109ec85c62451d0469fb7749abb4f6dacd67c485", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e204a56b9eb553cee3a23f6109ec85c62451d0469fb7749abb4f6dacd67c485", kill_on_drop: false }`
[INFO] [stdout] 1e204a56b9eb553cee3a23f6109ec85c62451d0469fb7749abb4f6dacd67c485
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2eea56f86632d5bb79fc17f6c15eb07c3e6928eba1b8a8472c7f736c150e654
[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" "f2eea56f86632d5bb79fc17f6c15eb07c3e6928eba1b8a8472c7f736c150e654", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling regex-syntax v0.6.20
[INFO] [stderr]    Compiling pin-project-lite v0.1.11
[INFO] [stderr]    Compiling smallvec v1.4.2
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.7
[INFO] [stderr]    Compiling arc-swap v0.4.7
[INFO] [stderr]    Compiling bytes v0.6.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling tracing-core v0.1.17
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling instant v0.1.8
[INFO] [stderr]    Compiling sharded-slab v0.1.0
[INFO] [stderr]    Compiling lock_api v0.4.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling signal-hook-registry v1.2.1
[INFO] [stderr]    Compiling mio v0.7.4
[INFO] [stderr]    Compiling parking_lot_core v0.8.0
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tracing-log v0.1.1
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling parking_lot v0.11.0
[INFO] [stderr]    Compiling atoi v0.3.3
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling regex v1.4.1
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling matchers v0.0.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling async-stream-impl v0.2.1
[INFO] [stderr]    Compiling structopt-derive v0.4.13
[INFO] [stderr]    Compiling tokio-macros v0.3.1
[INFO] [stderr]    Compiling tokio v0.3.1
[INFO] [stderr]    Compiling async-stream v0.2.1
[INFO] [stderr]    Compiling tracing v0.1.21
[INFO] [stderr]    Compiling structopt v0.3.20
[INFO] [stderr]    Compiling pin-project v0.4.27
[INFO] [stderr]    Compiling tracing-futures v0.2.4
[INFO] [stderr]    Compiling tracing-serde v0.1.2
[INFO] [stderr]    Compiling tracing-subscriber v0.2.14
[INFO] [stderr]    Compiling w v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `instrument`
[INFO] [stdout]  --> src/server.rs:5:35
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tracing::{debug, error, info, instrument};
[INFO] [stdout]   |                                   ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::io::BufWriter`
[INFO] [stdout]  --> src/server.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use tokio::io::BufWriter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bytes::BytesMut`
[INFO] [stdout]   --> src/server.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use bytes::BytesMut;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/frame.rs:52:31
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     skip(src, (len + 2))
[INFO] [stdout]    |                               ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `instrument`
[INFO] [stdout]  --> src/cmd/get.rs:5:22
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tracing::{debug, instrument};
[INFO] [stdout]   |                      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `instrument`
[INFO] [stdout]  --> src/cmd/set.rs:7:22
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tracing::{debug, instrument};
[INFO] [stdout]   |                      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::cmd::Command`
[INFO] [stdout]  --> src/parse.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::cmd::Command;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/connection.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | /         loop {
[INFO] [stdout] 24 | |             if let Some(frame) = self.parse_frame()? {
[INFO] [stdout] 25 | |                 return Ok(Some(frame));
[INFO] [stdout] 26 | |             }
[INFO] [stdout] ...  |
[INFO] [stdout] 34 | |             }
[INFO] [stdout] 35 | |         }
[INFO] [stdout]    | |_________- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 38 |           Ok(Some(Frame::Null))
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/server.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let mut backoff = 1;
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shutdown`
[INFO] [stdout]   --> src/cmd/mod.rs:39:68
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub(crate) async fn apply(self, db: &Db, dst: &mut Connection, shutdown: &mut Shutdown) -> crate::Result<()> {
[INFO] [stdout]    |                                                                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_shutdown`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_name`
[INFO] [stdout]   --> src/cmd/unknown.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub(crate) fn get_name(&self) -> &str {
[INFO] [stdout]    |                   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/server.rs:109:13
[INFO] [stdout]     |
[INFO] [stdout] 109 |             backoff * 2;
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]  --> src/bin/server.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     tracing_subscriber::fmt::try_init();
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 51s
[INFO] running `Command { std: "docker" "inspect" "f2eea56f86632d5bb79fc17f6c15eb07c3e6928eba1b8a8472c7f736c150e654", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2eea56f86632d5bb79fc17f6c15eb07c3e6928eba1b8a8472c7f736c150e654", kill_on_drop: false }`
[INFO] [stdout] f2eea56f86632d5bb79fc17f6c15eb07c3e6928eba1b8a8472c7f736c150e654
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4b84bcd6ed710564acc9e29cf2be0c3cd1e4c3e0afed0dc97634dea480f1cbcb
[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" "4b84bcd6ed710564acc9e29cf2be0c3cd1e4c3e0afed0dc97634dea480f1cbcb", kill_on_drop: false }`
[INFO] [stderr]    Compiling w v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `instrument`
[INFO] [stdout]  --> src/server.rs:5:35
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tracing::{debug, error, info, instrument};
[INFO] [stdout]   |                                   ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::io::BufWriter`
[INFO] [stdout]  --> src/server.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use tokio::io::BufWriter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bytes::BytesMut`
[INFO] [stdout]   --> src/server.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use bytes::BytesMut;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/frame.rs:52:31
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     skip(src, (len + 2))
[INFO] [stdout]    |                               ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `instrument`
[INFO] [stdout]  --> src/cmd/get.rs:5:22
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tracing::{debug, instrument};
[INFO] [stdout]   |                      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `instrument`
[INFO] [stdout]  --> src/cmd/set.rs:7:22
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tracing::{debug, instrument};
[INFO] [stdout]   |                      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::cmd::Command`
[INFO] [stdout]  --> src/parse.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::cmd::Command;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/connection.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | /         loop {
[INFO] [stdout] 24 | |             if let Some(frame) = self.parse_frame()? {
[INFO] [stdout] 25 | |                 return Ok(Some(frame));
[INFO] [stdout] 26 | |             }
[INFO] [stdout] ...  |
[INFO] [stdout] 34 | |             }
[INFO] [stdout] 35 | |         }
[INFO] [stdout]    | |_________- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 38 |           Ok(Some(Frame::Null))
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/server.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let mut backoff = 1;
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shutdown`
[INFO] [stdout]   --> src/cmd/mod.rs:39:68
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub(crate) async fn apply(self, db: &Db, dst: &mut Connection, shutdown: &mut Shutdown) -> crate::Result<()> {
[INFO] [stdout]    |                                                                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_shutdown`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_name`
[INFO] [stdout]   --> src/cmd/unknown.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub(crate) fn get_name(&self) -> &str {
[INFO] [stdout]    |                   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/server.rs:109:13
[INFO] [stdout]     |
[INFO] [stdout] 109 |             backoff * 2;
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `instrument`
[INFO] [stdout]  --> src/server.rs:5:35
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tracing::{debug, error, info, instrument};
[INFO] [stdout]   |                                   ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::io::BufWriter`
[INFO] [stdout]  --> src/server.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use tokio::io::BufWriter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bytes::BytesMut`
[INFO] [stdout]   --> src/server.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use bytes::BytesMut;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/frame.rs:52:31
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     skip(src, (len + 2))
[INFO] [stdout]    |                               ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `instrument`
[INFO] [stdout]  --> src/cmd/get.rs:5:22
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tracing::{debug, instrument};
[INFO] [stdout]   |                      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `instrument`
[INFO] [stdout]  --> src/cmd/set.rs:7:22
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tracing::{debug, instrument};
[INFO] [stdout]   |                      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::cmd::Command`
[INFO] [stdout]  --> src/parse.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::cmd::Command;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]  --> src/bin/server.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     tracing_subscriber::fmt::try_init();
[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: unreachable expression
[INFO] [stdout]   --> src/connection.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | /         loop {
[INFO] [stdout] 24 | |             if let Some(frame) = self.parse_frame()? {
[INFO] [stdout] 25 | |                 return Ok(Some(frame));
[INFO] [stdout] 26 | |             }
[INFO] [stdout] ...  |
[INFO] [stdout] 34 | |             }
[INFO] [stdout] 35 | |         }
[INFO] [stdout]    | |_________- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 38 |           Ok(Some(Frame::Null))
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/server.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let mut backoff = 1;
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shutdown`
[INFO] [stdout]   --> src/cmd/mod.rs:39:68
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub(crate) async fn apply(self, db: &Db, dst: &mut Connection, shutdown: &mut Shutdown) -> crate::Result<()> {
[INFO] [stdout]    |                                                                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_shutdown`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_name`
[INFO] [stdout]   --> src/cmd/unknown.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub(crate) fn get_name(&self) -> &str {
[INFO] [stdout]    |                   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/server.rs:109:13
[INFO] [stdout]     |
[INFO] [stdout] 109 |             backoff * 2;
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.81s
[INFO] running `Command { std: "docker" "inspect" "4b84bcd6ed710564acc9e29cf2be0c3cd1e4c3e0afed0dc97634dea480f1cbcb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b84bcd6ed710564acc9e29cf2be0c3cd1e4c3e0afed0dc97634dea480f1cbcb", kill_on_drop: false }`
[INFO] [stdout] 4b84bcd6ed710564acc9e29cf2be0c3cd1e4c3e0afed0dc97634dea480f1cbcb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 25848c8e4dca8c769fdbf55a26ad15a5a804f289120eb2d28df4f7e074ed70b0
[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" "25848c8e4dca8c769fdbf55a26ad15a5a804f289120eb2d28df4f7e074ed70b0", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `instrument`
[INFO] [stderr]  --> src/server.rs:5:35
[INFO] [stderr]   |
[INFO] [stderr] 5 | use tracing::{debug, error, info, instrument};
[INFO] [stderr]   |                                   ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::io::BufWriter`
[INFO] [stderr]  --> src/server.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use tokio::io::BufWriter;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `bytes::BytesMut`
[INFO] [stderr]   --> src/server.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use bytes::BytesMut;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/frame.rs:52:31
[INFO] [stderr]    |
[INFO] [stderr] 52 |                     skip(src, (len + 2))
[INFO] [stderr]    |                               ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `instrument`
[INFO] [stderr]  --> src/cmd/get.rs:5:22
[INFO] [stderr]   |
[INFO] [stderr] 5 | use tracing::{debug, instrument};
[INFO] [stderr]   |                      ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `instrument`
[INFO] [stderr]  --> src/cmd/set.rs:7:22
[INFO] [stderr]   |
[INFO] [stderr] 7 | use tracing::{debug, instrument};
[INFO] [stderr]   |                      ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::cmd::Command`
[INFO] [stderr]  --> src/parse.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::cmd::Command;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/connection.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 23 | /         loop {
[INFO] [stderr] 24 | |             if let Some(frame) = self.parse_frame()? {
[INFO] [stderr] 25 | |                 return Ok(Some(frame));
[INFO] [stderr] 26 | |             }
[INFO] [stderr] ...  |
[INFO] [stderr] 34 | |             }
[INFO] [stderr] 35 | |         }
[INFO] [stderr]    | |_________- any code following this expression is unreachable
[INFO] [stderr] ...
[INFO] [stderr] 38 |           Ok(Some(Frame::Null))
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/server.rs:95:13
[INFO] [stderr]    |
[INFO] [stderr] 95 |         let mut backoff = 1;
[INFO] [stderr]    |             ----^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `shutdown`
[INFO] [stderr]   --> src/cmd/mod.rs:39:68
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub(crate) async fn apply(self, db: &Db, dst: &mut Connection, shutdown: &mut Shutdown) -> crate::Result<()> {
[INFO] [stderr]    |                                                                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_shutdown`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_name`
[INFO] [stderr]   --> src/cmd/unknown.rs:13:19
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub(crate) fn get_name(&self) -> &str {
[INFO] [stderr]    |                   ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/server.rs:109:13
[INFO] [stderr]     |
[INFO] [stderr] 109 |             backoff * 2;
[INFO] [stderr]     |             ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `instrument`
[INFO] [stderr]  --> src/server.rs:5:35
[INFO] [stderr]   |
[INFO] [stderr] 5 | use tracing::{debug, error, info, instrument};
[INFO] [stderr]   |                                   ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::io::BufWriter`
[INFO] [stderr]  --> src/server.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use tokio::io::BufWriter;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `bytes::BytesMut`
[INFO] [stderr]   --> src/server.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use bytes::BytesMut;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/frame.rs:52:31
[INFO] [stderr]    |
[INFO] [stderr] 52 |                     skip(src, (len + 2))
[INFO] [stderr]    |                               ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `instrument`
[INFO] [stderr]  --> src/cmd/get.rs:5:22
[INFO] [stderr]   |
[INFO] [stderr] 5 | use tracing::{debug, instrument};
[INFO] [stderr]   |                      ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `instrument`
[INFO] [stderr]  --> src/cmd/set.rs:7:22
[INFO] [stderr]   |
[INFO] [stderr] 7 | use tracing::{debug, instrument};
[INFO] [stderr]   |                      ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::cmd::Command`
[INFO] [stderr]  --> src/parse.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::cmd::Command;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/connection.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 23 | /         loop {
[INFO] [stderr] 24 | |             if let Some(frame) = self.parse_frame()? {
[INFO] [stderr] 25 | |                 return Ok(Some(frame));
[INFO] [stderr] 26 | |             }
[INFO] [stderr] ...  |
[INFO] [stderr] 34 | |             }
[INFO] [stderr] 35 | |         }
[INFO] [stderr]    | |_________- any code following this expression is unreachable
[INFO] [stderr] ...
[INFO] [stderr] 38 |           Ok(Some(Frame::Null))
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/server.rs:95:13
[INFO] [stderr]    |
[INFO] [stderr] 95 |         let mut backoff = 1;
[INFO] [stderr]    |             ----^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `shutdown`
[INFO] [stderr]   --> src/cmd/mod.rs:39:68
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub(crate) async fn apply(self, db: &Db, dst: &mut Connection, shutdown: &mut Shutdown) -> crate::Result<()> {
[INFO] [stderr]    |                                                                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_shutdown`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_name`
[INFO] [stderr]   --> src/cmd/unknown.rs:13:19
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub(crate) fn get_name(&self) -> &str {
[INFO] [stderr]    |                   ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/server.rs:109:13
[INFO] [stderr]     |
[INFO] [stderr] 109 |             backoff * 2;
[INFO] [stderr]     |             ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/bin/server.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     tracing_subscriber::fmt::try_init();
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/w-e6cf22ea26bd9f61
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/w_cli-626ccf5b7c9e4e9d
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/w_server-11b94e1020082eb6
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests w
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> /opt/rustwide/workdir/src/frame.rs:52:31
[INFO] [stderr]    |
[INFO] [stderr] 52 |                     skip(src, (len + 2))
[INFO] [stderr]    |                               ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "25848c8e4dca8c769fdbf55a26ad15a5a804f289120eb2d28df4f7e074ed70b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25848c8e4dca8c769fdbf55a26ad15a5a804f289120eb2d28df4f7e074ed70b0", kill_on_drop: false }`
[INFO] [stdout] 25848c8e4dca8c769fdbf55a26ad15a5a804f289120eb2d28df4f7e074ed70b0