[INFO] cloning repository https://github.com/SirGFM/rusty-but-fast
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SirGFM/rusty-but-fast" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSirGFM%2Frusty-but-fast", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSirGFM%2Frusty-but-fast'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 65a81cd60661abd7c448d05c355f69fcbff6d5c5
[INFO] testing SirGFM/rusty-but-fast against try#bd7d74411512a3dd3b35d2f699c51dd2557c7e7e+cargoflags=-Zbuild-dir-new-layout for pr-149852-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSirGFM%2Frusty-but-fast" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/SirGFM/rusty-but-fast
[INFO] finished tweaking git repo https://github.com/SirGFM/rusty-but-fast
[INFO] tweaked toml for git repo https://github.com/SirGFM/rusty-but-fast written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/SirGFM/rusty-but-fast on toolchain bd7d74411512a3dd3b35d2f699c51dd2557c7e7e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/SirGFM/rusty-but-fast 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" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] efe9b26a071f6306f8de2cbef3e63c0ac0b51667e784296b9254b479793f13b6
[INFO] running `Command { std: "docker" "start" "-a" "efe9b26a071f6306f8de2cbef3e63c0ac0b51667e784296b9254b479793f13b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "efe9b26a071f6306f8de2cbef3e63c0ac0b51667e784296b9254b479793f13b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efe9b26a071f6306f8de2cbef3e63c0ac0b51667e784296b9254b479793f13b6", kill_on_drop: false }`
[INFO] [stdout] efe9b26a071f6306f8de2cbef3e63c0ac0b51667e784296b9254b479793f13b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "build" "--frozen" "--message-format=json" "-Zbuild-dir-new-layout", kill_on_drop: false }`
[INFO] [stdout] d234f4db7039beb5c791ba7e95e26edc7847e098eec489f03e847e1225af236a
[INFO] running `Command { std: "docker" "start" "-a" "d234f4db7039beb5c791ba7e95e26edc7847e098eec489f03e847e1225af236a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling ctrlc v3.1.4
[INFO] [stderr]    Compiling rusty-but-fast v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `tag`
[INFO] [stdout]    --> src/tlv.rs:269:21
[INFO] [stdout]     |
[INFO] [stdout] 269 |                 let tag = Tag::from(*t);
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_tag`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `now`
[INFO] [stdout]    --> src/timer.rs:195:9
[INFO] [stdout]     |
[INFO] [stdout] 195 |     let now = time::Instant::now();
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_now`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/timer.rs:309:16
[INFO] [stdout]     |
[INFO] [stdout] 309 |             Ok(mut ok_data) => ok_data,
[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/timer.rs:321:20
[INFO] [stdout]     |
[INFO] [stdout] 321 |                 Ok(mut ok_data) => ok_data,
[INFO] [stdout]     |                    ----^^^^^^^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:310:17
[INFO] [stdout]     |
[INFO] [stdout] 310 |             Err(err) => {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:322:21
[INFO] [stdout]     |
[INFO] [stdout] 322 |                 Err(err) => {
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:338:17
[INFO] [stdout]     |
[INFO] [stdout] 338 |             Err(err) => return Err(Error::BadMessageTag),
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:351:17
[INFO] [stdout]     |
[INFO] [stdout] 351 |             Err(err) => {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:377:17
[INFO] [stdout]     |
[INFO] [stdout] 377 |             Err(err) => {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:403:13
[INFO] [stdout]     |
[INFO] [stdout] 403 |         Err(err) => {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:425:21
[INFO] [stdout]     |
[INFO] [stdout] 425 |                 Err(err) => {
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:437:13
[INFO] [stdout]     |
[INFO] [stdout] 437 |         Err(err) => {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:485:13
[INFO] [stdout]     |
[INFO] [stdout] 485 |         Err(err) => return Err(res.unwrap_err()),
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:489:13
[INFO] [stdout]     |
[INFO] [stdout] 489 |         Err(err) => {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:496:13
[INFO] [stdout]     |
[INFO] [stdout] 496 |         Err(err) => {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `read_arr` is never used
[INFO] [stdout]    --> src/tlv.rs:704:8
[INFO] [stdout]     |
[INFO] [stdout] 701 | impl<'a: 'b, 'b> TagParser<'a, 'b> {
[INFO] [stdout]     | ---------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 704 |     fn read_arr<T>(&mut self, out: &mut [T])
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::ErrorKind::WouldBlock as ErrWouldBlock`
[INFO] [stdout]   --> src/bin/timer_server.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     use std::io::ErrorKind::WouldBlock as ErrWouldBlock;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.30s
[INFO] running `Command { std: "docker" "inspect" "d234f4db7039beb5c791ba7e95e26edc7847e098eec489f03e847e1225af236a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d234f4db7039beb5c791ba7e95e26edc7847e098eec489f03e847e1225af236a", kill_on_drop: false }`
[INFO] [stdout] d234f4db7039beb5c791ba7e95e26edc7847e098eec489f03e847e1225af236a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "test" "--frozen" "--no-run" "--message-format=json" "-Zbuild-dir-new-layout", kill_on_drop: false }`
[INFO] [stdout] d3f5035686af249140810f06b0b9a451a503790343f3afacf7d3ea3e32c8034f
[INFO] running `Command { std: "docker" "start" "-a" "d3f5035686af249140810f06b0b9a451a503790343f3afacf7d3ea3e32c8034f", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `tag`
[INFO] [stdout]    --> src/tlv.rs:269:21
[INFO] [stdout]     |
[INFO] [stdout] 269 |                 let tag = Tag::from(*t);
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_tag`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `now`
[INFO] [stdout]    --> src/timer.rs:195:9
[INFO] [stdout]     |
[INFO] [stdout] 195 |     let now = time::Instant::now();
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_now`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/timer.rs:309:16
[INFO] [stdout]     |
[INFO] [stdout] 309 |             Ok(mut ok_data) => ok_data,
[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/timer.rs:321:20
[INFO] [stdout]     |
[INFO] [stdout] 321 |                 Ok(mut ok_data) => ok_data,
[INFO] [stdout]     |                    ----^^^^^^^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:310:17
[INFO] [stdout]     |
[INFO] [stdout] 310 |             Err(err) => {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:322:21
[INFO] [stdout]     |
[INFO] [stdout] 322 |                 Err(err) => {
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:338:17
[INFO] [stdout]     |
[INFO] [stdout] 338 |             Err(err) => return Err(Error::BadMessageTag),
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:351:17
[INFO] [stdout]     |
[INFO] [stdout] 351 |             Err(err) => {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:377:17
[INFO] [stdout]     |
[INFO] [stdout] 377 |             Err(err) => {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:403:13
[INFO] [stdout]     |
[INFO] [stdout] 403 |         Err(err) => {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:425:21
[INFO] [stdout]     |
[INFO] [stdout] 425 |                 Err(err) => {
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:437:13
[INFO] [stdout]     |
[INFO] [stdout] 437 |         Err(err) => {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rusty-but-fast v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:485:13
[INFO] [stdout]     |
[INFO] [stdout] 485 |         Err(err) => return Err(res.unwrap_err()),
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:489:13
[INFO] [stdout]     |
[INFO] [stdout] 489 |         Err(err) => {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:496:13
[INFO] [stdout]     |
[INFO] [stdout] 496 |         Err(err) => {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `read_arr` is never used
[INFO] [stdout]    --> src/tlv.rs:704:8
[INFO] [stdout]     |
[INFO] [stdout] 701 | impl<'a: 'b, 'b> TagParser<'a, 'b> {
[INFO] [stdout]     | ---------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 704 |     fn read_arr<T>(&mut self, out: &mut [T])
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::ErrorKind::WouldBlock as ErrWouldBlock`
[INFO] [stdout]   --> src/bin/timer_server.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     use std::io::ErrorKind::WouldBlock as ErrWouldBlock;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tag`
[INFO] [stdout]    --> src/tlv.rs:269:21
[INFO] [stdout]     |
[INFO] [stdout] 269 |                 let tag = Tag::from(*t);
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_tag`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `now`
[INFO] [stdout]    --> src/timer.rs:195:9
[INFO] [stdout]     |
[INFO] [stdout] 195 |     let now = time::Instant::now();
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_now`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/timer.rs:309:16
[INFO] [stdout]     |
[INFO] [stdout] 309 |             Ok(mut ok_data) => ok_data,
[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/timer.rs:321:20
[INFO] [stdout]     |
[INFO] [stdout] 321 |                 Ok(mut ok_data) => ok_data,
[INFO] [stdout]     |                    ----^^^^^^^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:310:17
[INFO] [stdout]     |
[INFO] [stdout] 310 |             Err(err) => {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:322:21
[INFO] [stdout]     |
[INFO] [stdout] 322 |                 Err(err) => {
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:338:17
[INFO] [stdout]     |
[INFO] [stdout] 338 |             Err(err) => return Err(Error::BadMessageTag),
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:351:17
[INFO] [stdout]     |
[INFO] [stdout] 351 |             Err(err) => {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:377:17
[INFO] [stdout]     |
[INFO] [stdout] 377 |             Err(err) => {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:403:13
[INFO] [stdout]     |
[INFO] [stdout] 403 |         Err(err) => {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:425:21
[INFO] [stdout]     |
[INFO] [stdout] 425 |                 Err(err) => {
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:437:13
[INFO] [stdout]     |
[INFO] [stdout] 437 |         Err(err) => {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:485:13
[INFO] [stdout]     |
[INFO] [stdout] 485 |         Err(err) => return Err(res.unwrap_err()),
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:489:13
[INFO] [stdout]     |
[INFO] [stdout] 489 |         Err(err) => {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/timer.rs:496:13
[INFO] [stdout]     |
[INFO] [stdout] 496 |         Err(err) => {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `Command { std: "docker" "inspect" "d3f5035686af249140810f06b0b9a451a503790343f3afacf7d3ea3e32c8034f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3f5035686af249140810f06b0b9a451a503790343f3afacf7d3ea3e32c8034f", kill_on_drop: false }`
[INFO] [stdout] d3f5035686af249140810f06b0b9a451a503790343f3afacf7d3ea3e32c8034f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "test" "--frozen" "-Zbuild-dir-new-layout", kill_on_drop: false }`
[INFO] [stdout] a10ea33468ce353a831fd0f0cdac028362261cf16227755d0d32a292b85ca11e
[INFO] running `Command { std: "docker" "start" "-a" "a10ea33468ce353a831fd0f0cdac028362261cf16227755d0d32a292b85ca11e", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `tag`
[INFO] [stderr]    --> src/tlv.rs:269:21
[INFO] [stderr]     |
[INFO] [stderr] 269 |                 let tag = Tag::from(*t);
[INFO] [stderr]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_tag`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `now`
[INFO] [stderr]    --> src/timer.rs:195:9
[INFO] [stderr]     |
[INFO] [stderr] 195 |     let now = time::Instant::now();
[INFO] [stderr]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_now`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/timer.rs:309:16
[INFO] [stderr]     |
[INFO] [stderr] 309 |             Ok(mut ok_data) => ok_data,
[INFO] [stderr]     |                ----^^^^^^^
[INFO] [stderr]     |                |
[INFO] [stderr]     |                help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/timer.rs:321:20
[INFO] [stderr]     |
[INFO] [stderr] 321 |                 Ok(mut ok_data) => ok_data,
[INFO] [stderr]     |                    ----^^^^^^^
[INFO] [stderr]     |                    |
[INFO] [stderr]     |                    help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/timer.rs:310:17
[INFO] [stderr]     |
[INFO] [stderr] 310 |             Err(err) => {
[INFO] [stderr]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/timer.rs:322:21
[INFO] [stderr]     |
[INFO] [stderr] 322 |                 Err(err) => {
[INFO] [stderr]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/timer.rs:338:17
[INFO] [stderr]     |
[INFO] [stderr] 338 |             Err(err) => return Err(Error::BadMessageTag),
[INFO] [stderr]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/timer.rs:351:17
[INFO] [stderr]     |
[INFO] [stderr] 351 |             Err(err) => {
[INFO] [stderr]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/timer.rs:377:17
[INFO] [stderr]     |
[INFO] [stderr] 377 |             Err(err) => {
[INFO] [stderr]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/timer.rs:403:13
[INFO] [stderr]     |
[INFO] [stderr] 403 |         Err(err) => {
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/timer.rs:425:21
[INFO] [stderr]     |
[INFO] [stderr] 425 |                 Err(err) => {
[INFO] [stderr]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/timer.rs:437:13
[INFO] [stderr]     |
[INFO] [stderr] 437 |         Err(err) => {
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/timer.rs:485:13
[INFO] [stderr]     |
[INFO] [stderr] 485 |         Err(err) => return Err(res.unwrap_err()),
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/timer.rs:489:13
[INFO] [stderr]     |
[INFO] [stderr] 489 |         Err(err) => {
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/timer.rs:496:13
[INFO] [stderr]     |
[INFO] [stderr] 496 |         Err(err) => {
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr] 
[INFO] [stderr] warning: method `read_arr` is never used
[INFO] [stderr]    --> src/tlv.rs:704:8
[INFO] [stderr]     |
[INFO] [stderr] 701 | impl<'a: 'b, 'b> TagParser<'a, 'b> {
[INFO] [stderr]     | ---------------------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 704 |     fn read_arr<T>(&mut self, out: &mut [T])
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rusty-but-fast` (lib) generated 16 warnings (run `cargo fix --lib -p rusty-but-fast` to apply 15 suggestions)
[INFO] [stderr] warning: `rusty-but-fast` (lib test) generated 15 warnings (15 duplicates)
[INFO] [stderr] warning: unused import: `std::io::ErrorKind::WouldBlock as ErrWouldBlock`
[INFO] [stderr]   --> src/bin/timer_server.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     use std::io::ErrorKind::WouldBlock as ErrWouldBlock;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rusty-but-fast` (bin "timer_server" test) generated 1 warning (run `cargo fix --bin "timer_server" -p rusty-but-fast --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/build/rusty-but-fast/9c41e4bc87dd7ecc/deps/rusty_but_fast-9c41e4bc87dd7ecc)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test tlv::test::encode_example ... ok
[INFO] [stdout] test tlv::test::encode_test ... ok
[INFO] [stdout] test tlv::test::buf2tag ... ok
[INFO] [stdout] test tlv::test::tag_eq ... ok
[INFO] [stdout] test tlv::test::try_from_example ... ok
[INFO] [stdout] test timer::test::spawn_timer ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/timer_client.rs (/opt/rustwide/target/debug/build/rusty-but-fast/88d70865bd0cc295/deps/timer_client-88d70865bd0cc295)
[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 unittests src/bin/timer_server.rs (/opt/rustwide/target/debug/build/rusty-but-fast/91bb5dda1996f677/deps/timer_server-91bb5dda1996f677)
[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" "a10ea33468ce353a831fd0f0cdac028362261cf16227755d0d32a292b85ca11e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a10ea33468ce353a831fd0f0cdac028362261cf16227755d0d32a292b85ca11e", kill_on_drop: false }`
[INFO] [stdout] a10ea33468ce353a831fd0f0cdac028362261cf16227755d0d32a292b85ca11e
