[INFO] cloning repository https://github.com/vi/websocat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vi/websocat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvi%2Fwebsocat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvi%2Fwebsocat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 29c8c54d6f275519abc28f4cb90e1fa69e2fbcae
[INFO] checking vi/websocat against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvi%2Fwebsocat" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/vi/websocat
[INFO] finished tweaking git repo https://github.com/vi/websocat
[INFO] tweaked toml for git repo https://github.com/vi/websocat written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/vi/websocat on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/vi/websocat 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded websocket-base v0.26.5
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[INFO] [stderr]   Downloaded openssl-src v300.5.4+3.5.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 657de8c0c576916868a8cd4b6910acb63b54045e6fa95802fa6203c41083fdc4
[INFO] running `Command { std: "docker" "start" "-a" "657de8c0c576916868a8cd4b6910acb63b54045e6fa95802fa6203c41083fdc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "657de8c0c576916868a8cd4b6910acb63b54045e6fa95802fa6203c41083fdc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "657de8c0c576916868a8cd4b6910acb63b54045e6fa95802fa6203c41083fdc4", kill_on_drop: false }`
[INFO] [stdout] 657de8c0c576916868a8cd4b6910acb63b54045e6fa95802fa6203c41083fdc4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9dfe1726975fb08cde78faca343c2ab73e162f9aa3bac7b4c83ab78b2b136ec0
[INFO] running `Command { std: "docker" "start" "-a" "9dfe1726975fb08cde78faca343c2ab73e162f9aa3bac7b4c83ab78b2b136ec0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]    Compiling cc v1.0.90
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking bitflags v2.5.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]    Compiling unicode-segmentation v1.11.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling rustix v0.38.32
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking opaque-debug v0.2.3
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[INFO] [stderr]     Checking base64 v0.9.3
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[INFO] [stderr]     Checking sha-1 v0.8.2
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[INFO] [stderr]     Checking linux-raw-sys v0.4.13
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking traitobject v0.1.1
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]    Compiling syn v2.0.57
[INFO] [stderr]     Checking typeable v0.1.2
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking fastrand v2.0.2
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking slab_typesafe v0.1.3
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
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[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking anymap v0.12.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking crossbeam-deque v0.7.4
[INFO] [stderr]    Compiling openssl-sys v0.9.104
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking tokio-sync v0.1.8
[INFO] [stderr]    Compiling openssl v0.10.64
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]     Checking tokio-timer v0.2.13
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking hyper v0.10.16
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]     Checking tokio-stdin-stdout v0.1.5
[INFO] [stderr]     Checking readwrite v0.1.2
[INFO] [stderr]    Compiling structopt-derive v0.2.16
[INFO] [stderr]    Compiling smart-default v0.3.0
[INFO] [stderr]    Compiling derivative v1.0.4
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio-signal v0.2.9
[INFO] [stderr]     Checking tokio-file-unix v0.5.1
[INFO] [stderr]     Checking tokio-process v0.2.5
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking tk-listen v0.2.1
[INFO] [stderr]     Checking structopt v0.2.16
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]     Checking http-bytes v0.1.0
[INFO] [stderr]     Checking tokio-tls v0.2.1
[INFO] [stderr]     Checking websocket-base v0.26.5
[INFO] [stderr]     Checking websocket v0.27.1
[INFO] [stderr]     Checking websocat v1.14.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/foreachmsg_peer.rs:80:51
[INFO] [stdout]    |
[INFO] [stdout] 80 |     fn poll(&mut self) -> Poll<&mut Peer, Box<dyn (::std::error::Error)>> {
[INFO] [stdout]    |                                                   ^                   ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 80 -     fn poll(&mut self) -> Poll<&mut Peer, Box<dyn (::std::error::Error)>> {
[INFO] [stdout] 80 +     fn poll(&mut self) -> Poll<&mut Peer, Box<dyn ::std::error::Error >> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/reconnect_peer.rs:74:51
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn poll(&mut self) -> Poll<&mut Peer, Box<dyn (::std::error::Error)>> {
[INFO] [stdout]    |                                                   ^                   ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 74 -     fn poll(&mut self) -> Poll<&mut Peer, Box<dyn (::std::error::Error)>> {
[INFO] [stdout] 74 +     fn poll(&mut self) -> Poll<&mut Peer, Box<dyn ::std::error::Error >> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/socks5_peer.rs:99:68
[INFO] [stdout]    |
[INFO] [stdout] 99 |     Box<dyn Future<Item = (SocksSocketAddr, Peer), Error = Box<dyn (::std::error::Error)>>>;
[INFO] [stdout]    |                                                                    ^                   ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 99 -     Box<dyn Future<Item = (SocksSocketAddr, Peer), Error = Box<dyn (::std::error::Error)>>>;
[INFO] [stdout] 99 +     Box<dyn Future<Item = (SocksSocketAddr, Peer), Error = Box<dyn ::std::error::Error>>>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/ssl_peer.rs:26:28
[INFO] [stdout]    |
[INFO] [stdout] 26 |             let e: Box<dyn (::std::error::Error)> = e;
[INFO] [stdout]    |                            ^                   ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 26 -             let e: Box<dyn (::std::error::Error)> = e;
[INFO] [stdout] 26 +             let e: Box<dyn ::std::error::Error > = e;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/specparse.rs:63:24
[INFO] [stdout]    |
[INFO] [stdout] 63 |     type Err = Box<dyn (::std::error::Error)>;
[INFO] [stdout]    |                        ^                   ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 63 -     type Err = Box<dyn (::std::error::Error)>;
[INFO] [stdout] 63 +     type Err = Box<dyn ::std::error::Error >;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/foreachmsg_peer.rs:80:51
[INFO] [stdout]    |
[INFO] [stdout] 80 |     fn poll(&mut self) -> Poll<&mut Peer, Box<dyn (::std::error::Error)>> {
[INFO] [stdout]    |                                                   ^                   ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 80 -     fn poll(&mut self) -> Poll<&mut Peer, Box<dyn (::std::error::Error)>> {
[INFO] [stdout] 80 +     fn poll(&mut self) -> Poll<&mut Peer, Box<dyn ::std::error::Error >> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/reconnect_peer.rs:74:51
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn poll(&mut self) -> Poll<&mut Peer, Box<dyn (::std::error::Error)>> {
[INFO] [stdout]    |                                                   ^                   ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 74 -     fn poll(&mut self) -> Poll<&mut Peer, Box<dyn (::std::error::Error)>> {
[INFO] [stdout] 74 +     fn poll(&mut self) -> Poll<&mut Peer, Box<dyn ::std::error::Error >> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/socks5_peer.rs:99:68
[INFO] [stdout]    |
[INFO] [stdout] 99 |     Box<dyn Future<Item = (SocksSocketAddr, Peer), Error = Box<dyn (::std::error::Error)>>>;
[INFO] [stdout]    |                                                                    ^                   ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 99 -     Box<dyn Future<Item = (SocksSocketAddr, Peer), Error = Box<dyn (::std::error::Error)>>>;
[INFO] [stdout] 99 +     Box<dyn Future<Item = (SocksSocketAddr, Peer), Error = Box<dyn ::std::error::Error>>>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/ssl_peer.rs:26:28
[INFO] [stdout]    |
[INFO] [stdout] 26 |             let e: Box<dyn (::std::error::Error)> = e;
[INFO] [stdout]    |                            ^                   ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 26 -             let e: Box<dyn (::std::error::Error)> = e;
[INFO] [stdout] 26 +             let e: Box<dyn ::std::error::Error > = e;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/specparse.rs:63:24
[INFO] [stdout]    |
[INFO] [stdout] 63 |     type Err = Box<dyn (::std::error::Error)>;
[INFO] [stdout]    |                        ^                   ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 63 -     type Err = Box<dyn (::std::error::Error)>;
[INFO] [stdout] 63 +     type Err = Box<dyn ::std::error::Error >;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/specifier.rs:234:39
[INFO] [stdout]     |
[INFO] [stdout] 234 |     pub fn global<T:std::any::Any, F>(&self, def:F) -> std::cell::RefMut<T> 
[INFO] [stdout]     |                                       ^^^^^            ^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                       |
[INFO] [stdout]     |                                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 234 |     pub fn global<T:std::any::Any, F>(&self, def:F) -> std::cell::RefMut<'_, T> 
[INFO] [stdout]     |                                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/specifier.rs:234:39
[INFO] [stdout]     |
[INFO] [stdout] 234 |     pub fn global<T:std::any::Any, F>(&self, def:F) -> std::cell::RefMut<T> 
[INFO] [stdout]     |                                       ^^^^^            ^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                       |
[INFO] [stdout]     |                                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 234 |     pub fn global<T:std::any::Any, F>(&self, def:F) -> std::cell::RefMut<'_, T> 
[INFO] [stdout]     |                                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/main.rs:740:59
[INFO] [stdout]     |
[INFO] [stdout] 740 |     pub fn setup_env_logger(ll: u8) -> Result<(), Box<dyn (::std::error::Error)>> {
[INFO] [stdout]     |                                                           ^                   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 740 -     pub fn setup_env_logger(ll: u8) -> Result<(), Box<dyn (::std::error::Error)>> {
[INFO] [stdout] 740 +     pub fn setup_env_logger(ll: u8) -> Result<(), Box<dyn ::std::error::Error>> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/main.rs:740:59
[INFO] [stdout]     |
[INFO] [stdout] 740 |     pub fn setup_env_logger(ll: u8) -> Result<(), Box<dyn (::std::error::Error)>> {
[INFO] [stdout]     |                                                           ^                   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 740 -     pub fn setup_env_logger(ll: u8) -> Result<(), Box<dyn (::std::error::Error)>> {
[INFO] [stdout] 740 +     pub fn setup_env_logger(ll: u8) -> Result<(), Box<dyn ::std::error::Error>> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 26.90s
[INFO] running `Command { std: "docker" "inspect" "9dfe1726975fb08cde78faca343c2ab73e162f9aa3bac7b4c83ab78b2b136ec0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dfe1726975fb08cde78faca343c2ab73e162f9aa3bac7b4c83ab78b2b136ec0", kill_on_drop: false }`
[INFO] [stdout] 9dfe1726975fb08cde78faca343c2ab73e162f9aa3bac7b4c83ab78b2b136ec0
