[INFO] cloning repository https://github.com/scripts-richard/A-a-Hot-Reloader
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/scripts-richard/A-a-Hot-Reloader" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscripts-richard%2FA-a-Hot-Reloader", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscripts-richard%2FA-a-Hot-Reloader'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6371c0219dd4e9f06abf032fd2cffad2f5dee67f
[INFO] testing scripts-richard/A-a-Hot-Reloader against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscripts-richard%2FA-a-Hot-Reloader" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/scripts-richard/A-a-Hot-Reloader on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/scripts-richard/A-a-Hot-Reloader
[INFO] finished tweaking git repo https://github.com/scripts-richard/A-a-Hot-Reloader
[INFO] tweaked toml for git repo https://github.com/scripts-richard/A-a-Hot-Reloader written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/scripts-richard/A-a-Hot-Reloader already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "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] 9814c4860ce94230622b8aa7b4125d3fbf78b6e538126b5bdf0cb37014a5d990
[INFO] running `Command { std: "docker" "start" "-a" "9814c4860ce94230622b8aa7b4125d3fbf78b6e538126b5bdf0cb37014a5d990", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9814c4860ce94230622b8aa7b4125d3fbf78b6e538126b5bdf0cb37014a5d990", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9814c4860ce94230622b8aa7b4125d3fbf78b6e538126b5bdf0cb37014a5d990", kill_on_drop: false }`
[INFO] [stdout] 9814c4860ce94230622b8aa7b4125d3fbf78b6e538126b5bdf0cb37014a5d990
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", 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] eb11caab8626441e81bd658c49b589b1fda4d24d294e0255ae7aab27c141d7a0
[INFO] running `Command { std: "docker" "start" "-a" "eb11caab8626441e81bd658c49b589b1fda4d24d294e0255ae7aab27c141d7a0", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling futures v0.1.27
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling slog v2.4.1
[INFO] [stderr]    Compiling same-file v1.0.4
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling crossbeam-utils v0.6.5
[INFO] [stderr]    Compiling tokio-trace-core v0.2.0
[INFO] [stderr]    Compiling owning_ref v0.4.0
[INFO] [stderr]    Compiling walkdir v2.2.8
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling inotify-sys v0.1.3
[INFO] [stderr]    Compiling isatty v0.1.9
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling lock_api v0.1.5
[INFO] [stderr]    Compiling ctrlc v3.1.2
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.1
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling slog-async v2.3.0
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling tokio-executor v0.1.7
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling tokio-sync v0.1.6
[INFO] [stderr]    Compiling tokio-threadpool v0.1.14
[INFO] [stderr]    Compiling tokio-timer v0.2.11
[INFO] [stderr]    Compiling tokio-current-thread v0.1.6
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling slog-term v2.4.0
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio v0.1.21
[INFO] [stderr]    Compiling inotify v0.7.0
[INFO] [stderr]    Compiling aa v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/watchers.rs:103:39
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub fn watch(&mut self) -> Result<(bool), io::Error> {
[INFO] [stdout]     |                                       ^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/watchers.rs:112:44
[INFO] [stdout]     |
[INFO] [stdout] 112 |     fn dir_event_loop(&mut self) -> Result<(bool), io::Error> {
[INFO] [stdout]     |                                            ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/watchers.rs:159:45
[INFO] [stdout]     |
[INFO] [stdout] 159 |     fn file_event_loop(&mut self) -> Result<(bool), io::Error> {
[INFO] [stdout]     |                                             ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 43.41s
[INFO] running `Command { std: "docker" "inspect" "eb11caab8626441e81bd658c49b589b1fda4d24d294e0255ae7aab27c141d7a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb11caab8626441e81bd658c49b589b1fda4d24d294e0255ae7aab27c141d7a0", kill_on_drop: false }`
[INFO] [stdout] eb11caab8626441e81bd658c49b589b1fda4d24d294e0255ae7aab27c141d7a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3455b53128f805e0b99761ed8ce67c855b6a84e823e156380aa8928bf09bec09
[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" "3455b53128f805e0b99761ed8ce67c855b6a84e823e156380aa8928bf09bec09", kill_on_drop: false }`
[INFO] [stderr]    Compiling aa v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/watchers.rs:103:39
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub fn watch(&mut self) -> Result<(bool), io::Error> {
[INFO] [stdout]     |                                       ^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/watchers.rs:112:44
[INFO] [stdout]     |
[INFO] [stdout] 112 |     fn dir_event_loop(&mut self) -> Result<(bool), io::Error> {
[INFO] [stdout]     |                                            ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/watchers.rs:159:45
[INFO] [stdout]     |
[INFO] [stdout] 159 |     fn file_event_loop(&mut self) -> Result<(bool), io::Error> {
[INFO] [stdout]     |                                             ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/watchers.rs:103:39
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub fn watch(&mut self) -> Result<(bool), io::Error> {
[INFO] [stdout]     |                                       ^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/watchers.rs:112:44
[INFO] [stdout]     |
[INFO] [stdout] 112 |     fn dir_event_loop(&mut self) -> Result<(bool), io::Error> {
[INFO] [stdout]     |                                            ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/watchers.rs:159:45
[INFO] [stdout]     |
[INFO] [stdout] 159 |     fn file_event_loop(&mut self) -> Result<(bool), io::Error> {
[INFO] [stdout]     |                                             ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.28s
[INFO] running `Command { std: "docker" "inspect" "3455b53128f805e0b99761ed8ce67c855b6a84e823e156380aa8928bf09bec09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3455b53128f805e0b99761ed8ce67c855b6a84e823e156380aa8928bf09bec09", kill_on_drop: false }`
[INFO] [stdout] 3455b53128f805e0b99761ed8ce67c855b6a84e823e156380aa8928bf09bec09
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a00168c12273ece31d6cddd39ea27ea9f56690cca19ac2e7c6bb0f09c3cb2c1c
[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" "a00168c12273ece31d6cddd39ea27ea9f56690cca19ac2e7c6bb0f09c3cb2c1c", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/watchers.rs:103:39
[INFO] [stderr]     |
[INFO] [stderr] 103 |     pub fn watch(&mut self) -> Result<(bool), io::Error> {
[INFO] [stderr]     |                                       ^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/watchers.rs:103:39
[INFO] [stderr]     |
[INFO] [stderr] 103 |     pub fn watch(&mut self) -> Result<(bool), io::Error> {
[INFO] [stderr]     |                                       ^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/watchers.rs:112:44
[INFO] [stderr]     |
[INFO] [stderr] 112 |     fn dir_event_loop(&mut self) -> Result<(bool), io::Error> {
[INFO] [stderr]     |                                            ^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/watchers.rs:159:45
[INFO] [stderr]     |
[INFO] [stderr] 159 |     fn file_event_loop(&mut self) -> Result<(bool), io::Error> {
[INFO] [stderr]     |                                             ^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/watchers.rs:112:44
[INFO] [stderr]     |
[INFO] [stderr] 112 |     fn dir_event_loop(&mut self) -> Result<(bool), io::Error> {
[INFO] [stderr]     |                                            ^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/watchers.rs:159:45
[INFO] [stderr]     |
[INFO] [stderr] 159 |     fn file_event_loop(&mut self) -> Result<(bool), io::Error> {
[INFO] [stderr]     |                                             ^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.16s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/aa-00fbff1fbdddf3b7
[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
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/aa-b8e04489f3d7d512
[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
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests aa
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/watchers.rs:103:39
[INFO] [stderr]     |
[INFO] [stderr] 103 |     pub fn watch(&mut self) -> Result<(bool), io::Error> {
[INFO] [stderr]     |                                       ^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/watchers.rs:112:44
[INFO] [stderr]     |
[INFO] [stderr] 112 |     fn dir_event_loop(&mut self) -> Result<(bool), io::Error> {
[INFO] [stderr]     |                                            ^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/watchers.rs:159:45
[INFO] [stderr]     |
[INFO] [stderr] 159 |     fn file_event_loop(&mut self) -> Result<(bool), io::Error> {
[INFO] [stderr]     |                                             ^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings 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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a00168c12273ece31d6cddd39ea27ea9f56690cca19ac2e7c6bb0f09c3cb2c1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a00168c12273ece31d6cddd39ea27ea9f56690cca19ac2e7c6bb0f09c3cb2c1c", kill_on_drop: false }`
[INFO] [stdout] a00168c12273ece31d6cddd39ea27ea9f56690cca19ac2e7c6bb0f09c3cb2c1c