[INFO] cloning repository https://github.com/abgeana/vroom-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/abgeana/vroom-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabgeana%2Fvroom-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabgeana%2Fvroom-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fe20a0f1d81bc7945c07488dfe2f97acf2a36b0e
[INFO] checking abgeana/vroom-rs against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabgeana%2Fvroom-rs" "/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/abgeana/vroom-rs on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/abgeana/vroom-rs
[INFO] finished tweaking git repo https://github.com/abgeana/vroom-rs
[INFO] tweaked toml for git repo https://github.com/abgeana/vroom-rs written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/abgeana/vroom-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasmer_enumset_derive v0.5.0
[INFO] [stderr]   Downloaded enum-map v0.6.4
[INFO] [stderr]   Downloaded spidev v0.4.1
[INFO] [stderr]   Downloaded enum-map-derive v0.4.6
[INFO] [stderr]   Downloaded array-macro v1.0.5
[INFO] [stderr]   Downloaded cursive_core v0.2.2
[INFO] [stderr]   Downloaded wasmer_enumset v1.0.1
[INFO] [stderr]   Downloaded pwm-pca9685 v0.3.0
[INFO] [stderr]   Downloaded cursive v0.16.3
[INFO] [stderr]   Downloaded i2cdev v0.4.4
[INFO] [stderr]   Downloaded simplelog v0.10.0
[INFO] [stderr]   Downloaded linux-embedded-hal v0.3.0
[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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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] dff23dd2a6129e35f3bcc3fa85b2d3b5da6da138c3fe0a562695696afcbe444c
[INFO] running `Command { std: "docker" "start" "-a" "dff23dd2a6129e35f3bcc3fa85b2d3b5da6da138c3fe0a562695696afcbe444c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dff23dd2a6129e35f3bcc3fa85b2d3b5da6da138c3fe0a562695696afcbe444c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dff23dd2a6129e35f3bcc3fa85b2d3b5da6da138c3fe0a562695696afcbe444c", kill_on_drop: false }`
[INFO] [stdout] dff23dd2a6129e35f3bcc3fa85b2d3b5da6da138c3fe0a562695696afcbe444c
[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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ee394b16e68b7c532cc31dbcadf9a89e69592673ada7ad045a4adc32483f81d
[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" "4ee394b16e68b7c532cc31dbcadf9a89e69592673ada7ad045a4adc32483f81d", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr] note: Switching to Edition 2021 will enable the use of the version 2 feature resolver in Cargo.
[INFO] [stderr] This may cause some dependencies to be built with fewer features enabled than previously.
[INFO] [stderr] More information about the resolver changes may be found at https://doc.rust-lang.org/nightly/edition-guide/rust-2021/default-cargo-resolver.html
[INFO] [stderr] When building the following dependencies, the given features will no longer be used:
[INFO] [stderr] 
[INFO] [stderr]   proc-macro2 v1.0.27: default
[INFO] [stderr]   quote v1.0.9: default
[INFO] [stderr]   syn v1.0.73: extra-traits, full
[INFO] [stderr] 
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling cc v1.0.68
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking unicode-segmentation v1.7.1
[INFO] [stderr]     Checking xi-unicode v0.3.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]     Checking crossbeam-utils v0.8.5
[INFO] [stderr]     Checking embedded-hal v0.2.5
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking ioctl-rs v0.1.6
[INFO] [stderr]     Checking termios v0.2.2
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking serial-core v0.4.0
[INFO] [stderr]     Checking term_size v0.3.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking pwm-pca9685 v0.3.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking signal-hook v0.3.9
[INFO] [stderr]     Checking serial-unix v0.4.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling ahash v0.6.3
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]    Compiling ncurses v5.101.0
[INFO] [stderr]     Checking syn v1.0.73
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]     Checking num v0.3.1
[INFO] [stderr]    Compiling cast v0.2.6
[INFO] [stderr]     Checking sysfs_gpio v0.5.4
[INFO] [stderr]     Checking spidev v0.4.1
[INFO] [stderr]     Checking i2cdev v0.4.4
[INFO] [stderr]     Checking simplelog v0.10.0
[INFO] [stderr]     Checking linux-embedded-hal v0.3.0
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling enum-map-derive v0.4.6
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]     Checking enum-map v0.6.4
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling wasmer_enumset_derive v0.5.0
[INFO] [stderr]     Checking wasmer_enumset v1.0.1
[INFO] [stderr]     Checking cursive_core v0.2.2
[INFO] [stderr]     Checking cursive v0.16.3
[INFO] [stderr]     Checking vroom-rs v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/servo/mod.rs (1 fix)
[INFO] [stderr]        Fixed src/control.rs (1 fix)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pwm0.set_frequency(60);
[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: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pwm1.set_frequency(60);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     servo0.turn_neutral();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     servo1.turn_neutral();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         servo0.turn_angle(angle);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         servo1.turn_angle(angle);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pwm0.set_frequency(60);
[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: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pwm1.set_frequency(60);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     servo0.turn_neutral();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     servo1.turn_neutral();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         servo0.turn_angle(angle);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         servo1.turn_angle(angle);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 37.19s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking proc-macro2 v1.0.27
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking syn v1.0.73
[INFO] [stderr]     Checking cursive_core v0.2.2
[INFO] [stderr]     Checking cursive v0.16.3
[INFO] [stderr]     Checking vroom-rs v0.1.0 (/tmp/fixit)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pwm0.set_frequency(60);
[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: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pwm1.set_frequency(60);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     servo0.turn_neutral();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     servo1.turn_neutral();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         servo0.turn_angle(angle);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         servo1.turn_angle(angle);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pwm0.set_frequency(60);
[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: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pwm1.set_frequency(60);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     servo0.turn_neutral();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     servo1.turn_neutral();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         servo0.turn_angle(angle);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/control.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         servo1.turn_angle(angle);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.80s
[INFO] running `Command { std: "docker" "inspect" "4ee394b16e68b7c532cc31dbcadf9a89e69592673ada7ad045a4adc32483f81d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ee394b16e68b7c532cc31dbcadf9a89e69592673ada7ad045a4adc32483f81d", kill_on_drop: false }`
[INFO] [stdout] 4ee394b16e68b7c532cc31dbcadf9a89e69592673ada7ad045a4adc32483f81d