[INFO] cloning repository https://github.com/mpsnp/niim_cups
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mpsnp/niim_cups" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpsnp%2Fniim_cups", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpsnp%2Fniim_cups'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bd4cfacbf25f7a4f5c664a4613eac4129f7e91ca
[INFO] checking mpsnp/niim_cups against eca445e5ae4a6679cc27d3a09106ce245e13a5a6 for pr-162478
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpsnp%2Fniim_cups" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mpsnp/niim_cups
[INFO] finished tweaking git repo https://github.com/mpsnp/niim_cups
[INFO] tweaked toml for git repo https://github.com/mpsnp/niim_cups written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mpsnp/niim_cups on toolchain eca445e5ae4a6679cc27d3a09106ce245e13a5a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mpsnp/niim_cups 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" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: binary `niim_cups` should have a kebab-case name
[INFO] [stderr]    |
[INFO] [stderr]  1 | /workspace/builds/worker-7-tc1/source/target/.../niim_cups
[INFO] [stderr]    |                                                  ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::non_kebab_case_bins` is set to `warn` by default
[INFO] [stderr] help: to change the binary name to `niim-cups`, convert `package.name`
[INFO] [stderr]   --> Cargo.toml:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 - name = "niim_cups"
[INFO] [stderr] 12 + name = "niim-cups"
[INFO] [stderr]    |
[INFO] [stderr] help: to change the binary name to `niim-cups`, specify `bin.name`
[INFO] [stderr]   --> Cargo.toml:13:19
[INFO] [stderr]    |
[INFO] [stderr] 13 ~ version = "0.1.0"
[INFO] [stderr] 14 + [[bin]]
[INFO] [stderr] 15 + name = "niim-cups"
[INFO] [stderr] 16 + path = "src/main.rs"
[INFO] [stderr]    |
[INFO] [stderr] warning: `niim_cups` (manifest) generated 1 warning
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serialport v4.7.2
[INFO] [stderr]   Downloaded objc2-core-bluetooth v0.2.2
[INFO] [stderr]   Downloaded unescaper v0.1.6
[INFO] [stderr]   Downloaded bluez-generated v0.4.0
[INFO] [stderr]   Downloaded dbus-tokio v0.7.6
[INFO] [stderr]   Downloaded bluez-async v0.8.2
[INFO] [stderr]   Downloaded io-uring v0.7.9
[INFO] [stderr]   Downloaded jni-utils v0.1.1
[INFO] [stderr]   Downloaded dbus v0.9.7
[INFO] [stderr]   Downloaded serde-xml-rs v0.8.1
[INFO] [stderr]   Downloaded btleplug v0.11.8
[INFO] [stderr]   Downloaded libdbus-sys v0.2.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 2164150d2573dbe08c3a9a7c5069d0b13d956300a25499e594076ab4fd2f218f
[INFO] running `Command { std: "docker" "start" "2164150d2573dbe08c3a9a7c5069d0b13d956300a25499e594076ab4fd2f218f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2164150d2573dbe08c3a9a7c5069d0b13d956300a25499e594076ab4fd2f218f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "2164150d2573dbe08c3a9a7c5069d0b13d956300a25499e594076ab4fd2f218f" "/opt/rustwide/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2164150d2573dbe08c3a9a7c5069d0b13d956300a25499e594076ab4fd2f218f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "2164150d2573dbe08c3a9a7c5069d0b13d956300a25499e594076ab4fd2f218f" "/opt/rustwide/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: binary `niim_cups` should have a kebab-case name
[INFO] [stderr]    |
[INFO] [stderr]  1 | /opt/rustwide/target/.../niim_cups
[INFO] [stderr]    |                          ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::non_kebab_case_bins` is set to `warn` by default
[INFO] [stderr] help: to change the binary name to `niim-cups`, convert `package.name`
[INFO] [stderr]   --> Cargo.toml:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 - name = "niim_cups"
[INFO] [stderr] 12 + name = "niim-cups"
[INFO] [stderr]    |
[INFO] [stderr] help: to change the binary name to `niim-cups`, specify `bin.name`
[INFO] [stderr]   --> Cargo.toml:13:19
[INFO] [stderr]    |
[INFO] [stderr] 13 ~ version = "0.1.0"
[INFO] [stderr] 14 + [[bin]]
[INFO] [stderr] 15 + name = "niim-cups"
[INFO] [stderr] 16 + path = "src/main.rs"
[INFO] [stderr]    |
[INFO] [stderr] warning: `niim_cups` (manifest) generated 1 warning
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]     Checking cfg-if v1.0.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]     Checking memchr v2.7.5
[INFO] [stderr]     Checking slab v0.4.10
[INFO] [stderr]    Compiling lock_api v0.4.13
[INFO] [stderr]    Compiling libdbus-sys v0.2.5
[INFO] [stderr]     Checking bytes v1.10.1
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling thiserror v2.0.12
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]     Checking bitflags v2.9.1
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]     Checking xml-rs v0.8.27
[INFO] [stderr]     Checking log v0.4.27
[INFO] [stderr]     Checking uuid v1.17.0
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]     Checking mio v1.0.4
[INFO] [stderr]     Checking signal-hook-registry v1.4.5
[INFO] [stderr]     Checking socket2 v0.5.10
[INFO] [stderr]     Checking nix v0.26.4
[INFO] [stderr]     Checking libudev v0.3.0
[INFO] [stderr]     Checking parking_lot v0.12.4
[INFO] [stderr]     Checking dashmap v6.1.0
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling thiserror-impl v2.0.12
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling async-trait v0.1.88
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking tokio v1.46.1
[INFO] [stderr]     Checking thiserror v1.0.69
[INFO] [stderr]     Checking unescaper v0.1.6
[INFO] [stderr]     Checking serialport v4.7.2
[INFO] [stderr]     Checking dbus v0.9.7
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking bluez-generated v0.4.0
[INFO] [stderr]     Checking dbus-tokio v0.7.6
[INFO] [stderr]     Checking tokio-util v0.7.15
[INFO] [stderr]     Checking tokio-stream v0.1.17
[INFO] [stderr]     Checking serde-xml-rs v0.8.1
[INFO] [stderr]     Checking bluez-async v0.8.2
[INFO] [stderr]     Checking btleplug v0.11.8
[INFO] [stderr]     Checking niim_cups v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `BluetoothTransport` is never constructed
[INFO] [stdout]   --> src/transport.rs:82:12
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub struct BluetoothTransport {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `new` and `new_sync` are never used
[INFO] [stdout]    --> src/transport.rs:89:18
[INFO] [stdout]     |
[INFO] [stdout]  88 | impl BluetoothTransport {
[INFO] [stdout]     | ----------------------- associated functions in this implementation
[INFO] [stdout]  89 |     pub async fn new(address: String) -> Result<Self, Box<dyn std::error::Error>> {
[INFO] [stdout]     |                  ^^^
[INFO] [stdout] ...
[INFO] [stdout] 142 |     pub fn new_sync(address: String) -> Result<Self, Box<dyn std::error::Error>> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `LanguageType` and `AutoShutdownTime` are never constructed
[INFO] [stdout]  --> src/enums.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum InfoEnum {
[INFO] [stdout]   |          -------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 7 |     LanguageType = 6,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 8 |     AutoShutdownTime = 7,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `InfoEnum` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_u8` is never used
[INFO] [stdout]   --> src/enums.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl InfoEnum {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 17 |     pub fn from_u8(value: u8) -> Option<Self> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/enums.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub enum RequestCodeEnum {
[INFO] [stdout]    |          --------------- variants in this enum
[INFO] [stdout] 41 |     GetInfo = 64,          // 0x40
[INFO] [stdout] 42 |     GetRfid = 26,          // 0x1A
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 43 |     Heartbeat = 220,       // 0xDC
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 44 |     SetLabelType = 35,     // 0x23
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 45 |     SetLabelDensity = 33,  // 0x21
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 46 |     StartPrint = 1,        // 0x01
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 47 |     EndPrint = 243,        // 0xF3
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 48 |     StartPagePrint = 3,    // 0x03
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 49 |     EndPagePrint = 227,    // 0xE3
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 50 |     AllowPrintClear = 32,  // 0x20
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 51 |     SetDimension = 19,     // 0x13
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 52 |     SetQuantity = 21,      // 0x15
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 53 |     GetPrintStatus = 163,  // 0xA3
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RequestCodeEnum` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_u8` is never used
[INFO] [stdout]   --> src/enums.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl RequestCodeEnum {
[INFO] [stdout]    | -------------------- associated function in this implementation
[INFO] [stdout] 57 |     pub fn from_u8(value: u8) -> Option<Self> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `heartbeat` is never used
[INFO] [stdout]    --> src/printer.rs:114:12
[INFO] [stdout]     |
[INFO] [stdout]  12 | impl<T: Transport> PrinterClient<T> {
[INFO] [stdout]     | ----------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 114 |     pub fn heartbeat(&mut self) -> Result<Option<HeartbeatResponse>, Box<dyn std::error::Error>> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HeartbeatResponse` is never constructed
[INFO] [stdout]    --> src/printer.rs:159:12
[INFO] [stdout]     |
[INFO] [stdout] 159 | pub struct HeartbeatResponse {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `is_paper_loaded`, `is_cover_closed`, and `get_power_level` are never used
[INFO] [stdout]    --> src/printer.rs:167:12
[INFO] [stdout]     |
[INFO] [stdout] 166 | impl HeartbeatResponse {
[INFO] [stdout]     | ---------------------- methods in this implementation
[INFO] [stdout] 167 |     pub fn is_paper_loaded(&self) -> Option<bool> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 171 |     pub fn is_cover_closed(&self) -> Option<bool> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 175 |     pub fn get_power_level(&self) -> Option<u8> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BluetoothTransport` is never constructed
[INFO] [stdout]   --> src/transport.rs:82:12
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub struct BluetoothTransport {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `new` and `new_sync` are never used
[INFO] [stdout]    --> src/transport.rs:89:18
[INFO] [stdout]     |
[INFO] [stdout]  88 | impl BluetoothTransport {
[INFO] [stdout]     | ----------------------- associated functions in this implementation
[INFO] [stdout]  89 |     pub async fn new(address: String) -> Result<Self, Box<dyn std::error::Error>> {
[INFO] [stdout]     |                  ^^^
[INFO] [stdout] ...
[INFO] [stdout] 142 |     pub fn new_sync(address: String) -> Result<Self, Box<dyn std::error::Error>> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `LanguageType` and `AutoShutdownTime` are never constructed
[INFO] [stdout]  --> src/enums.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum InfoEnum {
[INFO] [stdout]   |          -------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 7 |     LanguageType = 6,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 8 |     AutoShutdownTime = 7,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `InfoEnum` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_u8` is never used
[INFO] [stdout]   --> src/enums.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl InfoEnum {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 17 |     pub fn from_u8(value: u8) -> Option<Self> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/enums.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub enum RequestCodeEnum {
[INFO] [stdout]    |          --------------- variants in this enum
[INFO] [stdout] 41 |     GetInfo = 64,          // 0x40
[INFO] [stdout] 42 |     GetRfid = 26,          // 0x1A
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 43 |     Heartbeat = 220,       // 0xDC
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 44 |     SetLabelType = 35,     // 0x23
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 45 |     SetLabelDensity = 33,  // 0x21
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 46 |     StartPrint = 1,        // 0x01
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 47 |     EndPrint = 243,        // 0xF3
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 48 |     StartPagePrint = 3,    // 0x03
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 49 |     EndPagePrint = 227,    // 0xE3
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 50 |     AllowPrintClear = 32,  // 0x20
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 51 |     SetDimension = 19,     // 0x13
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 52 |     SetQuantity = 21,      // 0x15
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 53 |     GetPrintStatus = 163,  // 0xA3
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RequestCodeEnum` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_u8` is never used
[INFO] [stdout]   --> src/enums.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl RequestCodeEnum {
[INFO] [stdout]    | -------------------- associated function in this implementation
[INFO] [stdout] 57 |     pub fn from_u8(value: u8) -> Option<Self> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `heartbeat` is never used
[INFO] [stdout]    --> src/printer.rs:114:12
[INFO] [stdout]     |
[INFO] [stdout]  12 | impl<T: Transport> PrinterClient<T> {
[INFO] [stdout]     | ----------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 114 |     pub fn heartbeat(&mut self) -> Result<Option<HeartbeatResponse>, Box<dyn std::error::Error>> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HeartbeatResponse` is never constructed
[INFO] [stdout]    --> src/printer.rs:159:12
[INFO] [stdout]     |
[INFO] [stdout] 159 | pub struct HeartbeatResponse {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `is_paper_loaded`, `is_cover_closed`, and `get_power_level` are never used
[INFO] [stdout]    --> src/printer.rs:167:12
[INFO] [stdout]     |
[INFO] [stdout] 166 | impl HeartbeatResponse {
[INFO] [stdout]     | ---------------------- methods in this implementation
[INFO] [stdout] 167 |     pub fn is_paper_loaded(&self) -> Option<bool> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 171 |     pub fn is_cover_closed(&self) -> Option<bool> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 175 |     pub fn get_power_level(&self) -> Option<u8> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.78s
[INFO] running `Command { std: "docker" "inspect" "2164150d2573dbe08c3a9a7c5069d0b13d956300a25499e594076ab4fd2f218f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2164150d2573dbe08c3a9a7c5069d0b13d956300a25499e594076ab4fd2f218f", kill_on_drop: false }`
[INFO] [stdout] 2164150d2573dbe08c3a9a7c5069d0b13d956300a25499e594076ab4fd2f218f
