[INFO] cloning repository https://github.com/richcallow/rradio_lcd_driver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/richcallow/rradio_lcd_driver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichcallow%2Frradio_lcd_driver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichcallow%2Frradio_lcd_driver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e453ae68a80527e2ad77b984435a5ec7a3ff485b
[INFO] checking richcallow/rradio_lcd_driver against master#0dce3f606e05cffab7361c132a399d3550ab0df8 for pr-78376
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichcallow%2Frradio_lcd_driver" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/richcallow/rradio_lcd_driver on toolchain 0dce3f606e05cffab7361c132a399d3550ab0df8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/richcallow/rradio_lcd_driver
[INFO] finished tweaking git repo https://github.com/richcallow/rradio_lcd_driver
[INFO] tweaked toml for git repo https://github.com/richcallow/rradio_lcd_driver written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/richcallow/rradio_lcd_driver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "fetch" "--locked" "--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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a43a792b766e197bd9b7f31c5b809c68517f8c9e94e0c073781e63d079b2dd45
[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" "a43a792b766e197bd9b7f31c5b809c68517f8c9e94e0c073781e63d079b2dd45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a43a792b766e197bd9b7f31c5b809c68517f8c9e94e0c073781e63d079b2dd45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a43a792b766e197bd9b7f31c5b809c68517f8c9e94e0c073781e63d079b2dd45", kill_on_drop: false }`
[INFO] [stdout] a43a792b766e197bd9b7f31c5b809c68517f8c9e94e0c073781e63d079b2dd45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3effca7e8a1e719e2eb6e1180a10dcdb641bf261cfe9b172a9ba09329b4f6a70
[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" "3effca7e8a1e719e2eb6e1180a10dcdb641bf261cfe9b172a9ba09329b4f6a70", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.46
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling anyhow v1.0.33
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking unidecode v0.3.0
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]     Checking pnet_sys v0.26.0
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]     Checking clerk v0.4.0
[INFO] [stderr]    Compiling aho-corasick v0.7.14
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling regex v1.4.1
[INFO] [stderr]     Checking rmp v0.8.9
[INFO] [stderr]    Compiling syntex_pos v0.42.0
[INFO] [stderr]    Compiling syntex_errors v0.42.0
[INFO] [stderr]    Compiling syntex_syntax v0.42.0
[INFO] [stderr]     Checking gpio-cdev v0.4.0
[INFO] [stderr]     Checking serde v1.0.117
[INFO] [stderr]    Compiling syntex v0.42.2
[INFO] [stderr]    Compiling pnet_macros v0.26.0
[INFO] [stderr]     Checking ipnetwork v0.16.0
[INFO] [stderr]     Checking toml v0.5.7
[INFO] [stderr]     Checking rradio-messages v0.6.0 (https://github.com/sammhicks/internet-radio-rs#836a63ee)
[INFO] [stderr]     Checking rmp-serde v0.14.4
[INFO] [stderr]     Checking pnet_datalink v0.26.0
[INFO] [stderr]    Compiling pnet_packet v0.26.0
[INFO] [stderr]     Checking pnet_transport v0.26.0
[INFO] [stderr]     Checking pnet v0.26.0
[INFO] [stderr]     Checking rradio_lcd_driver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `pipe_line_state` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let mut pipe_line_state: PipelineState = PipelineState::VoidPending;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_pipe_line_state` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `volume` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let mut volume: i32 = -1;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_volume` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current_track_index` is never read
[INFO] [stdout]   --> src/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let mut current_track_index: usize = 0;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `pipe_line_state` is never read
[INFO] [stdout]   --> src/main.rs:77:21
[INFO] [stdout]    |
[INFO] [stdout] 77 |                     pipe_line_state = pipeline_state;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `volume` is never read
[INFO] [stdout]   --> src/main.rs:92:21
[INFO] [stdout]    |
[INFO] [stdout] 92 |                     volume = volume_in;
[INFO] [stdout]    |                     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_utf8`
[INFO] [stdout]   --> src/lcd_screen/mod.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn write_utf8(&mut self, line: LCDLineNumbers, position: u8, string: String) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_line`
[INFO] [stdout]    --> src/lcd_screen/mod.rs:124:12
[INFO] [stdout]     |
[INFO] [stdout] 124 |     pub fn write_line(&mut self, line: LCDLineNumbers, length: usize, string: String) {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_volume`
[INFO] [stdout]    --> src/main.rs:120:8
[INFO] [stdout]     |
[INFO] [stdout] 120 |     fn print_volume(pipe_line_state: PipelineState, volume: i32, mut lcd: lcd_screen::LcdScreen) {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `pipe_line_state` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let mut pipe_line_state: PipelineState = PipelineState::VoidPending;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_pipe_line_state` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `volume` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let mut volume: i32 = -1;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_volume` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current_track_index` is never read
[INFO] [stdout]   --> src/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let mut current_track_index: usize = 0;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `pipe_line_state` is never read
[INFO] [stdout]   --> src/main.rs:77:21
[INFO] [stdout]    |
[INFO] [stdout] 77 |                     pipe_line_state = pipeline_state;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `volume` is never read
[INFO] [stdout]   --> src/main.rs:92:21
[INFO] [stdout]    |
[INFO] [stdout] 92 |                     volume = volume_in;
[INFO] [stdout]    |                     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_utf8`
[INFO] [stdout]   --> src/lcd_screen/mod.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn write_utf8(&mut self, line: LCDLineNumbers, position: u8, string: String) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_line`
[INFO] [stdout]    --> src/lcd_screen/mod.rs:124:12
[INFO] [stdout]     |
[INFO] [stdout] 124 |     pub fn write_line(&mut self, line: LCDLineNumbers, length: usize, string: String) {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 55s
[INFO] running `Command { std: "docker" "inspect" "3effca7e8a1e719e2eb6e1180a10dcdb641bf261cfe9b172a9ba09329b4f6a70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3effca7e8a1e719e2eb6e1180a10dcdb641bf261cfe9b172a9ba09329b4f6a70", kill_on_drop: false }`
[INFO] [stdout] 3effca7e8a1e719e2eb6e1180a10dcdb641bf261cfe9b172a9ba09329b4f6a70