[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] 8b70f4c1627ff0db1393134414b05fc3bde08e94
[INFO] checking richcallow/rradio_lcd_driver against master#b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 for pr-79470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichcallow%2Frradio_lcd_driver" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/richcallow/rradio_lcd_driver on toolchain b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "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-4/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" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 91a9a1a49ef31540825d7948c1980ea08c38ecf519fbbe5897bc09df719fa7cc
[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" "91a9a1a49ef31540825d7948c1980ea08c38ecf519fbbe5897bc09df719fa7cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "91a9a1a49ef31540825d7948c1980ea08c38ecf519fbbe5897bc09df719fa7cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91a9a1a49ef31540825d7948c1980ea08c38ecf519fbbe5897bc09df719fa7cc", kill_on_drop: false }`
[INFO] [stdout] 91a9a1a49ef31540825d7948c1980ea08c38ecf519fbbe5897bc09df719fa7cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac1b0553f6dbc7f386db295da58e6e85c5fb35b038283d0d4ef9f71de4ab7b8e
[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" "ac1b0553f6dbc7f386db295da58e6e85c5fb35b038283d0d4ef9f71de4ab7b8e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.52
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking futures-core v0.3.8
[INFO] [stderr]    Compiling unicode-xid v0.0.3
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]     Checking pin-project-lite v0.1.11
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking unidecode v0.3.0
[INFO] [stderr]     Checking async-lock v2.3.0
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking futures-lite v1.11.2
[INFO] [stderr]     Checking async-channel v1.5.1
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking clerk v0.4.0
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking nb-connect v1.0.2
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking pnet_sys v0.26.0
[INFO] [stderr]     Checking signal-hook-registry v1.2.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking async-io v1.2.0
[INFO] [stderr]     Checking signal-hook v0.1.16
[INFO] [stderr]     Checking async-fs v1.5.0
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking async-process v1.0.1
[INFO] [stderr]     Checking async-net v1.5.0
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]     Checking rmp v0.8.9
[INFO] [stderr]    Compiling syntex_pos v0.42.0
[INFO] [stderr]     Checking smol v1.2.4
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]    Compiling syntex_errors v0.42.0
[INFO] [stderr]    Compiling syntex_syntax v0.42.0
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]     Checking gpio-cdev v0.4.0
[INFO] [stderr]     Checking thiserror v1.0.22
[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 rmp-serde v0.14.4
[INFO] [stderr]     Checking toml v0.5.7
[INFO] [stderr]     Checking rradio-messages v0.8.0 (https://github.com/sammhicks/internet-radio-rs#af0e1628)
[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 `got_error` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut got_error = false;
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_got_error` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `got_error` is never read
[INFO] [stdout]    --> src/main.rs:172:25
[INFO] [stdout]     |
[INFO] [stdout] 172 |                         got_error = true;
[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 `got_error` is never read
[INFO] [stdout]    --> src/main.rs:238:21
[INFO] [stdout]     |
[INFO] [stdout] 238 |                     got_error = false;
[INFO] [stdout]     |                     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `track_index_digit_count`
[INFO] [stdout]    --> src/main.rs:405:45
[INFO] [stdout]     |
[INFO] [stdout] 405 | ...                   let track_index_digit_count =
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_track_index_digit_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `position_secs_digit_count`
[INFO] [stdout]    --> src/main.rs:408:45
[INFO] [stdout]     |
[INFO] [stdout] 408 | ...                   let position_secs_digit_count = match position_secs {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_position_secs_digit_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration_secs_digit_count`
[INFO] [stdout]    --> src/main.rs:415:45
[INFO] [stdout]     |
[INFO] [stdout] 415 | ...                   let duration_secs_digit_count = match duration_secs {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration_secs_digit_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `got_error` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut got_error = false;
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_got_error` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `got_error` is never read
[INFO] [stdout]    --> src/main.rs:172:25
[INFO] [stdout]     |
[INFO] [stdout] 172 |                         got_error = true;
[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 `got_error` is never read
[INFO] [stdout]    --> src/main.rs:238:21
[INFO] [stdout]     |
[INFO] [stdout] 238 |                     got_error = false;
[INFO] [stdout]     |                     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `track_index_digit_count`
[INFO] [stdout]    --> src/main.rs:405:45
[INFO] [stdout]     |
[INFO] [stdout] 405 | ...                   let track_index_digit_count =
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_track_index_digit_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `position_secs_digit_count`
[INFO] [stdout]    --> src/main.rs:408:45
[INFO] [stdout]     |
[INFO] [stdout] 408 | ...                   let position_secs_digit_count = match position_secs {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_position_secs_digit_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration_secs_digit_count`
[INFO] [stdout]    --> src/main.rs:415:45
[INFO] [stdout]     |
[INFO] [stdout] 415 | ...                   let duration_secs_digit_count = match duration_secs {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration_secs_digit_count`
[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 2m 07s
[INFO] running `Command { std: "docker" "inspect" "ac1b0553f6dbc7f386db295da58e6e85c5fb35b038283d0d4ef9f71de4ab7b8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac1b0553f6dbc7f386db295da58e6e85c5fb35b038283d0d4ef9f71de4ab7b8e", kill_on_drop: false }`
[INFO] [stdout] ac1b0553f6dbc7f386db295da58e6e85c5fb35b038283d0d4ef9f71de4ab7b8e