[INFO] cloning repository https://github.com/etrombly/serial_mon
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/etrombly/serial_mon" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fetrombly%2Fserial_mon", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fetrombly%2Fserial_mon'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e898456846aeb70f8ff1dddb2f4fd7714f5d0ec4
[INFO] checking etrombly/serial_mon against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fetrombly%2Fserial_mon" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/etrombly/serial_mon on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/etrombly/serial_mon
[INFO] finished tweaking git repo https://github.com/etrombly/serial_mon
[INFO] tweaked toml for git repo https://github.com/etrombly/serial_mon written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/etrombly/serial_mon already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cassowary v0.3.0
[INFO] [stderr]   Downloaded unicode-segmentation v1.2.1
[INFO] [stderr]   Downloaded itertools v0.8.0
[INFO] [stderr]   Downloaded tui v0.5.1
[INFO] [stderr]   Downloaded syn v0.15.31
[INFO] [stderr]   Downloaded cobs v0.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d240e508c75f4ab589385e9b7becd9f8faf935ce76b01f87caac5c1db3d661e
[INFO] running `Command { std: "docker" "start" "-a" "0d240e508c75f4ab589385e9b7becd9f8faf935ce76b01f87caac5c1db3d661e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d240e508c75f4ab589385e9b7becd9f8faf935ce76b01f87caac5c1db3d661e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d240e508c75f4ab589385e9b7becd9f8faf935ce76b01f87caac5c1db3d661e", kill_on_drop: false }`
[INFO] [stdout] 0d240e508c75f4ab589385e9b7becd9f8faf935ce76b01f87caac5c1db3d661e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5748c859da92a8a7299c2a78b5d97768df0067f2be60fbd50f403cfcfc065d38
[INFO] running `Command { std: "docker" "start" "-a" "5748c859da92a8a7299c2a78b5d97768df0067f2be60fbd50f403cfcfc065d38", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling cc v1.0.35
[INFO] [stderr]    Compiling syn v0.15.31
[INFO] [stderr]     Checking cfg-if v0.1.7
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]     Checking rustc-demangle v0.1.14
[INFO] [stderr]     Checking cassowary v0.3.0
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking unicode-segmentation v1.2.1
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking cobs v0.1.4
[INFO] [stderr]    Compiling backtrace v0.3.15
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]     Checking termios v0.2.2
[INFO] [stderr]     Checking ioctl-rs v0.1.6
[INFO] [stderr]     Checking serial-core v0.4.0
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]     Checking serial-unix v0.4.0
[INFO] [stderr]     Checking serial v0.4.0
[INFO] [stderr]     Checking tui v0.5.1
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking serial_mon v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `sync::mpsc`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     sync::mpsc,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sync::mpsc`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     sync::mpsc,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `termion::input::TermRead`
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use termion::input::TermRead;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `termion::input::TermRead`
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use termion::input::TermRead;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Rect`
[INFO] [stdout]   --> src/main.rs:17:61
[INFO] [stdout]    |
[INFO] [stdout] 17 | use tui::layout::{Alignment, Constraint, Direction, Layout, Rect};
[INFO] [stdout]    |                                                             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Rect`
[INFO] [stdout]   --> src/main.rs:17:61
[INFO] [stdout]    |
[INFO] [stdout] 17 | use tui::layout::{Alignment, Constraint, Direction, Layout, Rect};
[INFO] [stdout]    |                                                             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `x` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:95:21
[INFO] [stdout]    |
[INFO] [stdout] 95 |             let mut x = 0.0_f32;
[INFO] [stdout]    |                     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_x` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `y` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:96:21
[INFO] [stdout]    |
[INFO] [stdout] 96 |             let mut y = 0.0_f32;
[INFO] [stdout]    |                     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_y` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/main.rs:99:17
[INFO] [stdout]    |
[INFO] [stdout] 99 |                 x = t_x;
[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 `y` is never read
[INFO] [stdout]    --> src/main.rs:100:17
[INFO] [stdout]     |
[INFO] [stdout] 100 |                 y = t_y;
[INFO] [stdout]     |                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `x` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:95:21
[INFO] [stdout]    |
[INFO] [stdout] 95 |             let mut x = 0.0_f32;
[INFO] [stdout]    |                     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_x` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `y` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:96:21
[INFO] [stdout]    |
[INFO] [stdout] 96 |             let mut y = 0.0_f32;
[INFO] [stdout]    |                     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_y` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/main.rs:99:17
[INFO] [stdout]    |
[INFO] [stdout] 99 |                 x = t_x;
[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 `y` is never read
[INFO] [stdout]    --> src/main.rs:100:17
[INFO] [stdout]     |
[INFO] [stdout] 100 |                 y = t_y;
[INFO] [stdout]     |                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `input_handle`
[INFO] [stdout]   --> src/util/event.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     input_handle: thread::JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tick_handle`
[INFO] [stdout]   --> src/util/event.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     tick_handle: thread::JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/util/event.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn new() -> Events {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `input_handle`
[INFO] [stdout]   --> src/util/event.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     input_handle: thread::JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tick_handle`
[INFO] [stdout]   --> src/util/event.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     tick_handle: thread::JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/util/event.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn new() -> Events {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.81s
[INFO] running `Command { std: "docker" "inspect" "5748c859da92a8a7299c2a78b5d97768df0067f2be60fbd50f403cfcfc065d38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5748c859da92a8a7299c2a78b5d97768df0067f2be60fbd50f403cfcfc065d38", kill_on_drop: false }`
[INFO] [stdout] 5748c859da92a8a7299c2a78b5d97768df0067f2be60fbd50f403cfcfc065d38