[INFO] updating cached repository swapsCAPS/hexapod
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/swapsCAPS/hexapod
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/swapsCAPS/hexapod" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/swapsCAPS/hexapod"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/swapsCAPS/hexapod'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/swapsCAPS/hexapod" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/swapsCAPS/hexapod"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/swapsCAPS/hexapod'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 13d9e452f9ca34b94b5533db44f4b727466169d0
[INFO] sha for GitHub repo swapsCAPS/hexapod: 13d9e452f9ca34b94b5533db44f4b727466169d0
[INFO] validating manifest of swapsCAPS/hexapod on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of swapsCAPS/hexapod on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing swapsCAPS/hexapod
[INFO] finished frobbing swapsCAPS/hexapod
[INFO] frobbed toml for swapsCAPS/hexapod written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/swapsCAPS/hexapod/Cargo.toml
[INFO] started frobbing swapsCAPS/hexapod
[INFO] finished frobbing swapsCAPS/hexapod
[INFO] frobbed toml for swapsCAPS/hexapod written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/swapsCAPS/hexapod/Cargo.toml
[INFO] crate swapsCAPS/hexapod already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking swapsCAPS/hexapod against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-3/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/swapsCAPS/hexapod:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 8824ad242a6bdfb162086a856a3a6d386f2480ace69f0b3e455ba3970f9f4c68
[INFO] running `"docker" "start" "-a" "8824ad242a6bdfb162086a856a3a6d386f2480ace69f0b3e455ba3970f9f4c68"`
[INFO] [stderr]    Compiling syn v0.15.30
[INFO] [stderr]    Compiling rustc-demangle v0.1.13
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]     Checking nix v0.10.0
[INFO] [stderr]    Compiling backtrace v0.3.15
[INFO] [stderr]    Compiling error-chain v0.12.0
[INFO] [stderr]    Compiling serde_derive v1.0.90
[INFO] [stderr]    Compiling cargo_metadata v0.6.4
[INFO] [stderr]    Compiling skeptic v0.13.4
[INFO] [stderr]    Compiling i2cdev v0.3.2
[INFO] [stderr]    Compiling i2c-pca9685 v0.1.9-pre (https://github.com/querry43/i2c-pca9685#4b0ddf24)
[INFO] [stderr]     Checking hexapod v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/main.rs:102:11
[INFO] [stderr]     |
[INFO] [stderr] 102 |           _ => {
[INFO] [stderr]     |           ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/main.rs:124:11
[INFO] [stderr]     |
[INFO] [stderr] 124 |           _ => {
[INFO] [stderr]     |           ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/main.rs:129:7
[INFO] [stderr]     |
[INFO] [stderr] 129 |       _ => {
[INFO] [stderr]     |       ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/main.rs:156:7
[INFO] [stderr]     |
[INFO] [stderr] 156 |       _ => {
[INFO] [stderr]     |       ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/main.rs:173:7
[INFO] [stderr]     |
[INFO] [stderr] 173 |       _ => {
[INFO] [stderr]     |       ^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `speed`
[INFO] [stderr]    --> src/main.rs:179:33
[INFO] [stderr]     |
[INFO] [stderr] 179 |   fn step(&mut self, _dir: u16, speed: u64) {
[INFO] [stderr]     |                                 ^^^^^ help: consider prefixing with an underscore: `_speed`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dir`
[INFO] [stderr]    --> src/main.rs:245:24
[INFO] [stderr]     |
[INFO] [stderr] 245 |   fn step_a(&mut self, dir: u16, speed: u64) {
[INFO] [stderr]     |                        ^^^ help: consider prefixing with an underscore: `_dir`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `speed`
[INFO] [stderr]    --> src/main.rs:245:34
[INFO] [stderr]     |
[INFO] [stderr] 245 |   fn step_a(&mut self, dir: u16, speed: u64) {
[INFO] [stderr]     |                                  ^^^^^ help: consider prefixing with an underscore: `_speed`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dir`
[INFO] [stderr]    --> src/main.rs:275:24
[INFO] [stderr]     |
[INFO] [stderr] 275 |   fn step_b(&mut self, dir: u16, speed: u64) {
[INFO] [stderr]     |                        ^^^ help: consider prefixing with an underscore: `_dir`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `speed`
[INFO] [stderr]    --> src/main.rs:275:34
[INFO] [stderr]     |
[INFO] [stderr] 275 |   fn step_b(&mut self, dir: u16, speed: u64) {
[INFO] [stderr]     |                                  ^^^^^ help: consider prefixing with an underscore: `_speed`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/main.rs:102:11
[INFO] [stderr]     |
[INFO] [stderr] 102 |           _ => {
[INFO] [stderr]     |           ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/main.rs:124:11
[INFO] [stderr]     |
[INFO] [stderr] 124 |           _ => {
[INFO] [stderr]     |           ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/main.rs:129:7
[INFO] [stderr]     |
[INFO] [stderr] 129 |       _ => {
[INFO] [stderr]     |       ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/main.rs:156:7
[INFO] [stderr]     |
[INFO] [stderr] 156 |       _ => {
[INFO] [stderr]     |       ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/main.rs:173:7
[INFO] [stderr]     |
[INFO] [stderr] 173 |       _ => {
[INFO] [stderr]     |       ^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `speed`
[INFO] [stderr]    --> src/main.rs:179:33
[INFO] [stderr]     |
[INFO] [stderr] 179 |   fn step(&mut self, _dir: u16, speed: u64) {
[INFO] [stderr]     |                                 ^^^^^ help: consider prefixing with an underscore: `_speed`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dir`
[INFO] [stderr]    --> src/main.rs:245:24
[INFO] [stderr]     |
[INFO] [stderr] 245 |   fn step_a(&mut self, dir: u16, speed: u64) {
[INFO] [stderr]     |                        ^^^ help: consider prefixing with an underscore: `_dir`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `speed`
[INFO] [stderr]    --> src/main.rs:245:34
[INFO] [stderr]     |
[INFO] [stderr] 245 |   fn step_a(&mut self, dir: u16, speed: u64) {
[INFO] [stderr]     |                                  ^^^^^ help: consider prefixing with an underscore: `_speed`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dir`
[INFO] [stderr]    --> src/main.rs:275:24
[INFO] [stderr]     |
[INFO] [stderr] 275 |   fn step_b(&mut self, dir: u16, speed: u64) {
[INFO] [stderr]     |                        ^^^ help: consider prefixing with an underscore: `_dir`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `speed`
[INFO] [stderr]    --> src/main.rs:275:34
[INFO] [stderr]     |
[INFO] [stderr] 275 |   fn step_b(&mut self, dir: u16, speed: u64) {
[INFO] [stderr]     |                                  ^^^^^ help: consider prefixing with an underscore: `_speed`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `max`
[INFO] [stderr]   --> src/main.rs:26:3
[INFO] [stderr]    |
[INFO] [stderr] 26 |   max:           u16,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `test`
[INFO] [stderr]   --> src/main.rs:44:3
[INFO] [stderr]    |
[INFO] [stderr] 44 |   fn test(&self) {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:79:3
[INFO] [stderr]    |
[INFO] [stderr] 79 |   fn new(side: Side, leg_type: LegType, pelvis: Joint<'a>, knee: Joint<'a>, ankle: Joint<'a>) -> Leg<'a> {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `lower`
[INFO] [stderr]    --> src/main.rs:135:3
[INFO] [stderr]     |
[INFO] [stderr] 135 |   fn lower(&mut self) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `raise`
[INFO] [stderr]    --> src/main.rs:140:3
[INFO] [stderr]     |
[INFO] [stderr] 140 |   fn raise(&mut self) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `forward`
[INFO] [stderr]    --> src/main.rs:145:3
[INFO] [stderr]     |
[INFO] [stderr] 145 |   fn forward(&mut self) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `backward`
[INFO] [stderr]    --> src/main.rs:162:3
[INFO] [stderr]     |
[INFO] [stderr] 162 |   fn backward(&mut self) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `step`
[INFO] [stderr]    --> src/main.rs:179:3
[INFO] [stderr]     |
[INFO] [stderr] 179 |   fn step(&mut self, _dir: u16, speed: u64) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ServoWrapper`
[INFO] [stderr]   --> src/main.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | struct ServoWrapper {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:14:3
[INFO] [stderr]    |
[INFO] [stderr] 14 |   fn new(address: u16) -> ServoWrapper {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Joint`
[INFO] [stderr]   --> src/main.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | struct Joint<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:31:3
[INFO] [stderr]    |
[INFO] [stderr] 31 |   fn new(servo_wrapper: &ServoWrapper, pin: u8, min: u16, max: u16) -> Joint {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `mv`
[INFO] [stderr]   --> src/main.rs:37:3
[INFO] [stderr]    |
[INFO] [stderr] 37 |   fn mv(&mut self, degrees: u16) {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `test`
[INFO] [stderr]   --> src/main.rs:44:3
[INFO] [stderr]    |
[INFO] [stderr] 44 |   fn test(&self) {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `LegType`
[INFO] [stderr]   --> src/main.rs:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 | enum LegType { Front, Middle, Back }
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Side`
[INFO] [stderr]   --> src/main.rs:66:1
[INFO] [stderr]    |
[INFO] [stderr] 66 | enum Side { Left, Right }
[INFO] [stderr]    | ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Leg`
[INFO] [stderr]   --> src/main.rs:70:1
[INFO] [stderr]    |
[INFO] [stderr] 70 | struct Leg<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:79:3
[INFO] [stderr]    |
[INFO] [stderr] 79 |   fn new(side: Side, leg_type: LegType, pelvis: Joint<'a>, knee: Joint<'a>, ankle: Joint<'a>) -> Leg<'a> {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reset`
[INFO] [stderr]   --> src/main.rs:83:3
[INFO] [stderr]    |
[INFO] [stderr] 83 |   fn reset(&mut self) {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `lower`
[INFO] [stderr]    --> src/main.rs:135:3
[INFO] [stderr]     |
[INFO] [stderr] 135 |   fn lower(&mut self) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `raise`
[INFO] [stderr]    --> src/main.rs:140:3
[INFO] [stderr]     |
[INFO] [stderr] 140 |   fn raise(&mut self) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `forward`
[INFO] [stderr]    --> src/main.rs:145:3
[INFO] [stderr]     |
[INFO] [stderr] 145 |   fn forward(&mut self) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `backward`
[INFO] [stderr]    --> src/main.rs:162:3
[INFO] [stderr]     |
[INFO] [stderr] 162 |   fn backward(&mut self) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `step`
[INFO] [stderr]    --> src/main.rs:179:3
[INFO] [stderr]     |
[INFO] [stderr] 179 |   fn step(&mut self, _dir: u16, speed: u64) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Brain`
[INFO] [stderr]    --> src/main.rs:187:1
[INFO] [stderr]     |
[INFO] [stderr] 187 | struct Brain<'a> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:196:3
[INFO] [stderr]     |
[INFO] [stderr] 196 |   fn new(left: &'a ServoWrapper, right: &'a ServoWrapper) -> Brain<'a> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `step_a`
[INFO] [stderr]    --> src/main.rs:245:3
[INFO] [stderr]     |
[INFO] [stderr] 245 |   fn step_a(&mut self, dir: u16, speed: u64) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `step_b`
[INFO] [stderr]    --> src/main.rs:275:3
[INFO] [stderr]     |
[INFO] [stderr] 275 |   fn step_b(&mut self, dir: u16, speed: u64) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `walk`
[INFO] [stderr]    --> src/main.rs:310:3
[INFO] [stderr]     |
[INFO] [stderr] 310 |   fn walk(&mut self, dir: u16, speed: u64) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 48.52s
[INFO] running `"docker" "inspect" "8824ad242a6bdfb162086a856a3a6d386f2480ace69f0b3e455ba3970f9f4c68"`
[INFO] running `"docker" "rm" "-f" "8824ad242a6bdfb162086a856a3a6d386f2480ace69f0b3e455ba3970f9f4c68"`
[INFO] [stdout] 8824ad242a6bdfb162086a856a3a6d386f2480ace69f0b3e455ba3970f9f4c68