Dec 19 15:47:59.724 INFO checking ilikeavocadoes/form_reader against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 15:47:59.725 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/ilikeavocadoes/form_reader:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 15:47:59.936 INFO [stdout] 016b37fc66b79cc808f4b607f2e089f667b2e993e6a70e704a78627fce1df065
Dec 19 15:47:59.938 INFO running `"docker" "start" "-a" "016b37fc66b79cc808f4b607f2e089f667b2e993e6a70e704a78627fce1df065"`
Dec 19 15:48:01.484 INFO [stderr]    Compiling num-integer v0.1.38
Dec 19 15:48:01.484 INFO [stderr]     Checking crossbeam-epoch v0.3.1
Dec 19 15:48:01.488 INFO [stderr]    Compiling syn v0.14.0
Dec 19 15:48:01.488 INFO [stderr]     Checking alga v0.5.4
Dec 19 15:48:01.488 INFO [stderr]     Checking env_logger v0.5.10
Dec 19 15:48:01.488 INFO [stderr]     Checking rusttype v0.5.2
Dec 19 15:48:03.664 INFO [stderr]     Checking crossbeam-deque v0.2.0
Dec 19 15:48:04.009 INFO [stderr]     Checking quickcheck v0.6.2
Dec 19 15:48:04.592 INFO [stderr]     Checking rayon-core v1.4.0
Dec 19 15:48:06.373 INFO [stderr]     Checking num-bigint v0.1.44
Dec 19 15:48:06.375 INFO [stderr]     Checking num-iter v0.1.37
Dec 19 15:48:07.590 INFO [stderr]     Checking png v0.12.0
Dec 19 15:48:07.978 INFO [stderr]     Checking rayon v1.0.1
Dec 19 15:48:12.139 INFO [stderr]     Checking num-rational v0.1.42
Dec 19 15:48:15.330 INFO [stderr]     Checking num v0.1.42
Dec 19 15:48:16.656 INFO [stderr]     Checking nalgebra v0.13.1
Dec 19 15:48:21.436 INFO [stderr]    Compiling num-derive v0.2.2
Dec 19 15:48:21.616 INFO [stderr]     Checking jpeg-decoder v0.1.14
Dec 19 15:48:25.336 INFO [stderr]     Checking image v0.19.0
Dec 19 15:48:54.044 INFO [stderr]     Checking imageproc v0.15.0
Dec 19 15:48:56.988 INFO [stderr]     Checking form_reader v0.1.0 (/opt/crater/workdir)
Dec 19 15:48:58.172 INFO [stderr] warning: unused variable: `x_out`
Dec 19 15:48:58.172 INFO [stderr]   --> src/main.rs:86:10
Dec 19 15:48:58.172 INFO [stderr]    |
Dec 19 15:48:58.172 INFO [stderr] 86 |     let (x_out, y_out) = (x - 1, y);
Dec 19 15:48:58.172 INFO [stderr]    |          ^^^^^ help: consider using `_x_out` instead
Dec 19 15:48:58.172 INFO [stderr]    |
Dec 19 15:48:58.172 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 15:48:58.172 INFO [stderr] 
Dec 19 15:48:58.172 INFO [stderr] warning: unused variable: `y_out`
Dec 19 15:48:58.172 INFO [stderr]   --> src/main.rs:86:17
Dec 19 15:48:58.172 INFO [stderr]    |
Dec 19 15:48:58.172 INFO [stderr] 86 |     let (x_out, y_out) = (x - 1, y);
Dec 19 15:48:58.172 INFO [stderr]    |                 ^^^^^ help: consider using `_y_out` instead
Dec 19 15:48:58.172 INFO [stderr] 
Dec 19 15:48:58.173 INFO [stderr] warning: unused variable: `x_first`
Dec 19 15:48:58.173 INFO [stderr]    --> src/main.rs:100:9
Dec 19 15:48:58.173 INFO [stderr]     |
Dec 19 15:48:58.173 INFO [stderr] 100 |     let x_first = x;
Dec 19 15:48:58.173 INFO [stderr]     |         ^^^^^^^ help: consider using `_x_first` instead
Dec 19 15:48:58.173 INFO [stderr] 
Dec 19 15:48:58.173 INFO [stderr] warning: unused variable: `y_first`
Dec 19 15:48:58.173 INFO [stderr]    --> src/main.rs:101:9
Dec 19 15:48:58.173 INFO [stderr]     |
Dec 19 15:48:58.173 INFO [stderr] 101 |     let y_first = y;
Dec 19 15:48:58.173 INFO [stderr]     |         ^^^^^^^ help: consider using `_y_first` instead
Dec 19 15:48:58.173 INFO [stderr] 
Dec 19 15:48:58.236 INFO [stderr] warning: variable does not need to be mutable
Dec 19 15:48:58.236 INFO [stderr]   --> src/main.rs:98:81
Dec 19 15:48:58.236 INFO [stderr]    |
Dec 19 15:48:58.236 INFO [stderr] 98 | fn follow_contour(img: &image::GrayImage, x: i64, y: i64, direction: Direction, mut contour: Vec<(i64, i64)>) -> Vec<(i64, i64)> {
Dec 19 15:48:58.236 INFO [stderr]    |                                                                                 ----^^^^^^^
Dec 19 15:48:58.236 INFO [stderr]    |                                                                                 |
Dec 19 15:48:58.236 INFO [stderr]    |                                                                                 help: remove this `mut`
Dec 19 15:48:58.236 INFO [stderr]    |
Dec 19 15:48:58.236 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 15:48:58.244 INFO [stderr] 
Dec 19 15:48:58.311 INFO [stderr] warning: unused variable: `x_out`
Dec 19 15:48:58.312 INFO [stderr]   --> src/main.rs:86:10
Dec 19 15:48:58.312 INFO [stderr]    |
Dec 19 15:48:58.312 INFO [stderr] 86 |     let (x_out, y_out) = (x - 1, y);
Dec 19 15:48:58.312 INFO [stderr]    |          ^^^^^ help: consider using `_x_out` instead
Dec 19 15:48:58.312 INFO [stderr]    |
Dec 19 15:48:58.312 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 15:48:58.312 INFO [stderr] 
Dec 19 15:48:58.312 INFO [stderr] warning: unused variable: `y_out`
Dec 19 15:48:58.312 INFO [stderr]   --> src/main.rs:86:17
Dec 19 15:48:58.312 INFO [stderr]    |
Dec 19 15:48:58.312 INFO [stderr] 86 |     let (x_out, y_out) = (x - 1, y);
Dec 19 15:48:58.312 INFO [stderr]    |                 ^^^^^ help: consider using `_y_out` instead
Dec 19 15:48:58.312 INFO [stderr] 
Dec 19 15:48:58.312 INFO [stderr] warning: unused variable: `x_first`
Dec 19 15:48:58.312 INFO [stderr]    --> src/main.rs:100:9
Dec 19 15:48:58.312 INFO [stderr]     |
Dec 19 15:48:58.312 INFO [stderr] 100 |     let x_first = x;
Dec 19 15:48:58.312 INFO [stderr]     |         ^^^^^^^ help: consider using `_x_first` instead
Dec 19 15:48:58.312 INFO [stderr] 
Dec 19 15:48:58.312 INFO [stderr] warning: unused variable: `y_first`
Dec 19 15:48:58.312 INFO [stderr]    --> src/main.rs:101:9
Dec 19 15:48:58.312 INFO [stderr]     |
Dec 19 15:48:58.312 INFO [stderr] 101 |     let y_first = y;
Dec 19 15:48:58.312 INFO [stderr]     |         ^^^^^^^ help: consider using `_y_first` instead
Dec 19 15:48:58.312 INFO [stderr] 
Dec 19 15:48:58.348 INFO [stderr] warning: variable does not need to be mutable
Dec 19 15:48:58.348 INFO [stderr]   --> src/main.rs:98:81
Dec 19 15:48:58.349 INFO [stderr]    |
Dec 19 15:48:58.349 INFO [stderr] 98 | fn follow_contour(img: &image::GrayImage, x: i64, y: i64, direction: Direction, mut contour: Vec<(i64, i64)>) -> Vec<(i64, i64)> {
Dec 19 15:48:58.349 INFO [stderr]    |                                                                                 ----^^^^^^^
Dec 19 15:48:58.350 INFO [stderr]    |                                                                                 |
Dec 19 15:48:58.350 INFO [stderr]    |                                                                                 help: remove this `mut`
Dec 19 15:48:58.350 INFO [stderr]    |
Dec 19 15:48:58.350 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 15:48:58.351 INFO [stderr] 
Dec 19 15:48:58.396 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 57.13s
Dec 19 15:48:59.238 INFO running `"docker" "inspect" "016b37fc66b79cc808f4b607f2e089f667b2e993e6a70e704a78627fce1df065"`
Dec 19 15:48:59.558 INFO running `"docker" "rm" "-f" "016b37fc66b79cc808f4b607f2e089f667b2e993e6a70e704a78627fce1df065"`
Dec 19 15:48:59.880 INFO [stdout] 016b37fc66b79cc808f4b607f2e089f667b2e993e6a70e704a78627fce1df065