Dec 11 17:04:49.132 INFO checking ilikeavocadoes/form_reader against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 17:04:49.132 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-4/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +aa9aa79c3c583aab59ac9134542d60a780c35e2e-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 11 17:04:49.728 INFO [stdout] 8524095fbfe6da1da8c494d8304325d362d3170db6bd9aeb1111ab74099d65cb
Dec 11 17:04:49.730 INFO running `"docker" "start" "-a" "8524095fbfe6da1da8c494d8304325d362d3170db6bd9aeb1111ab74099d65cb"`
Dec 11 17:04:51.676 INFO [stderr] usermod: no changes
Dec 11 17:04:51.995 INFO [stderr]     Checking custom_derive v0.1.7
Dec 11 17:04:52.000 INFO [stderr]    Compiling syn v0.14.0
Dec 11 17:04:52.008 INFO [stderr]     Checking num-bigint v0.1.44
Dec 11 17:04:52.008 INFO [stderr]     Checking alga v0.5.4
Dec 11 17:04:52.012 INFO [stderr]     Checking env_logger v0.5.10
Dec 11 17:04:52.012 INFO [stderr]     Checking png v0.12.0
Dec 11 17:04:52.012 INFO [stderr]     Checking rusttype v0.5.2
Dec 11 17:04:53.952 INFO [stderr]     Checking conv v0.3.3
Dec 11 17:04:57.312 INFO [stderr]     Checking quickcheck v0.6.2
Dec 11 17:05:02.028 INFO [stderr]     Checking num-rational v0.1.42
Dec 11 17:05:04.984 INFO [stderr]     Checking num v0.1.42
Dec 11 17:05:05.630 INFO [stderr]     Checking nalgebra v0.13.1
Dec 11 17:05:12.480 INFO [stderr]    Compiling num-derive v0.2.2
Dec 11 17:05:15.566 INFO [stderr]     Checking image v0.19.0
Dec 11 17:05:45.292 INFO [stderr]     Checking imageproc v0.15.0
Dec 11 17:05:50.324 INFO [stderr]     Checking form_reader v0.1.0 (/source)
Dec 11 17:05:54.696 INFO [stderr] warning: unused variable: `x_out`
Dec 11 17:05:54.696 INFO [stderr]   --> src/main.rs:86:10
Dec 11 17:05:54.696 INFO [stderr]    |
Dec 11 17:05:54.696 INFO [stderr] 86 |     let (x_out, y_out) = (x - 1, y);
Dec 11 17:05:54.696 INFO [stderr]    |          ^^^^^ help: consider using `_x_out` instead
Dec 11 17:05:54.697 INFO [stderr]    |
Dec 11 17:05:54.697 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 17:05:54.697 INFO [stderr] 
Dec 11 17:05:54.697 INFO [stderr] warning: unused variable: `y_out`
Dec 11 17:05:54.697 INFO [stderr]   --> src/main.rs:86:17
Dec 11 17:05:54.697 INFO [stderr]    |
Dec 11 17:05:54.697 INFO [stderr] 86 |     let (x_out, y_out) = (x - 1, y);
Dec 11 17:05:54.697 INFO [stderr]    |                 ^^^^^ help: consider using `_y_out` instead
Dec 11 17:05:54.697 INFO [stderr] 
Dec 11 17:05:54.697 INFO [stderr] warning: unused variable: `x_first`
Dec 11 17:05:54.697 INFO [stderr]    --> src/main.rs:100:9
Dec 11 17:05:54.697 INFO [stderr]     |
Dec 11 17:05:54.697 INFO [stderr] 100 |     let x_first = x;
Dec 11 17:05:54.697 INFO [stderr]     |         ^^^^^^^ help: consider using `_x_first` instead
Dec 11 17:05:54.697 INFO [stderr] 
Dec 11 17:05:54.697 INFO [stderr] warning: unused variable: `y_first`
Dec 11 17:05:54.697 INFO [stderr]    --> src/main.rs:101:9
Dec 11 17:05:54.697 INFO [stderr]     |
Dec 11 17:05:54.697 INFO [stderr] 101 |     let y_first = y;
Dec 11 17:05:54.697 INFO [stderr]     |         ^^^^^^^ help: consider using `_y_first` instead
Dec 11 17:05:54.697 INFO [stderr] 
Dec 11 17:05:54.765 INFO [stderr] warning: variable does not need to be mutable
Dec 11 17:05:54.765 INFO [stderr]   --> src/main.rs:98:81
Dec 11 17:05:54.765 INFO [stderr]    |
Dec 11 17:05:54.765 INFO [stderr] 98 | fn follow_contour(img: &image::GrayImage, x: i64, y: i64, direction: Direction, mut contour: Vec<(i64, i64)>) -> Vec<(i64, i64)> {
Dec 11 17:05:54.765 INFO [stderr]    |                                                                                 ----^^^^^^^
Dec 11 17:05:54.765 INFO [stderr]    |                                                                                 |
Dec 11 17:05:54.766 INFO [stderr]    |                                                                                 help: remove this `mut`
Dec 11 17:05:54.766 INFO [stderr]    |
Dec 11 17:05:54.766 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 17:05:54.766 INFO [stderr] 
Dec 11 17:05:55.081 INFO [stderr] warning: unused variable: `x_out`
Dec 11 17:05:55.081 INFO [stderr]   --> src/main.rs:86:10
Dec 11 17:05:55.081 INFO [stderr]    |
Dec 11 17:05:55.081 INFO [stderr] 86 |     let (x_out, y_out) = (x - 1, y);
Dec 11 17:05:55.081 INFO [stderr]    |          ^^^^^ help: consider using `_x_out` instead
Dec 11 17:05:55.081 INFO [stderr]    |
Dec 11 17:05:55.081 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 17:05:55.081 INFO [stderr] 
Dec 11 17:05:55.081 INFO [stderr] warning: unused variable: `y_out`
Dec 11 17:05:55.081 INFO [stderr]   --> src/main.rs:86:17
Dec 11 17:05:55.081 INFO [stderr]    |
Dec 11 17:05:55.081 INFO [stderr] 86 |     let (x_out, y_out) = (x - 1, y);
Dec 11 17:05:55.081 INFO [stderr]    |                 ^^^^^ help: consider using `_y_out` instead
Dec 11 17:05:55.081 INFO [stderr] 
Dec 11 17:05:55.081 INFO [stderr] warning: unused variable: `x_first`
Dec 11 17:05:55.081 INFO [stderr]    --> src/main.rs:100:9
Dec 11 17:05:55.081 INFO [stderr]     |
Dec 11 17:05:55.081 INFO [stderr] 100 |     let x_first = x;
Dec 11 17:05:55.081 INFO [stderr]     |         ^^^^^^^ help: consider using `_x_first` instead
Dec 11 17:05:55.081 INFO [stderr] 
Dec 11 17:05:55.081 INFO [stderr] warning: unused variable: `y_first`
Dec 11 17:05:55.081 INFO [stderr]    --> src/main.rs:101:9
Dec 11 17:05:55.081 INFO [stderr]     |
Dec 11 17:05:55.081 INFO [stderr] 101 |     let y_first = y;
Dec 11 17:05:55.081 INFO [stderr]     |         ^^^^^^^ help: consider using `_y_first` instead
Dec 11 17:05:55.081 INFO [stderr] 
Dec 11 17:05:55.112 INFO [stderr] warning: variable does not need to be mutable
Dec 11 17:05:55.112 INFO [stderr]   --> src/main.rs:98:81
Dec 11 17:05:55.112 INFO [stderr]    |
Dec 11 17:05:55.112 INFO [stderr] 98 | fn follow_contour(img: &image::GrayImage, x: i64, y: i64, direction: Direction, mut contour: Vec<(i64, i64)>) -> Vec<(i64, i64)> {
Dec 11 17:05:55.112 INFO [stderr]    |                                                                                 ----^^^^^^^
Dec 11 17:05:55.112 INFO [stderr]    |                                                                                 |
Dec 11 17:05:55.112 INFO [stderr]    |                                                                                 help: remove this `mut`
Dec 11 17:05:55.112 INFO [stderr]    |
Dec 11 17:05:55.112 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 17:05:55.112 INFO [stderr] 
Dec 11 17:05:55.172 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 03s
Dec 11 17:05:55.189 INFO [stderr] su: No module specific data is present
Dec 11 17:05:56.112 INFO running `"docker" "inspect" "8524095fbfe6da1da8c494d8304325d362d3170db6bd9aeb1111ab74099d65cb"`
Dec 11 17:05:56.382 INFO running `"docker" "rm" "-f" "8524095fbfe6da1da8c494d8304325d362d3170db6bd9aeb1111ab74099d65cb"`
Dec 11 17:05:56.640 INFO [stdout] 8524095fbfe6da1da8c494d8304325d362d3170db6bd9aeb1111ab74099d65cb