Dec 04 17:20:43.137 INFO checking ilikeavocadoes/form_reader against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 17:20:43.138 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-2/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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 04 17:20:43.709 INFO [stdout] 88632c86d0a6f4e4f9ddd11eff97e2080d2882a6f1e66fc9c221384e0e60cd4c
Dec 04 17:20:43.712 INFO running `"docker" "start" "-a" "88632c86d0a6f4e4f9ddd11eff97e2080d2882a6f1e66fc9c221384e0e60cd4c"`
Dec 04 17:20:46.102 INFO [stderr] usermod: no changes
Dec 04 17:20:46.360 INFO [stderr]     Checking custom_derive v0.1.7
Dec 04 17:20:46.363 INFO [stderr]    Compiling syn v0.14.0
Dec 04 17:20:46.364 INFO [stderr]     Checking rayon-core v1.4.0
Dec 04 17:20:46.364 INFO [stderr]     Checking alga v0.5.4
Dec 04 17:20:46.392 INFO [stderr]     Checking env_logger v0.5.10
Dec 04 17:20:46.392 INFO [stderr]     Checking png v0.12.0
Dec 04 17:20:46.392 INFO [stderr]     Checking rusttype v0.5.2
Dec 04 17:20:48.100 INFO [stderr]     Checking conv v0.3.3
Dec 04 17:20:53.296 INFO [stderr]     Checking rayon v1.0.1
Dec 04 17:20:53.425 INFO [stderr]     Checking quickcheck v0.6.2
Dec 04 17:21:03.309 INFO [stderr]     Checking nalgebra v0.13.1
Dec 04 17:21:05.271 INFO [stderr]     Checking jpeg-decoder v0.1.14
Dec 04 17:21:08.765 INFO [stderr]    Compiling num-derive v0.2.2
Dec 04 17:21:12.109 INFO [stderr]     Checking image v0.19.0
Dec 04 17:21:42.141 INFO [stderr]     Checking imageproc v0.15.0
Dec 04 17:21:46.860 INFO [stderr]     Checking form_reader v0.1.0 (/source)
Dec 04 17:21:51.423 INFO [stderr] warning: unused variable: `x_out`
Dec 04 17:21:51.423 INFO [stderr]   --> src/main.rs:86:10
Dec 04 17:21:51.423 INFO [stderr]    |
Dec 04 17:21:51.423 INFO [stderr] 86 |     let (x_out, y_out) = (x - 1, y);
Dec 04 17:21:51.423 INFO [stderr]    |          ^^^^^ help: consider using `_x_out` instead
Dec 04 17:21:51.423 INFO [stderr]    |
Dec 04 17:21:51.437 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 17:21:51.437 INFO [stderr] 
Dec 04 17:21:51.437 INFO [stderr] warning: unused variable: `y_out`
Dec 04 17:21:51.437 INFO [stderr]   --> src/main.rs:86:17
Dec 04 17:21:51.437 INFO [stderr]    |
Dec 04 17:21:51.437 INFO [stderr] 86 |     let (x_out, y_out) = (x - 1, y);
Dec 04 17:21:51.437 INFO [stderr]    |                 ^^^^^ help: consider using `_y_out` instead
Dec 04 17:21:51.437 INFO [stderr] 
Dec 04 17:21:51.437 INFO [stderr] warning: unused variable: `x_first`
Dec 04 17:21:51.437 INFO [stderr]    --> src/main.rs:100:9
Dec 04 17:21:51.437 INFO [stderr]     |
Dec 04 17:21:51.437 INFO [stderr] 100 |     let x_first = x;
Dec 04 17:21:51.437 INFO [stderr]     |         ^^^^^^^ help: consider using `_x_first` instead
Dec 04 17:21:51.438 INFO [stderr] 
Dec 04 17:21:51.438 INFO [stderr] warning: unused variable: `y_first`
Dec 04 17:21:51.438 INFO [stderr]    --> src/main.rs:101:9
Dec 04 17:21:51.438 INFO [stderr]     |
Dec 04 17:21:51.438 INFO [stderr] 101 |     let y_first = y;
Dec 04 17:21:51.438 INFO [stderr]     |         ^^^^^^^ help: consider using `_y_first` instead
Dec 04 17:21:51.438 INFO [stderr] 
Dec 04 17:21:51.459 INFO [stderr] warning: unused variable: `x_out`
Dec 04 17:21:51.459 INFO [stderr]   --> src/main.rs:86:10
Dec 04 17:21:51.459 INFO [stderr]    |
Dec 04 17:21:51.459 INFO [stderr] 86 |     let (x_out, y_out) = (x - 1, y);
Dec 04 17:21:51.459 INFO [stderr]    |          ^^^^^ help: consider using `_x_out` instead
Dec 04 17:21:51.459 INFO [stderr]    |
Dec 04 17:21:51.459 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 17:21:51.459 INFO [stderr] 
Dec 04 17:21:51.459 INFO [stderr] warning: unused variable: `y_out`
Dec 04 17:21:51.459 INFO [stderr]   --> src/main.rs:86:17
Dec 04 17:21:51.459 INFO [stderr]    |
Dec 04 17:21:51.459 INFO [stderr] 86 |     let (x_out, y_out) = (x - 1, y);
Dec 04 17:21:51.459 INFO [stderr]    |                 ^^^^^ help: consider using `_y_out` instead
Dec 04 17:21:51.459 INFO [stderr] 
Dec 04 17:21:51.464 INFO [stderr] warning: unused variable: `x_first`
Dec 04 17:21:51.464 INFO [stderr]    --> src/main.rs:100:9
Dec 04 17:21:51.464 INFO [stderr]     |
Dec 04 17:21:51.464 INFO [stderr] 100 |     let x_first = x;
Dec 04 17:21:51.464 INFO [stderr]     |         ^^^^^^^ help: consider using `_x_first` instead
Dec 04 17:21:51.464 INFO [stderr] 
Dec 04 17:21:51.464 INFO [stderr] warning: unused variable: `y_first`
Dec 04 17:21:51.464 INFO [stderr]    --> src/main.rs:101:9
Dec 04 17:21:51.464 INFO [stderr]     |
Dec 04 17:21:51.464 INFO [stderr] 101 |     let y_first = y;
Dec 04 17:21:51.464 INFO [stderr]     |         ^^^^^^^ help: consider using `_y_first` instead
Dec 04 17:21:51.464 INFO [stderr] 
Dec 04 17:21:51.489 INFO [stderr] warning: variable does not need to be mutable
Dec 04 17:21:51.489 INFO [stderr]   --> src/main.rs:98:81
Dec 04 17:21:51.489 INFO [stderr]    |
Dec 04 17:21:51.489 INFO [stderr] 98 | fn follow_contour(img: &image::GrayImage, x: i64, y: i64, direction: Direction, mut contour: Vec<(i64, i64)>) -> Vec<(i64, i64)> {
Dec 04 17:21:51.489 INFO [stderr]    |                                                                                 ----^^^^^^^
Dec 04 17:21:51.489 INFO [stderr]    |                                                                                 |
Dec 04 17:21:51.489 INFO [stderr]    |                                                                                 help: remove this `mut`
Dec 04 17:21:51.489 INFO [stderr]    |
Dec 04 17:21:51.489 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 17:21:51.489 INFO [stderr] 
Dec 04 17:21:51.503 INFO [stderr] warning: variable does not need to be mutable
Dec 04 17:21:51.503 INFO [stderr]   --> src/main.rs:98:81
Dec 04 17:21:51.503 INFO [stderr]    |
Dec 04 17:21:51.503 INFO [stderr] 98 | fn follow_contour(img: &image::GrayImage, x: i64, y: i64, direction: Direction, mut contour: Vec<(i64, i64)>) -> Vec<(i64, i64)> {
Dec 04 17:21:51.503 INFO [stderr]    |                                                                                 ----^^^^^^^
Dec 04 17:21:51.503 INFO [stderr]    |                                                                                 |
Dec 04 17:21:51.503 INFO [stderr]    |                                                                                 help: remove this `mut`
Dec 04 17:21:51.503 INFO [stderr]    |
Dec 04 17:21:51.503 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 17:21:51.503 INFO [stderr] 
Dec 04 17:21:51.559 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 05s
Dec 04 17:21:51.573 INFO [stderr] su: No module specific data is present
Dec 04 17:21:52.436 INFO running `"docker" "inspect" "88632c86d0a6f4e4f9ddd11eff97e2080d2882a6f1e66fc9c221384e0e60cd4c"`
Dec 04 17:21:52.787 INFO running `"docker" "rm" "-f" "88632c86d0a6f4e4f9ddd11eff97e2080d2882a6f1e66fc9c221384e0e60cd4c"`
Dec 04 17:21:53.103 INFO [stdout] 88632c86d0a6f4e4f9ddd11eff97e2080d2882a6f1e66fc9c221384e0e60cd4c