[INFO] cloning repository https://github.com/jeremyarde/domino-counter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jeremyarde/domino-counter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeremyarde%2Fdomino-counter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeremyarde%2Fdomino-counter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 16cd8d12f76bf21e133eb882d1234fc3a514681e
[INFO] checking jeremyarde/domino-counter against master#f5f33ec0e0455eefa72fc5567eb1280a4d5ee206 for pr-83312
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeremyarde%2Fdomino-counter" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jeremyarde/domino-counter on toolchain f5f33ec0e0455eefa72fc5567eb1280a4d5ee206
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jeremyarde/domino-counter
[INFO] finished tweaking git repo https://github.com/jeremyarde/domino-counter
[INFO] tweaked toml for git repo https://github.com/jeremyarde/domino-counter written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/jeremyarde/domino-counter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: env
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b47a1000cb83fdb285ef2d83169d62703da02a3e0585ef79333d17903ec432d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6b47a1000cb83fdb285ef2d83169d62703da02a3e0585ef79333d17903ec432d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b47a1000cb83fdb285ef2d83169d62703da02a3e0585ef79333d17903ec432d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b47a1000cb83fdb285ef2d83169d62703da02a3e0585ef79333d17903ec432d", kill_on_drop: false }`
[INFO] [stdout] 6b47a1000cb83fdb285ef2d83169d62703da02a3e0585ef79333d17903ec432d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6dd40d818bbeee16322502462fbfe175b77e973e625608ec8829d24fec93e8c7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6dd40d818bbeee16322502462fbfe175b77e973e625608ec8829d24fec93e8c7", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: env
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]     Checking weezl v0.1.4
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking bytemuck v1.5.1
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking ab_glyph_rasterizer v0.1.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.3.2
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking miniz_oxide v0.3.7
[INFO] [stderr]     Checking rusttype v0.9.2
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking deflate v0.8.6
[INFO] [stderr]     Checking gif v0.11.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.3
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking png v0.16.8
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking rulinalg v0.4.2
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]     Checking num v0.3.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking tiff v0.6.1
[INFO] [stderr]     Checking image v0.23.14
[INFO] [stderr]     Checking imageproc v0.22.0
[INFO] [stderr]     Checking domino-counter v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `topedge`
[INFO] [stdout]    --> src/main.rs:327:13
[INFO] [stdout]     |
[INFO] [stdout] 327 |     let mut topedge = 0;
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_topedge`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bottomedge`
[INFO] [stdout]    --> src/main.rs:328:13
[INFO] [stdout]     |
[INFO] [stdout] 328 |     let mut bottomedge = 0;
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_bottomedge`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ratio`
[INFO] [stdout]    --> src/main.rs:568:40
[INFO] [stdout]     |
[INFO] [stdout] 568 | fn guess_domino(buckets: &[(u8, u32)], ratio: &f32) -> u8 {
[INFO] [stdout]     |                                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_ratio`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `topedge`
[INFO] [stdout]    --> src/main.rs:327:13
[INFO] [stdout]     |
[INFO] [stdout] 327 |     let mut topedge = 0;
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_topedge`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bottomedge`
[INFO] [stdout]    --> src/main.rs:328:13
[INFO] [stdout]     |
[INFO] [stdout] 328 |     let mut bottomedge = 0;
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_bottomedge`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ratio`
[INFO] [stdout]    --> src/main.rs:568:40
[INFO] [stdout]     |
[INFO] [stdout] 568 | fn guess_domino(buckets: &[(u8, u32)], ratio: &f32) -> u8 {
[INFO] [stdout]     |                                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_ratio`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:327:9
[INFO] [stdout]     |
[INFO] [stdout] 327 |     let mut topedge = 0;
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:328:9
[INFO] [stdout]     |
[INFO] [stdout] 328 |     let mut bottomedge = 0;
[INFO] [stdout]     |         ----^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:327:9
[INFO] [stdout]     |
[INFO] [stdout] 327 |     let mut topedge = 0;
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:328:9
[INFO] [stdout]     |
[INFO] [stdout] 328 |     let mut bottomedge = 0;
[INFO] [stdout]     |         ----^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `detect_domino_edges_eval_data`
[INFO] [stdout]    --> src/main.rs:278:4
[INFO] [stdout]     |
[INFO] [stdout] 278 | fn detect_domino_edges_eval_data(image: &DynamicImage) -> DominoImageSection {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `count_most_common_pixels`
[INFO] [stdout]    --> src/main.rs:644:4
[INFO] [stdout]     |
[INFO] [stdout] 644 | fn count_most_common_pixels(img: &DynamicImage) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `histogram`
[INFO] [stdout]    --> src/main.rs:684:4
[INFO] [stdout]     |
[INFO] [stdout] 684 | fn histogram(img: &DynamicImage) {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `manipulate_image`
[INFO] [stdout]    --> src/main.rs:783:4
[INFO] [stdout]     |
[INFO] [stdout] 783 | fn manipulate_image() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `detect_domino_edges_eval_data`
[INFO] [stdout]    --> src/main.rs:278:4
[INFO] [stdout]     |
[INFO] [stdout] 278 | fn detect_domino_edges_eval_data(image: &DynamicImage) -> DominoImageSection {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `count_most_common_pixels`
[INFO] [stdout]    --> src/main.rs:644:4
[INFO] [stdout]     |
[INFO] [stdout] 644 | fn count_most_common_pixels(img: &DynamicImage) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `histogram`
[INFO] [stdout]    --> src/main.rs:684:4
[INFO] [stdout]     |
[INFO] [stdout] 684 | fn histogram(img: &DynamicImage) {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `manipulate_image`
[INFO] [stdout]    --> src/main.rs:783:4
[INFO] [stdout]     |
[INFO] [stdout] 783 | fn manipulate_image() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.47s
[INFO] running `Command { std: "docker" "inspect" "6dd40d818bbeee16322502462fbfe175b77e973e625608ec8829d24fec93e8c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dd40d818bbeee16322502462fbfe175b77e973e625608ec8829d24fec93e8c7", kill_on_drop: false }`
[INFO] [stdout] 6dd40d818bbeee16322502462fbfe175b77e973e625608ec8829d24fec93e8c7