[INFO] cloning repository https://github.com/birchling/multi-otsu
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/birchling/multi-otsu" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbirchling%2Fmulti-otsu", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbirchling%2Fmulti-otsu'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0349784df2784ea107b5c1c0021d260a55ec045f
[INFO] testing birchling/multi-otsu against beta-2020-10-09 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbirchling%2Fmulti-otsu" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/birchling/multi-otsu on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/birchling/multi-otsu
[INFO] finished tweaking git repo https://github.com/birchling/multi-otsu
[INFO] tweaked toml for git repo https://github.com/birchling/multi-otsu written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/birchling/multi-otsu already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded hermit-abi v0.1.5
[INFO] [stderr]   Downloaded rulinalg v0.4.2
[INFO] [stderr]   Downloaded imageproc v0.19.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7576cb0ba9f615f4ad4ae79a45b353abfb17f5ab2cc574467cfa0f7b28f838f0
[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" "7576cb0ba9f615f4ad4ae79a45b353abfb17f5ab2cc574467cfa0f7b28f838f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7576cb0ba9f615f4ad4ae79a45b353abfb17f5ab2cc574467cfa0f7b28f838f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7576cb0ba9f615f4ad4ae79a45b353abfb17f5ab2cc574467cfa0f7b28f838f0", kill_on_drop: false }`
[INFO] [stdout] 7576cb0ba9f615f4ad4ae79a45b353abfb17f5ab2cc574467cfa0f7b28f838f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 725ab92e812a40a196e750ad6e07a740393da79a580163b7a49f046c4af42799
[INFO] running `Command { std: "docker" "start" "-a" "725ab92e812a40a196e750ad6e07a740393da79a580163b7a49f046c4af42799", kill_on_drop: false }`
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-bigint v0.2.3
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling rulinalg v0.4.2
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling image v0.22.3
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling imageproc v0.19.2
[INFO] [stderr]    Compiling multi-otsu v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0425]: cannot find function `histogram` in this scope
[INFO] [stdout]   --> src/main.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let hist = histogram(image);
[INFO] [stdout]    |                ^^^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]    |
[INFO] [stdout] 2  | use imageproc::stats::histogram;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `best_threshold` in this scope
[INFO] [stdout]   --> src/main.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |             best_threshold = threshold as u8;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^ help: a local variable with a similar name exists: `best_thresholds`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `best_threshold` in this scope
[INFO] [stdout]   --> src/main.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     best_threshold
[INFO] [stdout]    |     ^^^^^^^^^^^^^^ help: a local variable with a similar name exists: `best_thresholds`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Luma`
[INFO] [stdout]  --> src/main.rs:2:30
[INFO] [stdout]   |
[INFO] [stdout] 2 | use image::{open, GrayImage, Luma};
[INFO] [stdout]   |                              ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `otsu_level`, `threshold`
[INFO] [stdout]  --> src/main.rs:4:27
[INFO] [stdout]   |
[INFO] [stdout] 4 | use imageproc::contrast::{otsu_level, threshold};
[INFO] [stdout]   |                           ^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `multi-otsu`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "725ab92e812a40a196e750ad6e07a740393da79a580163b7a49f046c4af42799", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "725ab92e812a40a196e750ad6e07a740393da79a580163b7a49f046c4af42799", kill_on_drop: false }`
[INFO] [stdout] 725ab92e812a40a196e750ad6e07a740393da79a580163b7a49f046c4af42799
