[INFO] cloning repository https://github.com/birchling/multi-otsu
[INFO] running `"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"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbirchling%2Fmulti-otsu'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0349784df2784ea107b5c1c0021d260a55ec045f
[INFO] checking birchling/multi-otsu against master#6250d56355d72264ece721e8d0dc95b16a6824b1 for pr-68350
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbirchling%2Fmulti-otsu" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/birchling/multi-otsu on toolchain 6250d56355d72264ece721e8d0dc95b16a6824b1
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-14/source/Cargo.toml
[INFO] crate git repo https://github.com/birchling/multi-otsu already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c71b8ffcc5f7f103ce6e4fda6ef229a5e14453c3d8e3ac6cc2f16f1f7740eec4
[INFO] running `"docker" "start" "-a" "c71b8ffcc5f7f103ce6e4fda6ef229a5e14453c3d8e3ac6cc2f16f1f7740eec4"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rulinalg v0.4.2
[INFO] [stderr]     Checking jpeg-decoder v0.1.18
[INFO] [stderr]     Checking image v0.22.3
[INFO] [stderr]     Checking imageproc v0.19.2
[INFO] [stderr]     Checking multi-otsu v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0425]: cannot find function `histogram` in this scope
[INFO] [stderr]   --> src/main.rs:11:16
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let hist = histogram(image);
[INFO] [stderr]    |                ^^^^^^^^^ not found in this scope
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 2  | use imageproc::stats::histogram;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `best_threshold` in this scope
[INFO] [stderr]   --> src/main.rs:56:13
[INFO] [stderr]    |
[INFO] [stderr] 56 |             best_threshold = threshold as u8;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: a local variable with a similar name exists: `best_thresholds`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `best_threshold` in this scope
[INFO] [stderr]   --> src/main.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     best_threshold
[INFO] [stderr]    |     ^^^^^^^^^^^^^^ help: a local variable with a similar name exists: `best_thresholds`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Luma`
[INFO] [stderr]  --> src/main.rs:2:30
[INFO] [stderr]   |
[INFO] [stderr] 2 | use image::{open, GrayImage, Luma};
[INFO] [stderr]   |                              ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `otsu_level`, `threshold`
[INFO] [stderr]  --> src/main.rs:4:27
[INFO] [stderr]   |
[INFO] [stderr] 4 | use imageproc::contrast::{otsu_level, threshold};
[INFO] [stderr]   |                           ^^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0425`.
[INFO] [stderr] error[E0425]: cannot find function `histogram` in this scope
[INFO] [stderr]   --> src/main.rs:11:16
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let hist = histogram(image);
[INFO] [stderr]    |                ^^^^^^^^^ not found in this scope
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 2  | use imageproc::stats::histogram;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `multi-otsu`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0425]: cannot find value `best_threshold` in this scope
[INFO] [stderr]   --> src/main.rs:56:13
[INFO] [stderr]    |
[INFO] [stderr] 56 |             best_threshold = threshold as u8;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: a local variable with a similar name exists: `best_thresholds`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `best_threshold` in this scope
[INFO] [stderr]   --> src/main.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     best_threshold
[INFO] [stderr]    |     ^^^^^^^^^^^^^^ help: a local variable with a similar name exists: `best_thresholds`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Luma`
[INFO] [stderr]  --> src/main.rs:2:30
[INFO] [stderr]   |
[INFO] [stderr] 2 | use image::{open, GrayImage, Luma};
[INFO] [stderr]   |                              ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `otsu_level`, `threshold`
[INFO] [stderr]  --> src/main.rs:4:27
[INFO] [stderr]   |
[INFO] [stderr] 4 | use imageproc::contrast::{otsu_level, threshold};
[INFO] [stderr]   |                           ^^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0425`.
[INFO] [stderr] error: could not compile `multi-otsu`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c71b8ffcc5f7f103ce6e4fda6ef229a5e14453c3d8e3ac6cc2f16f1f7740eec4"`
[INFO] running `"docker" "rm" "-f" "c71b8ffcc5f7f103ce6e4fda6ef229a5e14453c3d8e3ac6cc2f16f1f7740eec4"`
[INFO] [stdout] c71b8ffcc5f7f103ce6e4fda6ef229a5e14453c3d8e3ac6cc2f16f1f7740eec4