[INFO] cloning repository https://github.com/dariandzirko/obama_poster_maker
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dariandzirko/obama_poster_maker" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdariandzirko%2Fobama_poster_maker", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdariandzirko%2Fobama_poster_maker'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 38b96a7dc6bf42e4432ccf927f3c3fdcf2736de3
[INFO] building dariandzirko/obama_poster_maker against master#d59f06fc64844ec2073e5e888f7470989ef25ff9 for pr-119440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdariandzirko%2Fobama_poster_maker" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dariandzirko/obama_poster_maker on toolchain d59f06fc64844ec2073e5e888f7470989ef25ff9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d59f06fc64844ec2073e5e888f7470989ef25ff9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dariandzirko/obama_poster_maker
[INFO] finished tweaking git repo https://github.com/dariandzirko/obama_poster_maker
[INFO] tweaked toml for git repo https://github.com/dariandzirko/obama_poster_maker written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/dariandzirko/obama_poster_maker already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d59f06fc64844ec2073e5e888f7470989ef25ff9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+d59f06fc64844ec2073e5e888f7470989ef25ff9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad3929577f2d46351688461a8f63cb9ceacbecc24c661e1656d3c11e01053111
[INFO] running `Command { std: "docker" "start" "-a" "ad3929577f2d46351688461a8f63cb9ceacbecc24c661e1656d3c11e01053111", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad3929577f2d46351688461a8f63cb9ceacbecc24c661e1656d3c11e01053111", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad3929577f2d46351688461a8f63cb9ceacbecc24c661e1656d3c11e01053111", kill_on_drop: false }`
[INFO] [stdout] ad3929577f2d46351688461a8f63cb9ceacbecc24c661e1656d3c11e01053111
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+d59f06fc64844ec2073e5e888f7470989ef25ff9" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b82769849d573c46bd36065aea84c15010a94d557534cb91fcb91f21bba32846
[INFO] running `Command { std: "docker" "start" "-a" "b82769849d573c46bd36065aea84c15010a94d557534cb91fcb91f21bba32846", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling simd-adler32 v0.3.7
[INFO] [stderr]    Compiling rayon-core v1.12.0
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]    Compiling weezl v0.1.7
[INFO] [stderr]    Compiling bit_field v0.10.2
[INFO] [stderr]    Compiling bytemuck v1.14.0
[INFO] [stderr]    Compiling color_quant v1.1.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling smallvec v1.11.2
[INFO] [stderr]    Compiling lebe v0.5.2
[INFO] [stderr]    Compiling half v2.2.1
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling miniz_oxide v0.7.1
[INFO] [stderr]    Compiling zune-inflate v0.2.54
[INFO] [stderr]    Compiling fdeflate v0.3.1
[INFO] [stderr]    Compiling gif v0.12.0
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling qoi v0.4.1
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling crossbeam-deque v0.8.3
[INFO] [stderr]    Compiling flate2 v1.0.28
[INFO] [stderr]    Compiling flume v0.11.0
[INFO] [stderr]    Compiling png v0.17.10
[INFO] [stderr]    Compiling rayon v1.8.0
[INFO] [stderr]    Compiling exr v1.71.0
[INFO] [stderr]    Compiling jpeg-decoder v0.3.0
[INFO] [stderr]    Compiling tiff v0.9.0
[INFO] [stderr]    Compiling image v0.24.7
[INFO] [stderr]    Compiling obama_poster_maker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `GenericImageView`
[INFO] [stdout]  --> src/otsu.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | use image::{self, GenericImageView, GrayImage, Luma, Pixel};
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dark_pixel`
[INFO] [stdout]    --> src/otsu.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let dark_pixel = Luma([0]);
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dark_pixel`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     otsu_img.save("background_removed.png");
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let _ = otsu_img.save("background_removed.png");
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     otsu_img.save("otsu.png");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let _ = otsu_img.save("otsu.png");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Map` that must be used
[INFO] [stdout]   --> src/otsu.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | /     probabilities
[INFO] [stdout] 21 | |         .iter_mut()
[INFO] [stdout] 22 | |         .enumerate()
[INFO] [stdout] 23 | |         .map(|(i, x)| *x + (histogram[i] / sum) as f32);
[INFO] [stdout]    | |_______________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let _ = probabilities
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.11s
[INFO] running `Command { std: "docker" "inspect" "b82769849d573c46bd36065aea84c15010a94d557534cb91fcb91f21bba32846", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b82769849d573c46bd36065aea84c15010a94d557534cb91fcb91f21bba32846", kill_on_drop: false }`
[INFO] [stdout] b82769849d573c46bd36065aea84c15010a94d557534cb91fcb91f21bba32846
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+d59f06fc64844ec2073e5e888f7470989ef25ff9" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 95a554004cae398bc9624011a8df5f4bb23bfe0d4d8316399069078a266ccb94
[INFO] running `Command { std: "docker" "start" "-a" "95a554004cae398bc9624011a8df5f4bb23bfe0d4d8316399069078a266ccb94", kill_on_drop: false }`
[INFO] [stderr]    Compiling obama_poster_maker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `GenericImageView`
[INFO] [stdout]  --> src/otsu.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | use image::{self, GenericImageView, GrayImage, Luma, Pixel};
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dark_pixel`
[INFO] [stdout]    --> src/otsu.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let dark_pixel = Luma([0]);
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dark_pixel`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     otsu_img.save("background_removed.png");
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let _ = otsu_img.save("background_removed.png");
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     otsu_img.save("otsu.png");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let _ = otsu_img.save("otsu.png");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Map` that must be used
[INFO] [stdout]   --> src/otsu.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | /     probabilities
[INFO] [stdout] 21 | |         .iter_mut()
[INFO] [stdout] 22 | |         .enumerate()
[INFO] [stdout] 23 | |         .map(|(i, x)| *x + (histogram[i] / sum) as f32);
[INFO] [stdout]    | |_______________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let _ = probabilities
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "95a554004cae398bc9624011a8df5f4bb23bfe0d4d8316399069078a266ccb94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95a554004cae398bc9624011a8df5f4bb23bfe0d4d8316399069078a266ccb94", kill_on_drop: false }`
[INFO] [stdout] 95a554004cae398bc9624011a8df5f4bb23bfe0d4d8316399069078a266ccb94