[INFO] cloning repository https://github.com/oofsauce/rust-video
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/oofsauce/rust-video" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foofsauce%2Frust-video", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foofsauce%2Frust-video'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b146bdc7d29a529b7cd14da21a0c9d4d9d5f0633
[INFO] testing oofsauce/rust-video against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foofsauce%2Frust-video" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/oofsauce/rust-video on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/oofsauce/rust-video
[INFO] finished tweaking git repo https://github.com/oofsauce/rust-video
[INFO] tweaked toml for git repo https://github.com/oofsauce/rust-video written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/oofsauce/rust-video already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e5ba29397a6ba6b3c31f039f9380f3924258ceebdd390219ae7ba591c055df4b
[INFO] running `Command { std: "docker" "start" "-a" "e5ba29397a6ba6b3c31f039f9380f3924258ceebdd390219ae7ba591c055df4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e5ba29397a6ba6b3c31f039f9380f3924258ceebdd390219ae7ba591c055df4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5ba29397a6ba6b3c31f039f9380f3924258ceebdd390219ae7ba591c055df4b", kill_on_drop: false }`
[INFO] [stdout] e5ba29397a6ba6b3c31f039f9380f3924258ceebdd390219ae7ba591c055df4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e3acd5ae6d79d4390e96d0982a96d2a271de5872084a2422d88b63d39e7f5607
[INFO] running `Command { std: "docker" "start" "-a" "e3acd5ae6d79d4390e96d0982a96d2a271de5872084a2422d88b63d39e7f5607", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling coz v0.1.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling rust-video v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `render::Renderable`
[INFO] [stdout]  --> src/framebuffer.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{color::{Color, RGB}, render::Renderable};
[INFO] [stdout]   |                                  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FrameBuffer`
[INFO] [stdout]  --> src/render/mod.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::framebuffer::{FrameBuffer, PPM};
[INFO] [stdout]   |                          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FrameBuffer`
[INFO] [stdout]  --> src/render/fill.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::framebuffer::{FrameBuffer, PPM};
[INFO] [stdout]   |                          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Renderable`
[INFO] [stdout]  --> src/render/fill.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::Renderable;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FrameBuffer`
[INFO] [stdout]  --> src/render/dot.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::framebuffer::{FrameBuffer, PPM};
[INFO] [stdout]   |                          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Renderable`
[INFO] [stdout]  --> src/render/dot.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::Renderable;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RGB`
[INFO] [stdout]  --> src/render/line.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::color::{Color, RGB};
[INFO] [stdout]   |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FrameBuffer`
[INFO] [stdout]  --> src/render/line.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::framebuffer::{FrameBuffer, PPM};
[INFO] [stdout]   |                          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Renderable`
[INFO] [stdout]  --> src/render/line.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::Renderable;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::prelude`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use rand::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rng`
[INFO] [stdout]   --> src/main.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut rng = rand::thread_rng();
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut rng = rand::thread_rng();
[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: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.43s
[INFO] running `Command { std: "docker" "inspect" "e3acd5ae6d79d4390e96d0982a96d2a271de5872084a2422d88b63d39e7f5607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3acd5ae6d79d4390e96d0982a96d2a271de5872084a2422d88b63d39e7f5607", kill_on_drop: false }`
[INFO] [stdout] e3acd5ae6d79d4390e96d0982a96d2a271de5872084a2422d88b63d39e7f5607
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d02db210bce3ad2cff491f7765c20c398b3dc4c9ebce8f58260a8cb06f6812e1
[INFO] running `Command { std: "docker" "start" "-a" "d02db210bce3ad2cff491f7765c20c398b3dc4c9ebce8f58260a8cb06f6812e1", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-video v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `render::Renderable`
[INFO] [stdout]  --> src/framebuffer.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{color::{Color, RGB}, render::Renderable};
[INFO] [stdout]   |                                  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FrameBuffer`
[INFO] [stdout]  --> src/render/mod.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::framebuffer::{FrameBuffer, PPM};
[INFO] [stdout]   |                          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FrameBuffer`
[INFO] [stdout]  --> src/render/fill.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::framebuffer::{FrameBuffer, PPM};
[INFO] [stdout]   |                          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Renderable`
[INFO] [stdout]  --> src/render/fill.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::Renderable;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FrameBuffer`
[INFO] [stdout]  --> src/render/dot.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::framebuffer::{FrameBuffer, PPM};
[INFO] [stdout]   |                          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Renderable`
[INFO] [stdout]  --> src/render/dot.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::Renderable;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RGB`
[INFO] [stdout]  --> src/render/line.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::color::{Color, RGB};
[INFO] [stdout]   |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FrameBuffer`
[INFO] [stdout]  --> src/render/line.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::framebuffer::{FrameBuffer, PPM};
[INFO] [stdout]   |                          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Renderable`
[INFO] [stdout]  --> src/render/line.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::Renderable;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::prelude`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use rand::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rng`
[INFO] [stdout]   --> src/main.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut rng = rand::thread_rng();
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut rng = rand::thread_rng();
[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: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.35s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_video-5c5a20a627232726)
[INFO] running `Command { std: "docker" "inspect" "d02db210bce3ad2cff491f7765c20c398b3dc4c9ebce8f58260a8cb06f6812e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d02db210bce3ad2cff491f7765c20c398b3dc4c9ebce8f58260a8cb06f6812e1", kill_on_drop: false }`
[INFO] [stdout] d02db210bce3ad2cff491f7765c20c398b3dc4c9ebce8f58260a8cb06f6812e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] cfc5f224e7d28f0cf49b63b6125e3058e017ab2125c46d0cf9dc34e2c3dafaad
[INFO] running `Command { std: "docker" "start" "-a" "cfc5f224e7d28f0cf49b63b6125e3058e017ab2125c46d0cf9dc34e2c3dafaad", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `render::Renderable`
[INFO] [stderr]  --> src/framebuffer.rs:1:34
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::{color::{Color, RGB}, render::Renderable};
[INFO] [stderr]   |                                  ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `FrameBuffer`
[INFO] [stderr]  --> src/render/mod.rs:2:26
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::framebuffer::{FrameBuffer, PPM};
[INFO] [stderr]   |                          ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `FrameBuffer`
[INFO] [stderr]  --> src/render/fill.rs:2:26
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::framebuffer::{FrameBuffer, PPM};
[INFO] [stderr]   |                          ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::Renderable`
[INFO] [stderr]  --> src/render/fill.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::Renderable;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `FrameBuffer`
[INFO] [stderr]  --> src/render/dot.rs:2:26
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::framebuffer::{FrameBuffer, PPM};
[INFO] [stderr]   |                          ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::Renderable`
[INFO] [stderr]  --> src/render/dot.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::Renderable;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `RGB`
[INFO] [stderr]  --> src/render/line.rs:1:27
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::color::{Color, RGB};
[INFO] [stderr]   |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `FrameBuffer`
[INFO] [stderr]  --> src/render/line.rs:2:26
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::framebuffer::{FrameBuffer, PPM};
[INFO] [stderr]   |                          ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::Renderable`
[INFO] [stderr]  --> src/render/line.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::Renderable;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rand::prelude`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use rand::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rng`
[INFO] [stderr]   --> src/main.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let mut rng = rand::thread_rng();
[INFO] [stderr]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let mut rng = rand::thread_rng();
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-video` (bin "rust-video" test) generated 12 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_video-5c5a20a627232726)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "cfc5f224e7d28f0cf49b63b6125e3058e017ab2125c46d0cf9dc34e2c3dafaad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cfc5f224e7d28f0cf49b63b6125e3058e017ab2125c46d0cf9dc34e2c3dafaad", kill_on_drop: false }`
[INFO] [stdout] cfc5f224e7d28f0cf49b63b6125e3058e017ab2125c46d0cf9dc34e2c3dafaad