[INFO] cloning repository https://github.com/dcourv/fractal_visualizer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dcourv/fractal_visualizer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdcourv%2Ffractal_visualizer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdcourv%2Ffractal_visualizer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 355b24adffb72d25d84f93cedff65314a7559ae3
[INFO] testing dcourv/fractal_visualizer 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%2Fdcourv%2Ffractal_visualizer" "/workspace/builds/worker-21/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-21/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dcourv/fractal_visualizer 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/dcourv/fractal_visualizer
[INFO] finished tweaking git repo https://github.com/dcourv/fractal_visualizer
[INFO] tweaked toml for git repo https://github.com/dcourv/fractal_visualizer written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] crate git repo https://github.com/dcourv/fractal_visualizer 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-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] 4cf9ab924a07024de37c5645a3d805b7e29ad390bf31c92de095a50a97d684c1
[INFO] running `Command { std: "docker" "start" "-a" "4cf9ab924a07024de37c5645a3d805b7e29ad390bf31c92de095a50a97d684c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4cf9ab924a07024de37c5645a3d805b7e29ad390bf31c92de095a50a97d684c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cf9ab924a07024de37c5645a3d805b7e29ad390bf31c92de095a50a97d684c1", kill_on_drop: false }`
[INFO] [stdout] 4cf9ab924a07024de37c5645a3d805b7e29ad390bf31c92de095a50a97d684c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] 63844b4c02b7de18bcd6c9ea71ce94e14e074c083d708e6b4ba85ff8791e543f
[INFO] running `Command { std: "docker" "start" "-a" "63844b4c02b7de18bcd6c9ea71ce94e14e074c083d708e6b4ba85ff8791e543f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling x11-dl v2.18.4
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling minifb v0.15.1
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling raw-window-handle v0.3.3
[INFO] [stderr]    Compiling mandlebrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:287:8
[INFO] [stdout]     |
[INFO] [stdout] 287 |             for y in 0..HEIGHT {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:289:9
[INFO] [stdout]     |
[INFO] [stdout] 289 |                 for x in 0..WIDTH {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.48s
[INFO] running `Command { std: "docker" "inspect" "63844b4c02b7de18bcd6c9ea71ce94e14e074c083d708e6b4ba85ff8791e543f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63844b4c02b7de18bcd6c9ea71ce94e14e074c083d708e6b4ba85ff8791e543f", kill_on_drop: false }`
[INFO] [stdout] 63844b4c02b7de18bcd6c9ea71ce94e14e074c083d708e6b4ba85ff8791e543f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] be15733bdc5c6c7dd4926f4895c2b94aaa0ac0226cbd018d3b3879e11e82d68c
[INFO] running `Command { std: "docker" "start" "-a" "be15733bdc5c6c7dd4926f4895c2b94aaa0ac0226cbd018d3b3879e11e82d68c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling mandlebrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:287:8
[INFO] [stdout]     |
[INFO] [stdout] 287 |             for y in 0..HEIGHT {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:289:9
[INFO] [stdout]     |
[INFO] [stdout] 289 |                 for x in 0..WIDTH {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 32.81s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/mandlebrot-981fbaa471f938e3)
[INFO] running `Command { std: "docker" "inspect" "be15733bdc5c6c7dd4926f4895c2b94aaa0ac0226cbd018d3b3879e11e82d68c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be15733bdc5c6c7dd4926f4895c2b94aaa0ac0226cbd018d3b3879e11e82d68c", kill_on_drop: false }`
[INFO] [stdout] be15733bdc5c6c7dd4926f4895c2b94aaa0ac0226cbd018d3b3879e11e82d68c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] e9597e9a0870fcfd29f0f323148f67254356be83a59914be0c7f39fcec9c823e
[INFO] running `Command { std: "docker" "start" "-a" "e9597e9a0870fcfd29f0f323148f67254356be83a59914be0c7f39fcec9c823e", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]    --> src/main.rs:287:8
[INFO] [stderr]     |
[INFO] [stderr] 287 |             for y in 0..HEIGHT {
[INFO] [stderr]     |                 ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/main.rs:289:9
[INFO] [stderr]     |
[INFO] [stderr] 289 |                 for x in 0..WIDTH {
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: `mandlebrot` (bin "mandlebrot" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/mandlebrot-981fbaa471f938e3)
[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" "e9597e9a0870fcfd29f0f323148f67254356be83a59914be0c7f39fcec9c823e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9597e9a0870fcfd29f0f323148f67254356be83a59914be0c7f39fcec9c823e", kill_on_drop: false }`
[INFO] [stdout] e9597e9a0870fcfd29f0f323148f67254356be83a59914be0c7f39fcec9c823e