[INFO] updating cached repository https://github.com/ZivxXxY/mandelbrot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 67eaa51d0024acbca386ffa5e0bc16fd206d2cfb
[INFO] checking ZivxXxY/mandelbrot against try#0ab79c4b48ad19260fa46623f452c1b403a360e8 for pr-74315
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZivxXxY%2Fmandelbrot" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ZivxXxY/mandelbrot on toolchain 0ab79c4b48ad19260fa46623f452c1b403a360e8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ZivxXxY/mandelbrot
[INFO] finished tweaking git repo https://github.com/ZivxXxY/mandelbrot
[INFO] tweaked toml for git repo https://github.com/ZivxXxY/mandelbrot written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/ZivxXxY/mandelbrot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "fetch" "--locked" "--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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 347a5508a5535d27853f890a2f5b1cd7c3f4f28c937aebf5b89e645b8e0419f1
[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" "347a5508a5535d27853f890a2f5b1cd7c3f4f28c937aebf5b89e645b8e0419f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "347a5508a5535d27853f890a2f5b1cd7c3f4f28c937aebf5b89e645b8e0419f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "347a5508a5535d27853f890a2f5b1cd7c3f4f28c937aebf5b89e645b8e0419f1", kill_on_drop: false }`
[INFO] [stdout] 347a5508a5535d27853f890a2f5b1cd7c3f4f28c937aebf5b89e645b8e0419f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3229a1b5422ec17d965458a6c9897e5d1f06efe1214e917b5a5c380cf73a9909
[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" "3229a1b5422ec17d965458a6c9897e5d1f06efe1214e917b5a5c380cf73a9909", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.43
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking num-rational v0.2.2
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking rayon v1.1.0
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking png v0.15.0
[INFO] [stderr]     Checking crossbeam v0.7.2
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking tiff v0.3.1
[INFO] [stderr]     Checking image v0.22.1
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:136:9
[INFO] [stdout]     |
[INFO] [stdout] 136 | /         crossbeam::scope(|spawner| {
[INFO] [stdout] 137 | |             for (i, band) in bands.into_iter().enumerate() {
[INFO] [stdout] 138 | |                 let top = rows_per_band * i;
[INFO] [stdout] 139 | |                 let height = band.len() / bounds.0;
[INFO] [stdout] ...   |
[INFO] [stdout] 147 | |             }
[INFO] [stdout] 148 | |         });
[INFO] [stdout]     | |___________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:136:9
[INFO] [stdout]     |
[INFO] [stdout] 136 | /         crossbeam::scope(|spawner| {
[INFO] [stdout] 137 | |             for (i, band) in bands.into_iter().enumerate() {
[INFO] [stdout] 138 | |                 let top = rows_per_band * i;
[INFO] [stdout] 139 | |                 let height = band.len() / bounds.0;
[INFO] [stdout] ...   |
[INFO] [stdout] 147 | |             }
[INFO] [stdout] 148 | |         });
[INFO] [stdout]     | |___________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.55s
[INFO] running `Command { std: "docker" "inspect" "3229a1b5422ec17d965458a6c9897e5d1f06efe1214e917b5a5c380cf73a9909", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3229a1b5422ec17d965458a6c9897e5d1f06efe1214e917b5a5c380cf73a9909", kill_on_drop: false }`
[INFO] [stdout] 3229a1b5422ec17d965458a6c9897e5d1f06efe1214e917b5a5c380cf73a9909