[INFO] cloning repository https://github.com/CodeGradox/mandelbrot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CodeGradox/mandelbrot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCodeGradox%2Fmandelbrot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCodeGradox%2Fmandelbrot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 56b076aee82ab53cf8838e1afc9ccf5208e34d22
[INFO] checking CodeGradox/mandelbrot against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCodeGradox%2Fmandelbrot" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CodeGradox/mandelbrot on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/CodeGradox/mandelbrot
[INFO] finished tweaking git repo https://github.com/CodeGradox/mandelbrot
[INFO] tweaked toml for git repo https://github.com/CodeGradox/mandelbrot written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/CodeGradox/mandelbrot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v0.6.9
[INFO] [stderr]   Downloaded syn v0.15.18
[INFO] [stderr]   Downloaded tiff v0.2.1
[INFO] [stderr]   Downloaded num-derive v0.2.3
[INFO] [stderr]   Downloaded image v0.20.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f36462a6e03df09daaea8c78da237efe4da0139d7ea0b554e6a0edd4dd33bac6
[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" "f36462a6e03df09daaea8c78da237efe4da0139d7ea0b554e6a0edd4dd33bac6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f36462a6e03df09daaea8c78da237efe4da0139d7ea0b554e6a0edd4dd33bac6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f36462a6e03df09daaea8c78da237efe4da0139d7ea0b554e6a0edd4dd33bac6", kill_on_drop: false }`
[INFO] [stdout] f36462a6e03df09daaea8c78da237efe4da0139d7ea0b554e6a0edd4dd33bac6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0527d6f969255d824137220251a53aaf4ce26f80a8c925b0eb1a0d51629c6f19
[INFO] running `Command { std: "docker" "start" "-a" "0527d6f969255d824137220251a53aaf4ce26f80a8c925b0eb1a0d51629c6f19", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling proc-macro2 v0.4.20
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling num-derive v0.2.3
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking deflate v0.7.19
[INFO] [stderr]     Checking inflate v0.4.3
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]     Checking gif v0.10.1
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling quote v0.6.9
[INFO] [stderr]    Compiling syn v0.15.18
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]     Checking tiff v0.2.1
[INFO] [stderr]     Checking image v0.20.1
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.95s
[INFO] running `Command { std: "docker" "inspect" "0527d6f969255d824137220251a53aaf4ce26f80a8c925b0eb1a0d51629c6f19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0527d6f969255d824137220251a53aaf4ce26f80a8c925b0eb1a0d51629c6f19", kill_on_drop: false }`
[INFO] [stdout] 0527d6f969255d824137220251a53aaf4ce26f80a8c925b0eb1a0d51629c6f19