[INFO] cloning repository https://github.com/gianmarcodonnici/mandelbrot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gianmarcodonnici/mandelbrot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgianmarcodonnici%2Fmandelbrot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgianmarcodonnici%2Fmandelbrot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 847b7530523df46aa08fa70bfc9a5da1b388cb49
[INFO] checking gianmarcodonnici/mandelbrot against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgianmarcodonnici%2Fmandelbrot" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gianmarcodonnici/mandelbrot on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gianmarcodonnici/mandelbrot
[INFO] finished tweaking git repo https://github.com/gianmarcodonnici/mandelbrot
[INFO] tweaked toml for git repo https://github.com/gianmarcodonnici/mandelbrot written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/gianmarcodonnici/mandelbrot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-4/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0222ad3e58825a053ae2238de27d4b6e18f49caf32ba1c56f5eccd5e86e0f833
[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" "0222ad3e58825a053ae2238de27d4b6e18f49caf32ba1c56f5eccd5e86e0f833", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0222ad3e58825a053ae2238de27d4b6e18f49caf32ba1c56f5eccd5e86e0f833", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0222ad3e58825a053ae2238de27d4b6e18f49caf32ba1c56f5eccd5e86e0f833", kill_on_drop: false }`
[INFO] [stdout] 0222ad3e58825a053ae2238de27d4b6e18f49caf32ba1c56f5eccd5e86e0f833
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2438cd22efceaaae098a363903f3318e253ac7beeb591449a3fe6a1f4cc6b3c
[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" "b2438cd22efceaaae098a363903f3318e253ac7beeb591449a3fe6a1f4cc6b3c", kill_on_drop: false }`
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling rayon-core v1.8.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling rayon v1.4.0
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking crossbeam-channel v0.4.3
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking png v0.15.3
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stderr]     Checking tiff v0.3.1
[INFO] [stderr]     Checking image v0.22.5
[INFO] [stderr]     Checking mandelbrot v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.17s
[INFO] running `Command { std: "docker" "inspect" "b2438cd22efceaaae098a363903f3318e253ac7beeb591449a3fe6a1f4cc6b3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2438cd22efceaaae098a363903f3318e253ac7beeb591449a3fe6a1f4cc6b3c", kill_on_drop: false }`
[INFO] [stdout] b2438cd22efceaaae098a363903f3318e253ac7beeb591449a3fe6a1f4cc6b3c