[INFO] cloning repository https://github.com/aleksey-orekhov/mandelbrot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aleksey-orekhov/mandelbrot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faleksey-orekhov%2Fmandelbrot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faleksey-orekhov%2Fmandelbrot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0bafb17e009d7640f185ab42a6a9e32611189024
[INFO] documenting aleksey-orekhov/mandelbrot against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faleksey-orekhov%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/aleksey-orekhov/mandelbrot on toolchain 66dfc4e010913fbed0c4ea91fc2c010004b0f441
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/aleksey-orekhov/mandelbrot
[INFO] finished tweaking git repo https://github.com/aleksey-orekhov/mandelbrot
[INFO] tweaked toml for git repo https://github.com/aleksey-orekhov/mandelbrot written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/aleksey-orekhov/mandelbrot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "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" "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@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca286cf9bce1e647544d618a1714b0c66110df5632769e480c7f4a4f32ba376b
[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" "ca286cf9bce1e647544d618a1714b0c66110df5632769e480c7f4a4f32ba376b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca286cf9bce1e647544d618a1714b0c66110df5632769e480c7f4a4f32ba376b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca286cf9bce1e647544d618a1714b0c66110df5632769e480c7f4a4f32ba376b", kill_on_drop: false }`
[INFO] [stdout] ca286cf9bce1e647544d618a1714b0c66110df5632769e480c7f4a4f32ba376b
[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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--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@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b42a755285637636af4ffe68d526f6627a77837447e933d805ca3874e8efbecb
[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" "b42a755285637636af4ffe68d526f6627a77837447e933d805ca3874e8efbecb", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.17
[INFO] [stderr]     Checking num-traits v0.1.36
[INFO] [stderr]     Checking rustc-serialize v0.3.21
[INFO] [stderr]    Compiling gcc v0.3.38
[INFO] [stderr]     Checking lzw v0.9.0
[INFO] [stderr]     Checking inflate v0.1.1
[INFO] [stderr]     Checking bitflags v0.3.3
[INFO] [stderr]     Checking color_quant v1.0.0
[INFO] [stderr]     Checking byteorder v0.4.2
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]     Checking crossbeam v0.2.10
[INFO] [stderr]     Checking gif v0.7.0
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking num-integer v0.1.32
[INFO] [stderr]    Compiling miniz-sys v0.1.7
[INFO] [stderr]     Checking num-iter v0.1.32
[INFO] [stderr]     Checking flate2 v0.2.14
[INFO] [stderr]     Checking png v0.4.3
[INFO] [stderr]     Checking num-bigint v0.1.35
[INFO] [stderr]     Checking num-complex v0.1.35
[INFO] [stderr]     Checking num-rational v0.1.35
[INFO] [stderr]     Checking num v0.1.36
[INFO] [stderr]     Checking enum_primitive v0.1.0
[INFO] [stderr]     Checking image v0.6.1
[INFO] [stderr]  Documenting mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.24s
[INFO] running `Command { std: "docker" "inspect" "b42a755285637636af4ffe68d526f6627a77837447e933d805ca3874e8efbecb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b42a755285637636af4ffe68d526f6627a77837447e933d805ca3874e8efbecb", kill_on_drop: false }`
[INFO] [stdout] b42a755285637636af4ffe68d526f6627a77837447e933d805ca3874e8efbecb