[INFO] cloning repository https://github.com/RustStudy/mandelbrot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RustStudy/mandelbrot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRustStudy%2Fmandelbrot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRustStudy%2Fmandelbrot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 56b81246fde731a38f6d0d5ac1d70e56f274d7be
[INFO] checking RustStudy/mandelbrot against try#7b3565da729099dbe807466fcd118fb2815986e0 for pr-81789
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRustStudy%2Fmandelbrot" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RustStudy/mandelbrot on toolchain 7b3565da729099dbe807466fcd118fb2815986e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/RustStudy/mandelbrot
[INFO] finished tweaking git repo https://github.com/RustStudy/mandelbrot
[INFO] tweaked toml for git repo https://github.com/RustStudy/mandelbrot written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/RustStudy/mandelbrot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded deflate v0.7.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3a2fa8d98e4cb2d2989b2d3103042fda3a72cc083880196d17167bfe0864ebe2
[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" "3a2fa8d98e4cb2d2989b2d3103042fda3a72cc083880196d17167bfe0864ebe2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a2fa8d98e4cb2d2989b2d3103042fda3a72cc083880196d17167bfe0864ebe2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a2fa8d98e4cb2d2989b2d3103042fda3a72cc083880196d17167bfe0864ebe2", kill_on_drop: false }`
[INFO] [stdout] 3a2fa8d98e4cb2d2989b2d3103042fda3a72cc083880196d17167bfe0864ebe2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "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] 88f5ba22ca58b564ad7fd471d9c9a5cb720ecf94c2b908538f66cd0ebe33a84d
[INFO] running `Command { std: "docker" "start" "-a" "88f5ba22ca58b564ad7fd471d9c9a5cb720ecf94c2b908538f66cd0ebe33a84d", kill_on_drop: false }`
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]     Checking crossbeam v0.2.10
[INFO] [stderr]     Checking deflate v0.7.13
[INFO] [stderr]     Checking rayon v0.8.2
[INFO] [stderr]     Checking gif v0.9.2
[INFO] [stderr]     Checking png v0.7.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.13
[INFO] [stderr]     Checking num-bigint v0.1.39
[INFO] [stderr]     Checking num-complex v0.1.38
[INFO] [stderr]     Checking num-rational v0.1.38
[INFO] [stderr]     Checking image v0.13.0
[INFO] [stderr]     Checking num v0.1.39
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.19s
[INFO] running `Command { std: "docker" "inspect" "88f5ba22ca58b564ad7fd471d9c9a5cb720ecf94c2b908538f66cd0ebe33a84d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88f5ba22ca58b564ad7fd471d9c9a5cb720ecf94c2b908538f66cd0ebe33a84d", kill_on_drop: false }`
[INFO] [stdout] 88f5ba22ca58b564ad7fd471d9c9a5cb720ecf94c2b908538f66cd0ebe33a84d