[INFO] cloning repository https://github.com/CurtisMac/rustlings_course
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CurtisMac/rustlings_course" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCurtisMac%2Frustlings_course", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCurtisMac%2Frustlings_course'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c8db0bfaf8ec709a4485bef477fa6b12fc1e6a6e
[INFO] checking CurtisMac/rustlings_course against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCurtisMac%2Frustlings_course" "/workspace/builds/worker-83/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-83/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CurtisMac/rustlings_course on toolchain 39e1293fce4b650061e85dda88aa428f726a8444
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/CurtisMac/rustlings_course
[INFO] finished tweaking git repo https://github.com/CurtisMac/rustlings_course
[INFO] tweaked toml for git repo https://github.com/CurtisMac/rustlings_course written to /workspace/builds/worker-83/source/Cargo.toml
[INFO] crate git repo https://github.com/CurtisMac/rustlings_course already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded argh_shared v0.1.4
[INFO] [stderr]   Downloaded argh v0.1.4
[INFO] [stderr]   Downloaded argh_derive v0.1.4
[INFO] [stderr]   Downloaded indicatif v0.10.3
[INFO] [stderr]   Downloaded termios v0.3.3
[INFO] [stderr]   Downloaded console v0.7.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0878b0ec4311bd7f966829b5429950e910e84e1e50ba8ab5731b0cf968636d31
[INFO] running `Command { std: "docker" "start" "-a" "0878b0ec4311bd7f966829b5429950e910e84e1e50ba8ab5731b0cf968636d31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0878b0ec4311bd7f966829b5429950e910e84e1e50ba8ab5731b0cf968636d31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0878b0ec4311bd7f966829b5429950e910e84e1e50ba8ab5731b0cf968636d31", kill_on_drop: false }`
[INFO] [stdout] 0878b0ec4311bd7f966829b5429950e910e84e1e50ba8ab5731b0cf968636d31
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3243d1754433dd584bb9afb23b9d85e3e6e325f338b180948bf8bcf35943cca7
[INFO] running `Command { std: "docker" "start" "-a" "3243d1754433dd584bb9afb23b9d85e3e6e325f338b180948bf8bcf35943cca7", kill_on_drop: false }`
[INFO] [stderr] error: failed to create jobserver
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to increase jobserver pipe capacity from 4096 to 8192; jobserver otherwise might deadlock
[INFO] running `Command { std: "docker" "inspect" "3243d1754433dd584bb9afb23b9d85e3e6e325f338b180948bf8bcf35943cca7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3243d1754433dd584bb9afb23b9d85e3e6e325f338b180948bf8bcf35943cca7", kill_on_drop: false }`
[INFO] [stdout] 3243d1754433dd584bb9afb23b9d85e3e6e325f338b180948bf8bcf35943cca7