[INFO] cloning repository https://github.com/gregmulvaney/undercat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gregmulvaney/undercat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgregmulvaney%2Fundercat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgregmulvaney%2Fundercat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 84fdbc242fafac88efa5033d583309f0f655ea15
[INFO] checking gregmulvaney/undercat against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgregmulvaney%2Fundercat" "/workspace/builds/worker-37/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-37/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gregmulvaney/undercat 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/gregmulvaney/undercat
[INFO] finished tweaking git repo https://github.com/gregmulvaney/undercat
[INFO] tweaked toml for git repo https://github.com/gregmulvaney/undercat written to /workspace/builds/worker-37/source/Cargo.toml
[INFO] crate git repo https://github.com/gregmulvaney/undercat 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 actix-service v2.0.0
[INFO] [stderr]   Downloaded actix-server v2.0.0-beta.5
[INFO] [stderr]   Downloaded actix-macros v0.2.1
[INFO] [stderr]   Downloaded webview-sys v0.6.2
[INFO] [stderr]   Downloaded actix-http v3.0.0-beta.6
[INFO] [stderr]   Downloaded actix-web v4.0.0-beta.6
[INFO] [stderr]   Downloaded actix-codec v0.4.0
[INFO] [stderr]   Downloaded tinyfiledialogs v3.8.3
[INFO] [stderr]   Downloaded boxfnonce v0.1.1
[INFO] [stderr]   Downloaded web-view v0.7.3
[INFO] [stderr]   Downloaded webkit2gtk-sys v0.12.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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] ad90affee7c0d4c32cfd7ee5e7a422fc280d0f2765ef40cc6ca0ac1d01672bc5
[INFO] running `Command { std: "docker" "start" "-a" "ad90affee7c0d4c32cfd7ee5e7a422fc280d0f2765ef40cc6ca0ac1d01672bc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad90affee7c0d4c32cfd7ee5e7a422fc280d0f2765ef40cc6ca0ac1d01672bc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad90affee7c0d4c32cfd7ee5e7a422fc280d0f2765ef40cc6ca0ac1d01672bc5", kill_on_drop: false }`
[INFO] [stdout] ad90affee7c0d4c32cfd7ee5e7a422fc280d0f2765ef40cc6ca0ac1d01672bc5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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] 4a27fa2f120c6e1a723e0b3ef26d2a74935a236aafd7fa8f69a2215e3c314913
[INFO] running `Command { std: "docker" "start" "-a" "4a27fa2f120c6e1a723e0b3ef26d2a74935a236aafd7fa8f69a2215e3c314913", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "4a27fa2f120c6e1a723e0b3ef26d2a74935a236aafd7fa8f69a2215e3c314913", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a27fa2f120c6e1a723e0b3ef26d2a74935a236aafd7fa8f69a2215e3c314913", kill_on_drop: false }`
[INFO] [stdout] 4a27fa2f120c6e1a723e0b3ef26d2a74935a236aafd7fa8f69a2215e3c314913