[INFO] cloning repository https://github.com/steveklabnik/rust-docs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/steveklabnik/rust-docs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteveklabnik%2Frust-docs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteveklabnik%2Frust-docs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 81abec54cc31274c288bae774989f13991ed42b9
[INFO] checking steveklabnik/rust-docs against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteveklabnik%2Frust-docs" "/workspace/builds/worker-33/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-33/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/steveklabnik/rust-docs 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/steveklabnik/rust-docs
[INFO] finished tweaking git repo https://github.com/steveklabnik/rust-docs
[INFO] tweaked toml for git repo https://github.com/steveklabnik/rust-docs written to /workspace/builds/worker-33/source/Cargo.toml
[INFO] crate git repo https://github.com/steveklabnik/rust-docs 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]     Updating git repository `https://github.com/steveklabnik/sparkles`
[INFO] [stderr]     Updating git repository `https://github.com/hyperium/hyper`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded slog-stream v1.2.0
[INFO] [stderr]   Downloaded serde_json v0.9.9
[INFO] [stderr]   Downloaded slog-extra v0.1.2
[INFO] [stderr]   Downloaded slog v1.5.2
[INFO] [stderr]   Downloaded serde v0.9.11
[INFO] [stderr]   Downloaded security-framework v0.1.12
[INFO] [stderr]   Downloaded bytes v0.4.1
[INFO] [stderr]   Downloaded openssl v0.9.9
[INFO] [stderr]   Downloaded base64 v0.4.0
[INFO] [stderr]   Downloaded handlebars v0.25.1
[INFO] [stderr]   Downloaded pest v0.3.3
[INFO] [stderr]   Downloaded mio v0.6.5
[INFO] [stderr]   Downloaded quick-error v1.1.0
[INFO] [stderr]   Downloaded hyper v0.10.5
[INFO] [stderr]   Downloaded slog-term v1.5.0
[INFO] [stderr]   Downloaded tokio-core v0.1.6
[INFO] [stderr]   Downloaded openssl-sys v0.9.9
[INFO] [stderr]   Downloaded security-framework-sys v0.1.12
[INFO] [stderr]   Downloaded futures v0.1.11
[INFO] [stderr]   Downloaded tokio-io v0.1.0
[INFO] [stderr]   Downloaded futures-cpupool v0.1.4
[INFO] [stderr]   Downloaded lazy_static v0.2.4
[INFO] [stderr]   Downloaded native-tls v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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] c0ae9e5daac724bfe0b0f236ec80c78c7ab13365b3eda439706b0a379a960076
[INFO] running `Command { std: "docker" "start" "-a" "c0ae9e5daac724bfe0b0f236ec80c78c7ab13365b3eda439706b0a379a960076", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0ae9e5daac724bfe0b0f236ec80c78c7ab13365b3eda439706b0a379a960076", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0ae9e5daac724bfe0b0f236ec80c78c7ab13365b3eda439706b0a379a960076", kill_on_drop: false }`
[INFO] [stdout] c0ae9e5daac724bfe0b0f236ec80c78c7ab13365b3eda439706b0a379a960076
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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] 7efd9ac2ad68d4fbc4981082f64a57ca70af6e3c1200d34c1ce54df714550ed2
[INFO] running `Command { std: "docker" "start" "-a" "7efd9ac2ad68d4fbc4981082f64a57ca70af6e3c1200d34c1ce54df714550ed2", 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" "7efd9ac2ad68d4fbc4981082f64a57ca70af6e3c1200d34c1ce54df714550ed2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7efd9ac2ad68d4fbc4981082f64a57ca70af6e3c1200d34c1ce54df714550ed2", kill_on_drop: false }`
[INFO] [stdout] 7efd9ac2ad68d4fbc4981082f64a57ca70af6e3c1200d34c1ce54df714550ed2