[INFO] cloning repository https://github.com/natpen/mildril
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/natpen/mildril" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnatpen%2Fmildril", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnatpen%2Fmildril'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b599c8680a34597d56432a3096f5974252a0972e
[INFO] checking natpen/mildril against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnatpen%2Fmildril" "/workspace/builds/worker-19/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-19/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/natpen/mildril on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/natpen/mildril
[INFO] finished tweaking git repo https://github.com/natpen/mildril
[INFO] tweaked toml for git repo https://github.com/natpen/mildril written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] crate git repo https://github.com/natpen/mildril already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "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 futf v0.1.2
[INFO] [stderr]   Downloaded tendril v0.2.3
[INFO] [stderr]   Downloaded gcc v0.3.37
[INFO] [stderr]   Downloaded openssl-verify v0.1.0
[INFO] [stderr]   Downloaded phf v0.7.17
[INFO] [stderr]   Downloaded phf_codegen v0.7.17
[INFO] [stderr]   Downloaded pnacl-build-helper v1.4.10
[INFO] [stderr]   Downloaded phf_generator v0.7.17
[INFO] [stderr]   Downloaded serde v0.8.15
[INFO] [stderr]   Downloaded string_cache v0.2.29
[INFO] [stderr]   Downloaded quote v0.3.3
[INFO] [stderr]   Downloaded httparse v1.1.2
[INFO] [stderr]   Downloaded syn v0.9.2
[INFO] [stderr]   Downloaded pkg-config v0.3.8
[INFO] [stderr]   Downloaded mac v0.0.2
[INFO] [stderr]   Downloaded url v1.2.2
[INFO] [stderr]   Downloaded matches v0.1.3
[INFO] [stderr]   Downloaded phf_shared v0.7.17
[INFO] [stderr]   Downloaded hyper v0.9.10
[INFO] [stderr]   Downloaded utf-8 v0.6.0
[INFO] [stderr]   Downloaded debug_unreachable v0.1.1
[INFO] [stderr]   Downloaded html5ever v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7032a19a9bb9451f3965183e1c266f6c1c3492cdbb80ae29ea604b1fb24cdcaf
[INFO] running `Command { std: "docker" "start" "-a" "7032a19a9bb9451f3965183e1c266f6c1c3492cdbb80ae29ea604b1fb24cdcaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7032a19a9bb9451f3965183e1c266f6c1c3492cdbb80ae29ea604b1fb24cdcaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7032a19a9bb9451f3965183e1c266f6c1c3492cdbb80ae29ea604b1fb24cdcaf", kill_on_drop: false }`
[INFO] [stdout] 7032a19a9bb9451f3965183e1c266f6c1c3492cdbb80ae29ea604b1fb24cdcaf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40f061d3af15dcafe16e06ec896da46b772bac6fa8d4469a460ba6c8961ae939
[INFO] running `Command { std: "docker" "start" "-a" "40f061d3af15dcafe16e06ec896da46b772bac6fa8d4469a460ba6c8961ae939", 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" "40f061d3af15dcafe16e06ec896da46b772bac6fa8d4469a460ba6c8961ae939", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40f061d3af15dcafe16e06ec896da46b772bac6fa8d4469a460ba6c8961ae939", kill_on_drop: false }`
[INFO] [stdout] 40f061d3af15dcafe16e06ec896da46b772bac6fa8d4469a460ba6c8961ae939