[INFO] fetching crate pro_metadata 3.0.0-rc2...
[INFO] building pro_metadata-3.0.0-rc2 against master#d5c88c22807925c189328ef9d923c5d2b11a95b8 for pr-87066-3
[INFO] extracting crate pro_metadata 3.0.0-rc2 into /workspace/builds/worker-92/source
[INFO] validating manifest of crates.io crate pro_metadata 3.0.0-rc2 on toolchain d5c88c22807925c189328ef9d923c5d2b11a95b8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pro_metadata 3.0.0-rc2
[INFO] finished tweaking crates.io crate pro_metadata 3.0.0-rc2
[INFO] tweaked toml for crates.io crate pro_metadata 3.0.0-rc2 written to /workspace/builds/worker-92/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c3fe02cdc607374aaf2098af4a8db54547248b97ff10f989e62557672cd35f7b
[INFO] running `Command { std: "docker" "start" "-a" "c3fe02cdc607374aaf2098af4a8db54547248b97ff10f989e62557672cd35f7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3fe02cdc607374aaf2098af4a8db54547248b97ff10f989e62557672cd35f7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3fe02cdc607374aaf2098af4a8db54547248b97ff10f989e62557672cd35f7b", kill_on_drop: false }`
[INFO] [stdout] c3fe02cdc607374aaf2098af4a8db54547248b97ff10f989e62557672cd35f7b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e47dab68eebdd6d53624ada3990b7fab0013cb2f614f42f4642630a1fee9a81d
[INFO] running `Command { std: "docker" "start" "-a" "e47dab68eebdd6d53624ada3990b7fab0013cb2f614f42f4642630a1fee9a81d", 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" "e47dab68eebdd6d53624ada3990b7fab0013cb2f614f42f4642630a1fee9a81d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e47dab68eebdd6d53624ada3990b7fab0013cb2f614f42f4642630a1fee9a81d", kill_on_drop: false }`
[INFO] [stdout] e47dab68eebdd6d53624ada3990b7fab0013cb2f614f42f4642630a1fee9a81d