[INFO] fetching crate libmdns 0.6.1...
[INFO] checking libmdns-0.6.1 against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] extracting crate libmdns 0.6.1 into /workspace/builds/worker-35/source
[INFO] validating manifest of crates.io crate libmdns 0.6.1 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 crates.io crate libmdns 0.6.1
[INFO] finished tweaking crates.io crate libmdns 0.6.1
[INFO] tweaked toml for crates.io crate libmdns 0.6.1 written to /workspace/builds/worker-35/source/Cargo.toml
[INFO] crate crates.io crate libmdns 0.6.1 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 futures-macro v0.3.7
[INFO] [stderr]   Downloaded futures-task v0.3.7
[INFO] [stderr]   Downloaded futures-util v0.3.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/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] e445e4c7f21f8d8468e1ddd4ad2db60f8711fd9a0d8d08377f72e971d410968d
[INFO] running `Command { std: "docker" "start" "-a" "e445e4c7f21f8d8468e1ddd4ad2db60f8711fd9a0d8d08377f72e971d410968d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e445e4c7f21f8d8468e1ddd4ad2db60f8711fd9a0d8d08377f72e971d410968d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e445e4c7f21f8d8468e1ddd4ad2db60f8711fd9a0d8d08377f72e971d410968d", kill_on_drop: false }`
[INFO] [stdout] e445e4c7f21f8d8468e1ddd4ad2db60f8711fd9a0d8d08377f72e971d410968d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/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] 76c1eab4e92319628defb33465316a883e3135c3d73917c474ffdf01c715e628
[INFO] running `Command { std: "docker" "start" "-a" "76c1eab4e92319628defb33465316a883e3135c3d73917c474ffdf01c715e628", 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] 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" "76c1eab4e92319628defb33465316a883e3135c3d73917c474ffdf01c715e628", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76c1eab4e92319628defb33465316a883e3135c3d73917c474ffdf01c715e628", kill_on_drop: false }`
[INFO] [stdout] 76c1eab4e92319628defb33465316a883e3135c3d73917c474ffdf01c715e628