[INFO] cloning repository https://github.com/pnathan/signifier
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pnathan/signifier" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpnathan%2Fsignifier", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpnathan%2Fsignifier'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c7d4b4fa772fd1e301901b453dc81e0cac60f3ce
[INFO] checking pnathan/signifier against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpnathan%2Fsignifier" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pnathan/signifier 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/pnathan/signifier
[INFO] finished tweaking git repo https://github.com/pnathan/signifier
[INFO] tweaked toml for git repo https://github.com/pnathan/signifier written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/pnathan/signifier 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 serde_derive v0.9.13
[INFO] [stderr]   Downloaded semver v0.5.1
[INFO] [stderr]   Downloaded semver-parser v0.6.2
[INFO] [stderr]   Downloaded lazy_static v0.2.6
[INFO] [stderr]   Downloaded num_cpus v1.3.0
[INFO] [stderr]   Downloaded mime v0.2.3
[INFO] [stderr]   Downloaded log v0.3.7
[INFO] [stderr]   Downloaded syn v0.11.10
[INFO] [stderr]   Downloaded rustc-serialize v0.3.23
[INFO] [stderr]   Downloaded quick-error v1.1.0
[INFO] [stderr]   Downloaded idna v0.1.1
[INFO] [stderr]   Downloaded hyper v0.10.7
[INFO] [stderr]   Downloaded serde v0.9.13
[INFO] [stderr]   Downloaded rusted_cypher v1.0.0
[INFO] [stderr]   Downloaded flame v0.1.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 47932eb46cec3587c4c4839be2a589129ac8f174a24a63d42a3de62b671bbeef
[INFO] running `Command { std: "docker" "start" "-a" "47932eb46cec3587c4c4839be2a589129ac8f174a24a63d42a3de62b671bbeef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47932eb46cec3587c4c4839be2a589129ac8f174a24a63d42a3de62b671bbeef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47932eb46cec3587c4c4839be2a589129ac8f174a24a63d42a3de62b671bbeef", kill_on_drop: false }`
[INFO] [stdout] 47932eb46cec3587c4c4839be2a589129ac8f174a24a63d42a3de62b671bbeef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] f54ad4032db2e6f8ad33dce1423743a37ec53d385e7b567d17d495535f41fcae
[INFO] running `Command { std: "docker" "start" "-a" "f54ad4032db2e6f8ad33dce1423743a37ec53d385e7b567d17d495535f41fcae", 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" "f54ad4032db2e6f8ad33dce1423743a37ec53d385e7b567d17d495535f41fcae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f54ad4032db2e6f8ad33dce1423743a37ec53d385e7b567d17d495535f41fcae", kill_on_drop: false }`
[INFO] [stdout] f54ad4032db2e6f8ad33dce1423743a37ec53d385e7b567d17d495535f41fcae