[INFO] cloning repository https://github.com/gdvalle/webchannel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gdvalle/webchannel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgdvalle%2Fwebchannel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgdvalle%2Fwebchannel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cbaba7aba42da64eae74dbfab3638df0713f63d6
[INFO] checking gdvalle/webchannel against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgdvalle%2Fwebchannel" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gdvalle/webchannel 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/gdvalle/webchannel
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/gdvalle/webchannel
[INFO] tweaked toml for git repo https://github.com/gdvalle/webchannel written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/gdvalle/webchannel 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 mimalloc v0.1.26
[INFO] [stderr]   Downloaded deadpool v0.8.0
[INFO] [stderr]   Downloaded http-api-problem v0.50.2
[INFO] [stderr]   Downloaded tokio-test v0.4.2
[INFO] [stderr]   Downloaded tokio-serde v0.4.0
[INFO] [stderr]   Downloaded libmimalloc-sys v0.1.22
[INFO] [stderr]   Downloaded tokio-core v0.1.18
[INFO] [stderr]   Downloaded tokio-serde-json v0.3.0
[INFO] [stderr]   Downloaded redis-async v0.11.0
[INFO] [stderr]   Downloaded biscuit v0.6.0-beta1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 25e7247b07020c132ddadabf38f1344fed36841e898ffbe5a3496d11da1b2d9c
[INFO] running `Command { std: "docker" "start" "-a" "25e7247b07020c132ddadabf38f1344fed36841e898ffbe5a3496d11da1b2d9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25e7247b07020c132ddadabf38f1344fed36841e898ffbe5a3496d11da1b2d9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25e7247b07020c132ddadabf38f1344fed36841e898ffbe5a3496d11da1b2d9c", kill_on_drop: false }`
[INFO] [stdout] 25e7247b07020c132ddadabf38f1344fed36841e898ffbe5a3496d11da1b2d9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 7cf9cc0568a68a17219c04ad34d8597f8207e8d71833ae9ab133bf5ccb7fc674
[INFO] running `Command { std: "docker" "start" "-a" "7cf9cc0568a68a17219c04ad34d8597f8207e8d71833ae9ab133bf5ccb7fc674", kill_on_drop: false }`
[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" "7cf9cc0568a68a17219c04ad34d8597f8207e8d71833ae9ab133bf5ccb7fc674", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cf9cc0568a68a17219c04ad34d8597f8207e8d71833ae9ab133bf5ccb7fc674", kill_on_drop: false }`
[INFO] [stdout] 7cf9cc0568a68a17219c04ad34d8597f8207e8d71833ae9ab133bf5ccb7fc674