[INFO] cloning repository https://github.com/post-rex/kobold
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/post-rex/kobold" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpost-rex%2Fkobold", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpost-rex%2Fkobold'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8a6da4579dd4d2eeb2203d1780710b067a905387
[INFO] checking post-rex/kobold against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpost-rex%2Fkobold" "/workspace/builds/worker-51/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-51/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/post-rex/kobold 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/post-rex/kobold
[INFO] finished tweaking git repo https://github.com/post-rex/kobold
[INFO] tweaked toml for git repo https://github.com/post-rex/kobold written to /workspace/builds/worker-51/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 redis-async v0.6.6
[INFO] [stderr]   Downloaded actix-redis v0.9.2
[INFO] [stderr]   Downloaded askalono v0.4.3
[INFO] [stderr]   Downloaded rpmalloc v0.2.2
[INFO] [stderr]   Downloaded spdx v0.3.6
[INFO] [stderr]   Downloaded license v1.1.10
[INFO] [stderr]   Downloaded cfg-expr v0.5.1
[INFO] [stderr]   Downloaded krates v0.5.0
[INFO] [stderr]   Downloaded rpmalloc-sys v0.2.2+1.4.1
[INFO] [stderr]   Downloaded cargo-about v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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] 191e6108c3b60e13bf3634f472008a8a201807333d2eab6c4f4030db15856d10
[INFO] running `Command { std: "docker" "start" "-a" "191e6108c3b60e13bf3634f472008a8a201807333d2eab6c4f4030db15856d10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "191e6108c3b60e13bf3634f472008a8a201807333d2eab6c4f4030db15856d10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "191e6108c3b60e13bf3634f472008a8a201807333d2eab6c4f4030db15856d10", kill_on_drop: false }`
[INFO] [stdout] 191e6108c3b60e13bf3634f472008a8a201807333d2eab6c4f4030db15856d10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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] 90faff48230a49bd82afdf3c68607a21d8de1795aa9168e8f9288d48d902a7fd
[INFO] running `Command { std: "docker" "start" "-a" "90faff48230a49bd82afdf3c68607a21d8de1795aa9168e8f9288d48d902a7fd", 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" "90faff48230a49bd82afdf3c68607a21d8de1795aa9168e8f9288d48d902a7fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90faff48230a49bd82afdf3c68607a21d8de1795aa9168e8f9288d48d902a7fd", kill_on_drop: false }`
[INFO] [stdout] 90faff48230a49bd82afdf3c68607a21d8de1795aa9168e8f9288d48d902a7fd