[INFO] cloning repository https://github.com/stepperman/rusty-minder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stepperman/rusty-minder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstepperman%2Frusty-minder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstepperman%2Frusty-minder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2852410ff1b4b8a93e2b37d4cc444d3e8c9f2f62
[INFO] checking stepperman/rusty-minder against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstepperman%2Frusty-minder" "/workspace/builds/worker-31/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-31/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stepperman/rusty-minder 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/stepperman/rusty-minder
[INFO] finished tweaking git repo https://github.com/stepperman/rusty-minder
[INFO] tweaked toml for git repo https://github.com/stepperman/rusty-minder written to /workspace/builds/worker-31/source/Cargo.toml
[INFO] crate git repo https://github.com/stepperman/rusty-minder 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 webpki v0.19.1
[INFO] [stderr]   Downloaded hyper-rustls v0.16.1
[INFO] [stderr]   Downloaded security-framework v0.3.1
[INFO] [stderr]   Downloaded webpki-roots v0.16.0
[INFO] [stderr]   Downloaded generic-array v0.12.0
[INFO] [stderr]   Downloaded futures v0.1.27
[INFO] [stderr]   Downloaded tokio v0.1.19
[INFO] [stderr]   Downloaded ct-logs v0.5.1
[INFO] [stderr]   Downloaded openssl-sys v0.9.46
[INFO] [stderr]   Downloaded tokio-sync v0.1.5
[INFO] [stderr]   Downloaded reqwest v0.9.17
[INFO] [stderr]   Downloaded opaque-debug v0.2.2
[INFO] [stderr]   Downloaded hyper v0.12.28
[INFO] [stderr]   Downloaded security-framework-sys v0.3.1
[INFO] [stderr]   Downloaded serde_derive v1.0.91
[INFO] [stderr]   Downloaded serde v1.0.91
[INFO] [stderr]   Downloaded tokio-rustls v0.9.2
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.14
[INFO] [stderr]   Downloaded openssl v0.10.22
[INFO] [stderr]   Downloaded serde-xml-rs v0.3.1
[INFO] [stderr]   Downloaded unicase v2.4.0
[INFO] [stderr]   Downloaded digest v0.8.0
[INFO] [stderr]   Downloaded sct v0.5.0
[INFO] [stderr]   Downloaded tungstenite v0.6.1
[INFO] [stderr]   Downloaded rustls v0.15.2
[INFO] [stderr]   Downloaded uwl v0.3.2
[INFO] [stderr]   Downloaded ring v0.14.6
[INFO] [stderr]   Downloaded command_attr v0.1.0-rc
[INFO] [stderr]   Downloaded serenity v0.6.0-rc.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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] ef86695ddea1c625c5a70901e9202edf37e7018f954d9c20c37ec70acdfb5df0
[INFO] running `Command { std: "docker" "start" "-a" "ef86695ddea1c625c5a70901e9202edf37e7018f954d9c20c37ec70acdfb5df0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef86695ddea1c625c5a70901e9202edf37e7018f954d9c20c37ec70acdfb5df0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef86695ddea1c625c5a70901e9202edf37e7018f954d9c20c37ec70acdfb5df0", kill_on_drop: false }`
[INFO] [stdout] ef86695ddea1c625c5a70901e9202edf37e7018f954d9c20c37ec70acdfb5df0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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] b97d4998b11dd38e9fcbeeb824ad34403d2c1986ca8d232f7802efcc81569df3
[INFO] running `Command { std: "docker" "start" "-a" "b97d4998b11dd38e9fcbeeb824ad34403d2c1986ca8d232f7802efcc81569df3", 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" "b97d4998b11dd38e9fcbeeb824ad34403d2c1986ca8d232f7802efcc81569df3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b97d4998b11dd38e9fcbeeb824ad34403d2c1986ca8d232f7802efcc81569df3", kill_on_drop: false }`
[INFO] [stdout] b97d4998b11dd38e9fcbeeb824ad34403d2c1986ca8d232f7802efcc81569df3