[INFO] fetching crate grid_search 0.15.1...
[INFO] checking grid_search-0.15.1 against beta for pr-78714
[INFO] extracting crate grid_search 0.15.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate grid_search 0.15.1 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate grid_search 0.15.1
[INFO] finished tweaking crates.io crate grid_search 0.15.1
[INFO] tweaked toml for crates.io crate grid_search 0.15.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9889e77e729b4b504c8e38ba4bf08998eeaa22c3b27945f28ad6a7e74d920762
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9889e77e729b4b504c8e38ba4bf08998eeaa22c3b27945f28ad6a7e74d920762", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9889e77e729b4b504c8e38ba4bf08998eeaa22c3b27945f28ad6a7e74d920762", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9889e77e729b4b504c8e38ba4bf08998eeaa22c3b27945f28ad6a7e74d920762", kill_on_drop: false }`
[INFO] [stdout] 9889e77e729b4b504c8e38ba4bf08998eeaa22c3b27945f28ad6a7e74d920762
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5a28592b04d5488a1477e13b70cca765ece3dcff65d2fde589844df7d5dbf2dd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5a28592b04d5488a1477e13b70cca765ece3dcff65d2fde589844df7d5dbf2dd", kill_on_drop: false }`
[INFO] [stderr]     Checking best v0.13.0
[INFO] [stderr]     Checking grid_2d v0.12.5
[INFO] [stderr]     Checking direction v0.17.10
[INFO] [stderr]     Checking grid_search v0.15.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.92s
[INFO] running `Command { std: "docker" "inspect" "5a28592b04d5488a1477e13b70cca765ece3dcff65d2fde589844df7d5dbf2dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a28592b04d5488a1477e13b70cca765ece3dcff65d2fde589844df7d5dbf2dd", kill_on_drop: false }`
[INFO] [stdout] 5a28592b04d5488a1477e13b70cca765ece3dcff65d2fde589844df7d5dbf2dd