[INFO] fetching crate futures-sink-preview 0.3.0-alpha.19...
[INFO] checking futures-sink-preview-0.3.0-alpha.19 against beta for pr-78714
[INFO] extracting crate futures-sink-preview 0.3.0-alpha.19 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate futures-sink-preview 0.3.0-alpha.19 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 futures-sink-preview 0.3.0-alpha.19
[INFO] finished tweaking crates.io crate futures-sink-preview 0.3.0-alpha.19
[INFO] tweaked toml for crates.io crate futures-sink-preview 0.3.0-alpha.19 written to /workspace/builds/worker-14/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] 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" "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] f85576e0e16fe556163cd8c145debf0658b604597d852638618e1701b9684a67
[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" "f85576e0e16fe556163cd8c145debf0658b604597d852638618e1701b9684a67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f85576e0e16fe556163cd8c145debf0658b604597d852638618e1701b9684a67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f85576e0e16fe556163cd8c145debf0658b604597d852638618e1701b9684a67", kill_on_drop: false }`
[INFO] [stdout] f85576e0e16fe556163cd8c145debf0658b604597d852638618e1701b9684a67
[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" "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] ac01262dbd843eb4b3de6a4f758a4a14fea9daea70780f809a1cbe52f6f8680d
[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" "ac01262dbd843eb4b3de6a4f758a4a14fea9daea70780f809a1cbe52f6f8680d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "ac01262dbd843eb4b3de6a4f758a4a14fea9daea70780f809a1cbe52f6f8680d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac01262dbd843eb4b3de6a4f758a4a14fea9daea70780f809a1cbe52f6f8680d", kill_on_drop: false }`
[INFO] [stdout] ac01262dbd843eb4b3de6a4f758a4a14fea9daea70780f809a1cbe52f6f8680d