[INFO] fetching crate async-generator 0.0.0...
[INFO] checking async-generator-0.0.0 against beta for pr-78714
[INFO] extracting crate async-generator 0.0.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate async-generator 0.0.0 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 async-generator 0.0.0
[INFO] finished tweaking crates.io crate async-generator 0.0.0
[INFO] tweaked toml for crates.io crate async-generator 0.0.0 written to /workspace/builds/worker-5/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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 275af8c63122e92f172358b43157b10d6dc607e0049f09e0fea81193344ab66f
[INFO] running `Command { std: "docker" "start" "-a" "275af8c63122e92f172358b43157b10d6dc607e0049f09e0fea81193344ab66f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "275af8c63122e92f172358b43157b10d6dc607e0049f09e0fea81193344ab66f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "275af8c63122e92f172358b43157b10d6dc607e0049f09e0fea81193344ab66f", kill_on_drop: false }`
[INFO] [stdout] 275af8c63122e92f172358b43157b10d6dc607e0049f09e0fea81193344ab66f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] b352c8c2132bdf3205e55dbb1a1b11f0d8971beadaf878c1f6a53cc976a6a9d1
[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" "b352c8c2132bdf3205e55dbb1a1b11f0d8971beadaf878c1f6a53cc976a6a9d1", kill_on_drop: false }`
[INFO] [stderr]     Checking async-generator v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "b352c8c2132bdf3205e55dbb1a1b11f0d8971beadaf878c1f6a53cc976a6a9d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b352c8c2132bdf3205e55dbb1a1b11f0d8971beadaf878c1f6a53cc976a6a9d1", kill_on_drop: false }`
[INFO] [stdout] b352c8c2132bdf3205e55dbb1a1b11f0d8971beadaf878c1f6a53cc976a6a9d1