[INFO] fetching crate rc-writer 1.1.8...
[INFO] checking rc-writer-1.1.8 against beta for pr-78714
[INFO] extracting crate rc-writer 1.1.8 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate rc-writer 1.1.8 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 rc-writer 1.1.8
[INFO] finished tweaking crates.io crate rc-writer 1.1.8
[INFO] tweaked toml for crates.io crate rc-writer 1.1.8 written to /workspace/builds/worker-6/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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 2066fb9c5f91a72504b3ef9762cf349af8ce80f7821545a0ef56002283a0d976
[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" "2066fb9c5f91a72504b3ef9762cf349af8ce80f7821545a0ef56002283a0d976", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2066fb9c5f91a72504b3ef9762cf349af8ce80f7821545a0ef56002283a0d976", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2066fb9c5f91a72504b3ef9762cf349af8ce80f7821545a0ef56002283a0d976", kill_on_drop: false }`
[INFO] [stdout] 2066fb9c5f91a72504b3ef9762cf349af8ce80f7821545a0ef56002283a0d976
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 5a74d36b27d2c8b55fa586b8661714327ea66e34f4888a5225e2cb550af50fbb
[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" "5a74d36b27d2c8b55fa586b8661714327ea66e34f4888a5225e2cb550af50fbb", kill_on_drop: false }`
[INFO] [stderr]     Checking rc-writer v1.1.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "5a74d36b27d2c8b55fa586b8661714327ea66e34f4888a5225e2cb550af50fbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a74d36b27d2c8b55fa586b8661714327ea66e34f4888a5225e2cb550af50fbb", kill_on_drop: false }`
[INFO] [stdout] 5a74d36b27d2c8b55fa586b8661714327ea66e34f4888a5225e2cb550af50fbb