[INFO] fetching crate keygen 2.1.0...
[INFO] checking keygen-2.1.0 against beta for pr-78714
[INFO] extracting crate keygen 2.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate keygen 2.1.0 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 keygen 2.1.0
[INFO] finished tweaking crates.io crate keygen 2.1.0
[INFO] tweaked toml for crates.io crate keygen 2.1.0 written to /workspace/builds/worker-7/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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 8e0875fa3034f5a1d672ff4044fb825d5f6cabf273850510de4ead5c2d5b3686
[INFO] running `Command { std: "docker" "start" "-a" "8e0875fa3034f5a1d672ff4044fb825d5f6cabf273850510de4ead5c2d5b3686", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e0875fa3034f5a1d672ff4044fb825d5f6cabf273850510de4ead5c2d5b3686", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e0875fa3034f5a1d672ff4044fb825d5f6cabf273850510de4ead5c2d5b3686", kill_on_drop: false }`
[INFO] [stdout] 8e0875fa3034f5a1d672ff4044fb825d5f6cabf273850510de4ead5c2d5b3686
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] ba9991505be8b1d92e4314d3bcfd7be5b17857b7ba9e33c6cf6d5a4e09b772c6
[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" "ba9991505be8b1d92e4314d3bcfd7be5b17857b7ba9e33c6cf6d5a4e09b772c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling build_const v0.2.1
[INFO] [stderr]     Checking serial-key v2.0.0
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]     Checking keygen v2.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.42s
[INFO] running `Command { std: "docker" "inspect" "ba9991505be8b1d92e4314d3bcfd7be5b17857b7ba9e33c6cf6d5a4e09b772c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba9991505be8b1d92e4314d3bcfd7be5b17857b7ba9e33c6cf6d5a4e09b772c6", kill_on_drop: false }`
[INFO] [stdout] ba9991505be8b1d92e4314d3bcfd7be5b17857b7ba9e33c6cf6d5a4e09b772c6