[INFO] fetching crate prost-build 0.6.1...
[INFO] checking prost-build-0.6.1 against beta for pr-78714
[INFO] extracting crate prost-build 0.6.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate prost-build 0.6.1 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 prost-build 0.6.1
[INFO] finished tweaking crates.io crate prost-build 0.6.1
[INFO] tweaked toml for crates.io crate prost-build 0.6.1 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] 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] 4e7a511bb6eabc5c00e66e8e059824ba350b395bd69f0babcc4927f819efcd87
[INFO] running `Command { std: "docker" "start" "-a" "4e7a511bb6eabc5c00e66e8e059824ba350b395bd69f0babcc4927f819efcd87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e7a511bb6eabc5c00e66e8e059824ba350b395bd69f0babcc4927f819efcd87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e7a511bb6eabc5c00e66e8e059824ba350b395bd69f0babcc4927f819efcd87", kill_on_drop: false }`
[INFO] [stdout] 4e7a511bb6eabc5c00e66e8e059824ba350b395bd69f0babcc4927f819efcd87
[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] 1d60096e890f02be05e1f434ba8cd3a863d0b8a4428c769ecafba86bea4cb4ff
[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" "1d60096e890f02be05e1f434ba8cd3a863d0b8a4428c769ecafba86bea4cb4ff", kill_on_drop: false }`
[INFO] [stderr]     Checking multimap v0.8.2
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]    Compiling prost-build v0.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling prost-derive v0.6.1
[INFO] [stderr]     Checking prost v0.6.1
[INFO] [stderr]     Checking prost-types v0.6.1
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.60s
[INFO] running `Command { std: "docker" "inspect" "1d60096e890f02be05e1f434ba8cd3a863d0b8a4428c769ecafba86bea4cb4ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d60096e890f02be05e1f434ba8cd3a863d0b8a4428c769ecafba86bea4cb4ff", kill_on_drop: false }`
[INFO] [stdout] 1d60096e890f02be05e1f434ba8cd3a863d0b8a4428c769ecafba86bea4cb4ff