[INFO] fetching crate twang 0.4.0...
[INFO] checking twang-0.4.0 against master#c919f490bbcd2b29b74016101f7ec71aaa24bdbb for pr-79073
[INFO] extracting crate twang 0.4.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate twang 0.4.0 on toolchain c919f490bbcd2b29b74016101f7ec71aaa24bdbb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate twang 0.4.0
[INFO] finished tweaking crates.io crate twang 0.4.0
[INFO] tweaked toml for crates.io crate twang 0.4.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate twang 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8b4fcf83a4ef528918414fc45429699297474610e8fb78eaa72b5b0b5c8b25ff
[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" "8b4fcf83a4ef528918414fc45429699297474610e8fb78eaa72b5b0b5c8b25ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b4fcf83a4ef528918414fc45429699297474610e8fb78eaa72b5b0b5c8b25ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b4fcf83a4ef528918414fc45429699297474610e8fb78eaa72b5b0b5c8b25ff", kill_on_drop: false }`
[INFO] [stdout] 8b4fcf83a4ef528918414fc45429699297474610e8fb78eaa72b5b0b5c8b25ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3002640ef182d5801a2baf99a58fc44c9e0b8bdef5c49b195e9d7f282b2a3a6e
[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" "3002640ef182d5801a2baf99a58fc44c9e0b8bdef5c49b195e9d7f282b2a3a6e", kill_on_drop: false }`
[INFO] [stderr]     Checking fon v0.2.0
[INFO] [stderr]     Checking twang v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.06s
[INFO] running `Command { std: "docker" "inspect" "3002640ef182d5801a2baf99a58fc44c9e0b8bdef5c49b195e9d7f282b2a3a6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3002640ef182d5801a2baf99a58fc44c9e0b8bdef5c49b195e9d7f282b2a3a6e", kill_on_drop: false }`
[INFO] [stdout] 3002640ef182d5801a2baf99a58fc44c9e0b8bdef5c49b195e9d7f282b2a3a6e