[INFO] fetching crate docked 0.0.24...
[INFO] checking docked-0.0.24 against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] extracting crate docked 0.0.24 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate docked 0.0.24 on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate docked 0.0.24
[INFO] finished tweaking crates.io crate docked 0.0.24
[INFO] tweaked toml for crates.io crate docked 0.0.24 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate docked 0.0.24 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "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" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "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] fbb8797012c019e7ee8b8272d6a0e26e47e3ea1c58992b5b666af3c541a7f439
[INFO] running `Command { std: "docker" "start" "-a" "fbb8797012c019e7ee8b8272d6a0e26e47e3ea1c58992b5b666af3c541a7f439", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fbb8797012c019e7ee8b8272d6a0e26e47e3ea1c58992b5b666af3c541a7f439", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbb8797012c019e7ee8b8272d6a0e26e47e3ea1c58992b5b666af3c541a7f439", kill_on_drop: false }`
[INFO] [stdout] fbb8797012c019e7ee8b8272d6a0e26e47e3ea1c58992b5b666af3c541a7f439
[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" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] b2de6cf7fbfa088fd4c908d7495bf655e428258ccd3a681c09579f37233398f9
[INFO] running `Command { std: "docker" "start" "-a" "b2de6cf7fbfa088fd4c908d7495bf655e428258ccd3a681c09579f37233398f9", kill_on_drop: false }`
[INFO] [stderr]     Checking docked v0.0.24 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "b2de6cf7fbfa088fd4c908d7495bf655e428258ccd3a681c09579f37233398f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2de6cf7fbfa088fd4c908d7495bf655e428258ccd3a681c09579f37233398f9", kill_on_drop: false }`
[INFO] [stdout] b2de6cf7fbfa088fd4c908d7495bf655e428258ccd3a681c09579f37233398f9