[INFO] fetching crate ark-ff 0.3.0...
[INFO] checking ark-ff-0.3.0 against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] extracting crate ark-ff 0.3.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate ark-ff 0.3.0 on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ark-ff 0.3.0
[INFO] finished tweaking crates.io crate ark-ff 0.3.0
[INFO] tweaked toml for crates.io crate ark-ff 0.3.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 63e8bc51c02bf38fccd62273d4b91f344f00172474601063f86ec522916ff9da
[INFO] running `Command { std: "docker" "start" "-a" "63e8bc51c02bf38fccd62273d4b91f344f00172474601063f86ec522916ff9da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63e8bc51c02bf38fccd62273d4b91f344f00172474601063f86ec522916ff9da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63e8bc51c02bf38fccd62273d4b91f344f00172474601063f86ec522916ff9da", kill_on_drop: false }`
[INFO] [stdout] 63e8bc51c02bf38fccd62273d4b91f344f00172474601063f86ec522916ff9da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c31e03711b1784920cdf9ca888d5bc93cbc1ed8913ffc2d984fb5d53f3df195
[INFO] running `Command { std: "docker" "start" "-a" "2c31e03711b1784920cdf9ca888d5bc93cbc1ed8913ffc2d984fb5d53f3df195", kill_on_drop: false }`
[INFO] [stderr]    Compiling ark-ff v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.67s
[INFO] running `Command { std: "docker" "inspect" "2c31e03711b1784920cdf9ca888d5bc93cbc1ed8913ffc2d984fb5d53f3df195", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c31e03711b1784920cdf9ca888d5bc93cbc1ed8913ffc2d984fb5d53f3df195", kill_on_drop: false }`
[INFO] [stdout] 2c31e03711b1784920cdf9ca888d5bc93cbc1ed8913ffc2d984fb5d53f3df195