[INFO] fetching crate ark-ed-on-mnt4-753 0.3.0...
[INFO] checking ark-ed-on-mnt4-753-0.3.0 against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] extracting crate ark-ed-on-mnt4-753 0.3.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate ark-ed-on-mnt4-753 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-ed-on-mnt4-753 0.3.0
[INFO] finished tweaking crates.io crate ark-ed-on-mnt4-753 0.3.0
[INFO] tweaked toml for crates.io crate ark-ed-on-mnt4-753 0.3.0 written to /workspace/builds/worker-6/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-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" "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] 5b38c989a652025c8d2d5d1bbfb4f36f6f480f95a35c089c3674b01c16872aa4
[INFO] running `Command { std: "docker" "start" "-a" "5b38c989a652025c8d2d5d1bbfb4f36f6f480f95a35c089c3674b01c16872aa4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b38c989a652025c8d2d5d1bbfb4f36f6f480f95a35c089c3674b01c16872aa4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b38c989a652025c8d2d5d1bbfb4f36f6f480f95a35c089c3674b01c16872aa4", kill_on_drop: false }`
[INFO] [stdout] 5b38c989a652025c8d2d5d1bbfb4f36f6f480f95a35c089c3674b01c16872aa4
[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" "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] 1d1cc148a85c475360bf87164789c2ae4c1bcf66ff8eba1cb71a92316ecd9aec
[INFO] running `Command { std: "docker" "start" "-a" "1d1cc148a85c475360bf87164789c2ae4c1bcf66ff8eba1cb71a92316ecd9aec", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling zeroize_derive v1.1.0
[INFO] [stderr]    Compiling ark-ff-asm v0.3.0
[INFO] [stderr]    Compiling ark-ff-macros v0.3.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]     Checking zeroize v1.3.0
[INFO] [stderr]     Checking ark-ff v0.3.0
[INFO] [stderr]     Checking ark-ec v0.3.0
[INFO] [stderr]     Checking ark-relations v0.3.0
[INFO] [stderr]     Checking ark-mnt4-753 v0.3.0
[INFO] [stderr]     Checking ark-algebra-test-templates v0.3.0
[INFO] [stderr]     Checking ark-ed-on-mnt4-753 v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.78s
[INFO] running `Command { std: "docker" "inspect" "1d1cc148a85c475360bf87164789c2ae4c1bcf66ff8eba1cb71a92316ecd9aec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d1cc148a85c475360bf87164789c2ae4c1bcf66ff8eba1cb71a92316ecd9aec", kill_on_drop: false }`
[INFO] [stdout] 1d1cc148a85c475360bf87164789c2ae4c1bcf66ff8eba1cb71a92316ecd9aec