[INFO] fetching crate ark-nonnative-field 0.2.0...
[INFO] checking ark-nonnative-field-0.2.0 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate ark-nonnative-field 0.2.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ark-nonnative-field 0.2.0 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ark-nonnative-field 0.2.0
[INFO] finished tweaking crates.io crate ark-nonnative-field 0.2.0
[INFO] tweaked toml for crates.io crate ark-nonnative-field 0.2.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f5214d936032bcf7235b6118278a9edcd2f03cc36bf1d5a107b2b27f124411ff
[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" "f5214d936032bcf7235b6118278a9edcd2f03cc36bf1d5a107b2b27f124411ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5214d936032bcf7235b6118278a9edcd2f03cc36bf1d5a107b2b27f124411ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5214d936032bcf7235b6118278a9edcd2f03cc36bf1d5a107b2b27f124411ff", kill_on_drop: false }`
[INFO] [stdout] f5214d936032bcf7235b6118278a9edcd2f03cc36bf1d5a107b2b27f124411ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 13b65c095e7a342a5c18993fe2c4bbd5fb3f6e219c2a0e4a9de2135935ea8496
[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" "13b65c095e7a342a5c18993fe2c4bbd5fb3f6e219c2a0e4a9de2135935ea8496", kill_on_drop: false }`
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]    Compiling ark-ff-macros v0.2.0
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking num-bigint v0.4.0
[INFO] [stderr]     Checking ark-ff v0.2.0
[INFO] [stderr]     Checking ark-ec v0.2.0
[INFO] [stderr]     Checking ark-relations v0.2.0
[INFO] [stderr]     Checking ark-mnt4-298 v0.2.0
[INFO] [stderr]     Checking ark-mnt4-753 v0.2.0
[INFO] [stderr]     Checking ark-r1cs-std v0.2.0
[INFO] [stderr]     Checking ark-bls12-381 v0.2.0
[INFO] [stderr]     Checking ark-bls12-377 v0.2.0
[INFO] [stderr]     Checking ark-pallas v0.2.0
[INFO] [stderr]     Checking ark-mnt6-298 v0.2.0
[INFO] [stderr]     Checking ark-mnt6-753 v0.2.0
[INFO] [stderr]     Checking ark-nonnative-field v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: couldn't read benches/bench.rs: No such file or directory (os error 2)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ark-nonnative-field`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "13b65c095e7a342a5c18993fe2c4bbd5fb3f6e219c2a0e4a9de2135935ea8496", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13b65c095e7a342a5c18993fe2c4bbd5fb3f6e219c2a0e4a9de2135935ea8496", kill_on_drop: false }`
[INFO] [stdout] 13b65c095e7a342a5c18993fe2c4bbd5fb3f6e219c2a0e4a9de2135935ea8496