[INFO] fetching crate ark-groth16 0.2.0...
[INFO] checking ark-groth16-0.2.0 against try#3bb2879ea9e58d65b875f9a98df44f4a43ce2597 for pr-85387
[INFO] extracting crate ark-groth16 0.2.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate ark-groth16 0.2.0 on toolchain 3bb2879ea9e58d65b875f9a98df44f4a43ce2597
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ark-groth16 0.2.0
[INFO] removed 1 missing examples
[INFO] finished tweaking crates.io crate ark-groth16 0.2.0
[INFO] tweaked toml for crates.io crate ark-groth16 0.2.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate ark-groth16 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ark-crypto-primitives v0.2.0
[INFO] [stderr]   Downloaded ark-cp6-782 v0.2.0
[INFO] [stderr]   Downloaded ark-snark v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 13dbb3dd526f469bd337dfa8f86248d0b1adac02649f55b533bce0b8aecbe1fd
[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" "13dbb3dd526f469bd337dfa8f86248d0b1adac02649f55b533bce0b8aecbe1fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "13dbb3dd526f469bd337dfa8f86248d0b1adac02649f55b533bce0b8aecbe1fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13dbb3dd526f469bd337dfa8f86248d0b1adac02649f55b533bce0b8aecbe1fd", kill_on_drop: false }`
[INFO] [stdout] 13dbb3dd526f469bd337dfa8f86248d0b1adac02649f55b533bce0b8aecbe1fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aff1e708bdb391f776201b3f24b95db709a6742280fdd9b0951766c4194bfc13
[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" "aff1e708bdb391f776201b3f24b95db709a6742280fdd9b0951766c4194bfc13", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling const_fn v0.4.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]     Checking pin-project-lite v0.2.0
[INFO] [stderr]     Checking subtle v2.4.0
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling ahash v0.7.2
[INFO] [stderr]    Compiling semver-parser v0.10.1
[INFO] [stderr]     Checking num-traits v0.2.14
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking typenum v1.12.0
[INFO] [stderr]     Checking generic-array v0.14.4
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]     Checking rand_xorshift v0.2.0
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking tracing-subscriber v0.2.15
[INFO] [stderr]     Checking blake2 v0.9.1
[INFO] [stderr]     Checking num-bigint v0.4.0
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling rustc_version v0.3.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling ark-ff v0.2.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking ark-std v0.2.0
[INFO] [stderr]     Checking bstr v0.2.14
[INFO] [stderr]     Checking csv v1.1.5
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling ark-serialize-derive v0.2.0
[INFO] [stderr]    Compiling zeroize_derive v1.0.1
[INFO] [stderr]    Compiling ark-ff-asm v0.2.0
[INFO] [stderr]    Compiling derivative v2.1.1
[INFO] [stderr]    Compiling ark-ff-macros v0.2.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]     Checking zeroize v1.1.1
[INFO] [stderr]     Checking ark-serialize v0.2.0
[INFO] [stderr]     Checking tracing v0.1.22
[INFO] [stderr]     Checking ark-ec v0.2.0
[INFO] [stderr]     Checking ark-relations v0.2.0
[INFO] [stderr]     Checking ark-poly v0.2.0
[INFO] [stderr]     Checking ark-snark v0.2.0
[INFO] [stderr]     Checking ark-r1cs-std v0.2.0
[INFO] [stderr]     Checking ark-bls12-377 v0.2.0
[INFO] [stderr]     Checking ark-crypto-primitives v0.2.0
[INFO] [stderr]     Checking ark-bls12-381 v0.2.0
[INFO] [stderr]     Checking ark-cp6-782 v0.2.0
[INFO] [stderr]     Checking ark-groth16 v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking ark-mnt4-753 v0.2.0
[INFO] [stderr]     Checking ark-mnt4-298 v0.2.0
[INFO] [stderr]     Checking ark-mnt6-298 v0.2.0
[INFO] [stderr]     Checking ark-mnt6-753 v0.2.0
[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-groth16`
[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" "aff1e708bdb391f776201b3f24b95db709a6742280fdd9b0951766c4194bfc13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aff1e708bdb391f776201b3f24b95db709a6742280fdd9b0951766c4194bfc13", kill_on_drop: false }`
[INFO] [stdout] aff1e708bdb391f776201b3f24b95db709a6742280fdd9b0951766c4194bfc13