[INFO] fetching crate vrf 0.2.2...
[INFO] checking vrf-0.2.2 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate vrf 0.2.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate vrf 0.2.2 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vrf 0.2.2
[INFO] finished tweaking crates.io crate vrf 0.2.2
[INFO] tweaked toml for crates.io crate vrf 0.2.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate vrf 0.2.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 18d6ba746c275929b3e34484bba54bfb6c3d13f40b5fd1e0258ecab141ebcee4
[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" "18d6ba746c275929b3e34484bba54bfb6c3d13f40b5fd1e0258ecab141ebcee4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "18d6ba746c275929b3e34484bba54bfb6c3d13f40b5fd1e0258ecab141ebcee4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18d6ba746c275929b3e34484bba54bfb6c3d13f40b5fd1e0258ecab141ebcee4", kill_on_drop: false }`
[INFO] [stdout] 18d6ba746c275929b3e34484bba54bfb6c3d13f40b5fd1e0258ecab141ebcee4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9df861d7ca1865a8c19a85d1f319b5a87e27365d643fbdd0fa28b4bbdceef60
[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" "c9df861d7ca1865a8c19a85d1f319b5a87e27365d643fbdd0fa28b4bbdceef60", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling pkg-config v0.3.16
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling openssl v0.10.25
[INFO] [stderr]     Checking hmac-sha256 v0.1.2
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]    Compiling openssl-sys v0.9.52
[INFO] [stderr]    Compiling synstructure v0.12.1
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking vrf v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/openssl/mod.rs:963:9
[INFO] [stdout]     |
[INFO] [stdout] 963 |         expected_c.split_off(16);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/openssl/mod.rs:982:9
[INFO] [stdout]     |
[INFO] [stdout] 982 |         c_hex.split_off(16);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 44.26s
[INFO] running `Command { std: "docker" "inspect" "c9df861d7ca1865a8c19a85d1f319b5a87e27365d643fbdd0fa28b4bbdceef60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9df861d7ca1865a8c19a85d1f319b5a87e27365d643fbdd0fa28b4bbdceef60", kill_on_drop: false }`
[INFO] [stdout] c9df861d7ca1865a8c19a85d1f319b5a87e27365d643fbdd0fa28b4bbdceef60