[INFO] fetching crate vrf 0.2.2...
[INFO] checking vrf-0.2.2 against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] extracting crate vrf 0.2.2 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate vrf 0.2.2 on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", 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-5/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" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7dc5bc29fd73e8c6e1574230583723c9c256492d580f4b4f6573a9031e4497f
[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" "a7dc5bc29fd73e8c6e1574230583723c9c256492d580f4b4f6573a9031e4497f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7dc5bc29fd73e8c6e1574230583723c9c256492d580f4b4f6573a9031e4497f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7dc5bc29fd73e8c6e1574230583723c9c256492d580f4b4f6573a9031e4497f", kill_on_drop: false }`
[INFO] [stdout] a7dc5bc29fd73e8c6e1574230583723c9c256492d580f4b4f6573a9031e4497f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 281a4b449ad55a5bab8d4bf126eadb8ae9c1e89ff8958301f9dbcc5255bf996a
[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" "281a4b449ad55a5bab8d4bf126eadb8ae9c1e89ff8958301f9dbcc5255bf996a", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.46
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling pkg-config v0.3.16
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling openssl v0.10.25
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking hmac-sha256 v0.1.2
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling openssl-sys v0.9.52
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]    Compiling synstructure v0.12.1
[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 `std::vec::Vec::<T>::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 `std::vec::Vec::<T>::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 54.48s
[INFO] running `Command { std: "docker" "inspect" "281a4b449ad55a5bab8d4bf126eadb8ae9c1e89ff8958301f9dbcc5255bf996a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "281a4b449ad55a5bab8d4bf126eadb8ae9c1e89ff8958301f9dbcc5255bf996a", kill_on_drop: false }`
[INFO] [stdout] 281a4b449ad55a5bab8d4bf126eadb8ae9c1e89ff8958301f9dbcc5255bf996a