[INFO] fetching crate utuntap 0.2.2...
[INFO] checking utuntap-0.2.2 against master#d939f708d960161d23b964309ba68ff207fc0ead for pr-70087
[INFO] extracting crate utuntap 0.2.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate utuntap 0.2.2 on toolchain d939f708d960161d23b964309ba68ff207fc0ead
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d939f708d960161d23b964309ba68ff207fc0ead" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate utuntap 0.2.2
[INFO] finished tweaking crates.io crate utuntap 0.2.2
[INFO] tweaked toml for crates.io crate utuntap 0.2.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d939f708d960161d23b964309ba68ff207fc0ead" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d939f708d960161d23b964309ba68ff207fc0ead" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+d939f708d960161d23b964309ba68ff207fc0ead" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 757e036830b0879073ff8b2c3ab4ac405c49c664f4eb285ad2a041f7bd9a5f1c
[INFO] running `"docker" "start" "-a" "757e036830b0879073ff8b2c3ab4ac405c49c664f4eb285ad2a041f7bd9a5f1c"`
[INFO] [stderr]     Checking nix v0.17.0
[INFO] [stderr]     Checking etherparse v0.9.0
[INFO] [stderr]    Compiling serial_test_derive v0.4.0
[INFO] [stderr]     Checking serial_test v0.4.0
[INFO] [stderr]     Checking utuntap v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: field is never read: `flags`
[INFO] [stderr]  --> src/interface/linux.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     flags: Flags,
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `flags`
[INFO] [stderr]  --> src/interface/linux.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     flags: Flags,
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.65s
[INFO] running `"docker" "inspect" "757e036830b0879073ff8b2c3ab4ac405c49c664f4eb285ad2a041f7bd9a5f1c"`
[INFO] running `"docker" "rm" "-f" "757e036830b0879073ff8b2c3ab4ac405c49c664f4eb285ad2a041f7bd9a5f1c"`
[INFO] [stdout] 757e036830b0879073ff8b2c3ab4ac405c49c664f4eb285ad2a041f7bd9a5f1c