[INFO] fetching crate netns 0.1.0...
[INFO] checking netns-0.1.0 against try#894d32a5432c6a6461bb2aac7c3d5f2e87dce83f for pr-77015
[INFO] extracting crate netns 0.1.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate netns 0.1.0 on toolchain 894d32a5432c6a6461bb2aac7c3d5f2e87dce83f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate netns 0.1.0
[INFO] finished tweaking crates.io crate netns 0.1.0
[INFO] tweaked toml for crates.io crate netns 0.1.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3f4acb8280933963fb26062b635a6a29cbb98b6a731477e3b59b5b78a4f359dd
[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" "3f4acb8280933963fb26062b635a6a29cbb98b6a731477e3b59b5b78a4f359dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f4acb8280933963fb26062b635a6a29cbb98b6a731477e3b59b5b78a4f359dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f4acb8280933963fb26062b635a6a29cbb98b6a731477e3b59b5b78a4f359dd", kill_on_drop: false }`
[INFO] [stdout] 3f4acb8280933963fb26062b635a6a29cbb98b6a731477e3b59b5b78a4f359dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7adfbf6f57a41255e98856cdb8b804e8ff3f214daa6893ff1bd655e37dccb9ab
[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" "7adfbf6f57a41255e98856cdb8b804e8ff3f214daa6893ff1bd655e37dccb9ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.78
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking nix v0.8.1
[INFO] [stderr]     Checking netns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> examples/basic.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout] 11 |         NetNS::set(temp);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.46s
[INFO] running `Command { std: "docker" "inspect" "7adfbf6f57a41255e98856cdb8b804e8ff3f214daa6893ff1bd655e37dccb9ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7adfbf6f57a41255e98856cdb8b804e8ff3f214daa6893ff1bd655e37dccb9ab", kill_on_drop: false }`
[INFO] [stdout] 7adfbf6f57a41255e98856cdb8b804e8ff3f214daa6893ff1bd655e37dccb9ab