[INFO] fetching crate systemf 0.1.0...
[INFO] checking systemf-0.1.0 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate systemf 0.1.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate systemf 0.1.0 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate systemf 0.1.0
[INFO] finished tweaking crates.io crate systemf 0.1.0
[INFO] tweaked toml for crates.io crate systemf 0.1.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 59bc3eacc49df8f4135daad9d45a7712faa25632ecd91e61d2b785ae60a7cca1
[INFO] running `Command { std: "docker" "start" "-a" "59bc3eacc49df8f4135daad9d45a7712faa25632ecd91e61d2b785ae60a7cca1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59bc3eacc49df8f4135daad9d45a7712faa25632ecd91e61d2b785ae60a7cca1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59bc3eacc49df8f4135daad9d45a7712faa25632ecd91e61d2b785ae60a7cca1", kill_on_drop: false }`
[INFO] [stdout] 59bc3eacc49df8f4135daad9d45a7712faa25632ecd91e61d2b785ae60a7cca1
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2b311e72f3d6fbfe7371e2b07f685bc3618cd36766d197d85c3978f51ddc047b
[INFO] running `Command { std: "docker" "start" "-a" "2b311e72f3d6fbfe7371e2b07f685bc3618cd36766d197d85c3978f51ddc047b", kill_on_drop: false }`
[INFO] [stderr]     Checking systemf v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/lib.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot test inner items
[INFO] [stdout]   --> src/lib.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         #[test]
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unnameable_test_items)]` on by default
[INFO] [stdout]    = note: this warning originates in the attribute macro `test` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |         __command.status()
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |             systemf!("echo hello, world!");
[INFO] [stdout]    |             ------------------------------ in this macro invocation
[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]    = note: this warning originates in the macro `systemf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "2b311e72f3d6fbfe7371e2b07f685bc3618cd36766d197d85c3978f51ddc047b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b311e72f3d6fbfe7371e2b07f685bc3618cd36766d197d85c3978f51ddc047b", kill_on_drop: false }`
[INFO] [stdout] 2b311e72f3d6fbfe7371e2b07f685bc3618cd36766d197d85c3978f51ddc047b