[INFO] cloning repository https://github.com/Chabare/Sonos
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Chabare/Sonos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChabare%2FSonos"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChabare%2FSonos'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5839e7f4300d6db6d0dc8c74578c5d7d83752334
[INFO] checking Chabare/Sonos against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChabare%2FSonos" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Chabare/Sonos on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Chabare/Sonos
[INFO] finished tweaking git repo https://github.com/Chabare/Sonos
[INFO] tweaked toml for git repo https://github.com/Chabare/Sonos written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Chabare/Sonos already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sonos_discovery v0.0.1
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "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] 9694caf3c80304addd816a74d65f299b872c5a05737c2fdac8764dfc00fadd5c
[INFO] running `"docker" "start" "-a" "9694caf3c80304addd816a74d65f299b872c5a05737c2fdac8764dfc00fadd5c"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking futures v0.1.15
[INFO] [stderr]     Checking num-complex v0.1.40
[INFO] [stderr]     Checking fern v0.4.2
[INFO] [stderr]     Checking num-bigint v0.1.40
[INFO] [stderr]     Checking num-rational v0.1.39
[INFO] [stderr]     Checking num v0.1.40
[INFO] [stderr]     Checking socket v0.0.7
[INFO] [stderr]     Checking sonos_discovery v0.0.1
[INFO] [stderr]     Checking sonos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: method is never used: `empty`
[INFO] [stderr]  --> src/zone/info.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn empty() -> Self {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty`
[INFO] [stderr]  --> src/zone/info.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn empty() -> Self {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.02s
[INFO] running `"docker" "inspect" "9694caf3c80304addd816a74d65f299b872c5a05737c2fdac8764dfc00fadd5c"`
[INFO] running `"docker" "rm" "-f" "9694caf3c80304addd816a74d65f299b872c5a05737c2fdac8764dfc00fadd5c"`
[INFO] [stdout] 9694caf3c80304addd816a74d65f299b872c5a05737c2fdac8764dfc00fadd5c