[INFO] crate sonos_discovery 0.0.2 is already in cache
[INFO] checking sonos_discovery-0.0.2 against master#3dbade652ed8ebac70f903e01f51cd92c4e4302c for pr-69880
[INFO] extracting crate sonos_discovery 0.0.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate sonos_discovery 0.0.2 on toolchain 3dbade652ed8ebac70f903e01f51cd92c4e4302c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate sonos_discovery 0.0.2
[INFO] finished tweaking crates.io crate sonos_discovery 0.0.2
[INFO] tweaked toml for crates.io crate sonos_discovery 0.0.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate sonos_discovery 0.0.2 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "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" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7f2c43dc7714a1aa17e4ff2975bbac3e9e1b16b23d289637fceb35634e617d79
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "7f2c43dc7714a1aa17e4ff2975bbac3e9e1b16b23d289637fceb35634e617d79"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling num-traits v0.2.9
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-bigint v0.2.3
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking socket v0.0.7
[INFO] [stderr]     Checking sonos_discovery v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/lib.rs:122:25
[INFO] [stderr]     |
[INFO] [stderr] 122 |                         sender.send((_addr, _data)).is_ok();
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/lib.rs:122:25
[INFO] [stderr]     |
[INFO] [stderr] 122 |                         sender.send((_addr, _data)).is_ok();
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.14s
[INFO] running `"docker" "inspect" "7f2c43dc7714a1aa17e4ff2975bbac3e9e1b16b23d289637fceb35634e617d79"`
[INFO] running `"docker" "rm" "-f" "7f2c43dc7714a1aa17e4ff2975bbac3e9e1b16b23d289637fceb35634e617d79"`
[INFO] [stdout] 7f2c43dc7714a1aa17e4ff2975bbac3e9e1b16b23d289637fceb35634e617d79