[INFO] crate broker-tokio 0.2.16 is already in cache
[INFO] checking broker-tokio-0.2.16 against master#ba72b15666b2491415aec703a02c2364fe5e2790 for pr-71140
[INFO] extracting crate broker-tokio 0.2.16 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate broker-tokio 0.2.16 on toolchain ba72b15666b2491415aec703a02c2364fe5e2790
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate broker-tokio 0.2.16
[INFO] finished tweaking crates.io crate broker-tokio 0.2.16
[INFO] tweaked toml for crates.io crate broker-tokio 0.2.16 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "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" "+ba72b15666b2491415aec703a02c2364fe5e2790" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+ba72b15666b2491415aec703a02c2364fe5e2790" "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] 8a4a540765242f833ec9983a42e4f4942c5cfa55c27dbd7f457e1d9f6caabb88
[INFO] running `"docker" "start" "-a" "8a4a540765242f833ec9983a42e4f4942c5cfa55c27dbd7f457e1d9f6caabb88"`
[INFO] [stderr]     Checking tokio v0.2.18
[INFO] [stderr]     Checking broker-tokio v0.2.16 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling generator v0.6.20
[INFO] [stderr]     Checking serde v1.0.106
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking tokio-test v0.2.0
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]     Checking loom v0.2.15
[INFO] [stderr] warning: function is never used: `backoff`
[INFO] [stderr]  --> src/tests/backoff.rs:7:15
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub(crate) fn backoff(n: usize) -> impl Future<Output = ()> {
[INFO] [stderr]   |               ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `backoff_clone`
[INFO] [stderr]   --> src/tests/backoff.rs:12:15
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub(crate) fn backoff_clone(n: usize) -> impl Future<Output = ()> {
[INFO] [stderr]    |               ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `track_drop`
[INFO] [stderr]   --> src/tests/track_drop.rs:14:15
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub(crate) fn track_drop<T: Future>(
[INFO] [stderr]    |               ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_ref`
[INFO] [stderr]   --> src/tests/track_drop.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub(crate) fn get_ref(&self) -> &T {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `did_drop_future`
[INFO] [stderr]   --> src/tests/track_drop.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     pub(crate) fn did_drop_future(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `did_drop_output`
[INFO] [stderr]   --> src/tests/track_drop.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub(crate) fn did_drop_output(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.91s
[INFO] running `"docker" "inspect" "8a4a540765242f833ec9983a42e4f4942c5cfa55c27dbd7f457e1d9f6caabb88"`
[INFO] running `"docker" "rm" "-f" "8a4a540765242f833ec9983a42e4f4942c5cfa55c27dbd7f457e1d9f6caabb88"`
[INFO] [stdout] 8a4a540765242f833ec9983a42e4f4942c5cfa55c27dbd7f457e1d9f6caabb88