[INFO] crate hey_listen 0.4.0 is already in cache
[INFO] checking hey_listen-0.4.0 against master#2da942f32802c8233a09744024dfbc34431adf65 for pr-66963
[INFO] extracting crate hey_listen 0.4.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate hey_listen 0.4.0 on toolchain 2da942f32802c8233a09744024dfbc34431adf65
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2da942f32802c8233a09744024dfbc34431adf65" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate hey_listen 0.4.0
[INFO] finished tweaking crates.io crate hey_listen 0.4.0
[INFO] tweaked toml for crates.io crate hey_listen 0.4.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2da942f32802c8233a09744024dfbc34431adf65" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2da942f32802c8233a09744024dfbc34431adf65" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+2da942f32802c8233a09744024dfbc34431adf65" "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] 9cbdb9791f3926d8276f14299a1047f49b6f3433718df6fdece63cbe97f76dec
[INFO] running `"docker" "start" "-a" "9cbdb9791f3926d8276f14299a1047f49b6f3433718df6fdece63cbe97f76dec"`
[INFO] [stderr]    Compiling bytecount v0.4.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]     Checking cargo_metadata v0.6.4
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]     Checking skeptic v0.13.4
[INFO] [stderr]     Checking crossbeam-epoch v0.8.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.2
[INFO] [stderr]     Checking rayon-core v1.6.1
[INFO] [stderr]     Checking rayon v1.2.1
[INFO] [stderr]    Compiling hey_listen v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused boxed `std::ops::Fn` trait object that must be used
[INFO] [stderr]    --> src/sync/parallel_dispatcher.rs:259:17
[INFO] [stderr]     |
[INFO] [stderr] 259 |                 listener_collection.fns.swap_remove(*index);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: closures are lazy and do nothing unless called
[INFO] [stderr] 
[INFO] [stderr] warning: unused boxed `std::ops::Fn` trait object that must be used
[INFO] [stderr]    --> src/sync/parallel_dispatcher.rs:259:17
[INFO] [stderr]     |
[INFO] [stderr] 259 |                 listener_collection.fns.swap_remove(*index);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: closures are lazy and do nothing unless called
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.30s
[INFO] running `"docker" "inspect" "9cbdb9791f3926d8276f14299a1047f49b6f3433718df6fdece63cbe97f76dec"`
[INFO] running `"docker" "rm" "-f" "9cbdb9791f3926d8276f14299a1047f49b6f3433718df6fdece63cbe97f76dec"`
[INFO] [stdout] 9cbdb9791f3926d8276f14299a1047f49b6f3433718df6fdece63cbe97f76dec