[INFO] crate serenity 0.7.3 is already in cache
[INFO] checking serenity-0.7.3 against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] extracting crate serenity 0.7.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate serenity 0.7.3 on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate serenity 0.7.3
[INFO] finished tweaking crates.io crate serenity 0.7.3
[INFO] tweaked toml for crates.io crate serenity 0.7.3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "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-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" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "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] 2120c53d14669ef2b4db021c992974d46fb1dc552aa4f9396c6f1ef3a84fc456
[INFO] running `"docker" "start" "-a" "2120c53d14669ef2b4db021c992974d46fb1dc552aa4f9396c6f1ef3a84fc456"`
[INFO] [stderr]    Compiling serenity v0.7.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking uwl v0.4.2
[INFO] [stderr]    Compiling serde_derive v1.0.103
[INFO] [stderr]     Checking rustls v0.16.0
[INFO] [stderr]     Checking ct-logs v0.6.0
[INFO] [stderr]     Checking webpki-roots v0.17.0
[INFO] [stderr]    Compiling command_attr v0.1.5
[INFO] [stderr]     Checking sha-1 v0.8.1
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking tungstenite v0.9.2
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking tokio-rustls v0.10.2
[INFO] [stderr]     Checking hyper-rustls v0.17.1
[INFO] [stderr]     Checking serde v1.0.103
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking reqwest v0.9.24
[INFO] [stderr] warning: unused import: `error::Error`
[INFO] [stderr]   --> src/model/guild/audit_log.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     error::Error,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `error::Error`
[INFO] [stderr]   --> src/model/guild/audit_log.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     error::Error,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 11s
[INFO] running `"docker" "inspect" "2120c53d14669ef2b4db021c992974d46fb1dc552aa4f9396c6f1ef3a84fc456"`
[INFO] running `"docker" "rm" "-f" "2120c53d14669ef2b4db021c992974d46fb1dc552aa4f9396c6f1ef3a84fc456"`
[INFO] [stdout] 2120c53d14669ef2b4db021c992974d46fb1dc552aa4f9396c6f1ef3a84fc456