[INFO] updating cached repository https://github.com/cesare/rust_slack_client
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6cc3488df262e171bb813216403502d05f109a54
[INFO] checking cesare/rust_slack_client against try#e689e5eaefe96e6dc3ed5bb629c521b7d207aff7 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcesare%2Frust_slack_client" "work/builds/worker-5/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cesare/rust_slack_client on toolchain e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/cesare/rust_slack_client
[INFO] finished tweaking git repo https://github.com/cesare/rust_slack_client
[INFO] tweaked toml for git repo https://github.com/cesare/rust_slack_client written to work/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/cesare/rust_slack_client already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6185538fa68828e4cb16a718ce4768ab259134a2ea8f6938a1f9dfd91748e456
[INFO] running `"docker" "start" "-a" "6185538fa68828e4cb16a718ce4768ab259134a2ea8f6938a1f9dfd91748e456"`
[INFO] [stderr]     Checking mio v0.6.15
[INFO] [stderr]     Checking want v0.0.6
[INFO] [stderr]     Checking tokio-timer v0.2.6
[INFO] [stderr]     Checking tokio-io v0.1.8
[INFO] [stderr]     Checking http v0.1.10
[INFO] [stderr]    Compiling openssl v0.10.11
[INFO] [stderr]    Compiling native-tls v0.2.1
[INFO] [stderr]     Checking tokio-threadpool v0.1.6
[INFO] [stderr]     Checking tokio-codec v0.1.0
[INFO] [stderr]     Checking mio-uds v0.6.6
[INFO] [stderr]     Checking tokio-reactor v0.1.5
[INFO] [stderr]     Checking tokio-fs v0.1.3
[INFO] [stderr]     Checking h2 v0.1.12
[INFO] [stderr]     Checking tokio-uds v0.2.1
[INFO] [stderr]     Checking tokio-tcp v0.1.1
[INFO] [stderr]     Checking tokio-udp v0.1.2
[INFO] [stderr]     Checking tokio v0.1.8
[INFO] [stderr]     Checking hyper v0.12.9
[INFO] [stderr]     Checking hyper-tls v0.3.0
[INFO] [stderr]     Checking slack_client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: field is never used: `client`
[INFO] [stderr]   --> src/conversation.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     client: HttpClient,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `client`
[INFO] [stderr]   --> src/conversation.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     client: HttpClient,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 35s
[INFO] running `"docker" "inspect" "6185538fa68828e4cb16a718ce4768ab259134a2ea8f6938a1f9dfd91748e456"`
[INFO] running `"docker" "rm" "-f" "6185538fa68828e4cb16a718ce4768ab259134a2ea8f6938a1f9dfd91748e456"`
[INFO] [stdout] 6185538fa68828e4cb16a718ce4768ab259134a2ea8f6938a1f9dfd91748e456