[INFO] updating cached repository https://github.com/Technius/tokio-chatserver-example
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] 3af98e84698fe09821b421e898b89180dc60b608
[INFO] checking Technius/tokio-chatserver-example against master#446e5e57b667c841ba3ebb4b41b44fb98bd3af4b for pr-65294
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTechnius%2Ftokio-chatserver-example" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Technius/tokio-chatserver-example on toolchain 446e5e57b667c841ba3ebb4b41b44fb98bd3af4b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+446e5e57b667c841ba3ebb4b41b44fb98bd3af4b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Technius/tokio-chatserver-example
[INFO] finished tweaking git repo https://github.com/Technius/tokio-chatserver-example
[INFO] tweaked toml for git repo https://github.com/Technius/tokio-chatserver-example written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Technius/tokio-chatserver-example already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+446e5e57b667c841ba3ebb4b41b44fb98bd3af4b" "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" "+446e5e57b667c841ba3ebb4b41b44fb98bd3af4b" "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] 3db56c287d9f3f970b2575b7cff6f077f02213f59546e5839c7b9f3b30d1d28d
[INFO] running `"docker" "start" "-a" "3db56c287d9f3f970b2575b7cff6f077f02213f59546e5839c7b9f3b30d1d28d"`
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr]     Checking tokio-threadpool v0.1.14
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking tokio v0.1.19
[INFO] [stderr]     Checking tokio-chatserver-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `recipient`
[INFO] [stderr]   --> src/main.rs:98:38
[INFO] [stderr]    |
[INFO] [stderr] 98 |                         if let Some((recipient, recip_sender)) = sender_opt {
[INFO] [stderr]    |                                      ^^^^^^^^^ help: consider prefixing with an underscore: `_recipient`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `recipient`
[INFO] [stderr]   --> src/main.rs:98:38
[INFO] [stderr]    |
[INFO] [stderr] 98 |                         if let Some((recipient, recip_sender)) = sender_opt {
[INFO] [stderr]    |                                      ^^^^^^^^^ help: consider prefixing with an underscore: `_recipient`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.50s
[INFO] running `"docker" "inspect" "3db56c287d9f3f970b2575b7cff6f077f02213f59546e5839c7b9f3b30d1d28d"`
[INFO] running `"docker" "rm" "-f" "3db56c287d9f3f970b2575b7cff6f077f02213f59546e5839c7b9f3b30d1d28d"`
[INFO] [stdout] 3db56c287d9f3f970b2575b7cff6f077f02213f59546e5839c7b9f3b30d1d28d