[INFO] updating cached repository https://github.com/fzzzy/chat-rust-websocket
[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] d157f8c6f9bc632e8e0e926717015188512132b1
[INFO] checking fzzzy/chat-rust-websocket against try#ba14a92a10441c4b839ce71e6ef5f7a48bbff18f for prs-64470-and-65389
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffzzzy%2Fchat-rust-websocket" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fzzzy/chat-rust-websocket on toolchain ba14a92a10441c4b839ce71e6ef5f7a48bbff18f
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba14a92a10441c4b839ce71e6ef5f7a48bbff18f" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/fzzzy/chat-rust-websocket
[INFO] finished tweaking git repo https://github.com/fzzzy/chat-rust-websocket
[INFO] tweaked toml for git repo https://github.com/fzzzy/chat-rust-websocket written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/fzzzy/chat-rust-websocket already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba14a92a10441c4b839ce71e6ef5f7a48bbff18f" "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" "+ba14a92a10441c4b839ce71e6ef5f7a48bbff18f" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1d8cf5ea351d76f1ea903bca78ec899a2290cf6fc236127a18ce5b37e0ce2b3e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "1d8cf5ea351d76f1ea903bca78ec899a2290cf6fc236127a18ce5b37e0ce2b3e"`
[INFO] [stderr]     Checking tokio-timer v0.2.8
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking crossbeam-epoch v0.7.0
[INFO] [stderr]     Checking openssl v0.10.16
[INFO] [stderr]     Checking tokio-io v0.1.10
[INFO] [stderr]     Checking hyper v0.10.15
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]     Checking tokio-threadpool v0.1.9
[INFO] [stderr]     Checking tokio-reactor v0.1.7
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking tokio-fs v0.1.4
[INFO] [stderr]     Checking native-tls v0.2.2
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking tokio-tcp v0.1.2
[INFO] [stderr]     Checking tokio-uds v0.2.4
[INFO] [stderr]     Checking tokio-tls v0.2.0
[INFO] [stderr]     Checking tokio v0.1.13
[INFO] [stderr]     Checking websocket v0.22.0
[INFO] [stderr]     Checking chat-rust-websocket v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.81s
[INFO] running `"docker" "inspect" "1d8cf5ea351d76f1ea903bca78ec899a2290cf6fc236127a18ce5b37e0ce2b3e"`
[INFO] running `"docker" "rm" "-f" "1d8cf5ea351d76f1ea903bca78ec899a2290cf6fc236127a18ce5b37e0ce2b3e"`
[INFO] [stdout] 1d8cf5ea351d76f1ea903bca78ec899a2290cf6fc236127a18ce5b37e0ce2b3e