[INFO] updating cached repository https://github.com/ityy/rust_async_chat
[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] cf278c79717ed7ba3b8e8a112ab19f8f1d8052a3
[INFO] testing ityy/rust_async_chat against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fityy%2Frust_async_chat" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ityy/rust_async_chat on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ityy/rust_async_chat
[INFO] finished tweaking git repo https://github.com/ityy/rust_async_chat
[INFO] tweaked toml for git repo https://github.com/ityy/rust_async_chat written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/ityy/rust_async_chat already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a6c8bbb1094fe5133c6ea40282e78a0620ea338c8427cedcfedc90216c501762
[INFO] running `"docker" "start" "-a" "a6c8bbb1094fe5133c6ea40282e78a0620ea338c8427cedcfedc90216c501762"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling kv-log-macro v1.0.4
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling async-std v1.2.0
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]    Compiling futures-util v0.3.1
[INFO] [stderr]    Compiling futures-executor v0.3.1
[INFO] [stderr]    Compiling futures v0.3.1
[INFO] [stderr]    Compiling rust_async_chat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `task`
[INFO] [stderr]  --> src/t01_accept_loop.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     task, // 2
[INFO] [stderr]   |     ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Entry`, `HashMap`
[INFO] [stderr]  --> src/t04_connecting_readers_and_writers.rs:9:34
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::collections::hash_map::{Entry, HashMap};
[INFO] [stderr]   |                                  ^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0601]: `main` function not found in crate `rust_async_chat`
[INFO] [stderr]   --> src/main.rs:1:1
[INFO] [stderr]    |
[INFO] [stderr] 1  | / //! 规格与说明
[INFO] [stderr] 2  | | //! 聊天使用基于TCP的简单文本协议。该协议包含utf-8消息，以\n分隔。
[INFO] [stderr] 3  | | //! 客户端连接到服务器，并作为第一行发送登录信息。之后，客户端可以使用以下语法将消息发送给其他客户端：
[INFO] [stderr] 4  | | //! login1, login2, ... loginN: message
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | | //mod t03_sending_messages;
[INFO] [stderr] 21 | | mod t04_connecting_readers_and_writers;
[INFO] [stderr]    | |_______________________________________^ consider adding a `main` function to `src/main.rs`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `AsyncReadExt`
[INFO] [stderr]   --> src/t02_receiving_messages.rs:10:15
[INFO] [stderr]    |
[INFO] [stderr] 10 | use futures::{AsyncReadExt, Future, FutureExt, StreamExt};
[INFO] [stderr]    |               ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `FutureExt`
[INFO] [stderr]   --> src/t02_receiving_messages.rs:10:37
[INFO] [stderr]    |
[INFO] [stderr] 10 | use futures::{AsyncReadExt, Future, FutureExt, StreamExt};
[INFO] [stderr]    |                                     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error: could not compile `rust_async_chat`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a6c8bbb1094fe5133c6ea40282e78a0620ea338c8427cedcfedc90216c501762"`
[INFO] running `"docker" "rm" "-f" "a6c8bbb1094fe5133c6ea40282e78a0620ea338c8427cedcfedc90216c501762"`
[INFO] [stdout] a6c8bbb1094fe5133c6ea40282e78a0620ea338c8427cedcfedc90216c501762