[INFO] cloning repository https://github.com/ityy/rust_async_chat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ityy/rust_async_chat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fityy%2Frust_async_chat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fityy%2Frust_async_chat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cf278c79717ed7ba3b8e8a112ab19f8f1d8052a3
[INFO] testing ityy/rust_async_chat against master#caccb4d0368bd918ef6668af8e13834d07040417 for pr-146098-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fityy%2Frust_async_chat" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[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-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ityy/rust_async_chat on toolchain caccb4d0368bd918ef6668af8e13834d07040417
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ityy/rust_async_chat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded async-task v1.0.0
[INFO] [stderr]   Downloaded mio-uds v0.6.7
[INFO] [stderr]   Downloaded async-std v1.2.0
[INFO] [stderr]   Downloaded scopeguard v1.0.0
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[INFO] [stderr]   Downloaded proc-macro2 v1.0.6
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[INFO] [stderr]   Downloaded futures v0.3.1
[INFO] [stderr]   Downloaded futures-timer v2.0.2
[INFO] [stderr]   Downloaded futures-macro v0.3.1
[INFO] [stderr]   Downloaded libc v0.2.65
[INFO] [stderr]   Downloaded syn v1.0.8
[INFO] [stderr]   Downloaded crossbeam-deque v0.7.2
[INFO] [stderr]   Downloaded async-macros v2.0.0
[INFO] [stderr]   Downloaded kv-log-macro v1.0.4
[INFO] [stderr]   Downloaded memoffset v0.5.3
[INFO] [stderr]   Downloaded futures-executor v0.3.1
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[INFO] [stderr]   Downloaded mio v0.6.19
[INFO] [stderr]   Downloaded futures-io v0.3.1
[INFO] [stderr]   Downloaded num_cpus v1.11.1
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[INFO] [stderr]   Downloaded hermit-abi v0.1.3
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[INFO] [stderr]   Downloaded pin-project-lite v0.1.1
[INFO] [stderr]   Downloaded net2 v0.2.33
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9b75b796bbc6e2f38d5e57bb5cc0575a8b638d677c2a420501fb28424085090b
[INFO] running `Command { std: "docker" "start" "-a" "9b75b796bbc6e2f38d5e57bb5cc0575a8b638d677c2a420501fb28424085090b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9b75b796bbc6e2f38d5e57bb5cc0575a8b638d677c2a420501fb28424085090b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b75b796bbc6e2f38d5e57bb5cc0575a8b638d677c2a420501fb28424085090b", kill_on_drop: false }`
[INFO] [stdout] 9b75b796bbc6e2f38d5e57bb5cc0575a8b638d677c2a420501fb28424085090b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4888a4de0ccd15b92c8765389bdeb40e3b8b080bfc1d9c2ee6de4339b8cbdf6
[INFO] running `Command { std: "docker" "start" "-a" "b4888a4de0ccd15b92c8765389bdeb40e3b8b080bfc1d9c2ee6de4339b8cbdf6", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]    Compiling futures-core v0.3.1
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling futures-io v0.3.1
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]    Compiling futures-sink v0.3.1
[INFO] [stderr]    Compiling futures-channel v0.3.1
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling futures-task v0.3.1
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling num_cpus v1.11.1
[INFO] [stderr]    Compiling kv-log-macro v1.0.4
[INFO] [stderr]    Compiling async-macros v2.0.0
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling pin-project-lite v0.1.1
[INFO] [stderr]    Compiling futures-timer v2.0.2
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling async-task v1.0.0
[INFO] [stderr]    Compiling crossbeam-channel v0.4.0
[INFO] [stderr]    Compiling once_cell v1.2.0
[INFO] [stderr]    Compiling crossbeam-deque v0.7.2
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling async-std v1.2.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[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] [stdout] warning: unused import: `task`
[INFO] [stdout]  --> src/t01_accept_loop.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     task, // 2
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Entry` and `HashMap`
[INFO] [stdout]  --> src/t04_connecting_readers_and_writers.rs:9:34
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::collections::hash_map::{Entry, HashMap};
[INFO] [stdout]   |                                  ^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `rust_async_chat`
[INFO] [stdout]   --> src/main.rs:21:40
[INFO] [stdout]    |
[INFO] [stdout] 21 | mod t04_connecting_readers_and_writers;
[INFO] [stdout]    |                                        ^ consider adding a `main` function to `src/main.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dest`
[INFO] [stdout]   --> src/t02_receiving_messages.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let dest: Vec<String> = dest.split(',').map(|name| name.trim().to_string()).collect();
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_dest`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg`
[INFO] [stdout]   --> src/t02_receiving_messages.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let msg: String = msg.trim().to_string();
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_msg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FutureExt`
[INFO] [stdout]   --> src/t02_receiving_messages.rs:10:37
[INFO] [stdout]    |
[INFO] [stdout] 10 | use futures::{AsyncReadExt, Future, FutureExt, StreamExt};
[INFO] [stdout]    |                                     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `AsyncReadExt`
[INFO] [stdout]   --> src/t02_receiving_messages.rs:10:15
[INFO] [stdout]    |
[INFO] [stdout] 10 | use futures::{AsyncReadExt, Future, FutureExt, StreamExt};
[INFO] [stdout]    |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_async_chat` (bin "rust_async_chat") due to 1 previous error; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "b4888a4de0ccd15b92c8765389bdeb40e3b8b080bfc1d9c2ee6de4339b8cbdf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4888a4de0ccd15b92c8765389bdeb40e3b8b080bfc1d9c2ee6de4339b8cbdf6", kill_on_drop: false }`
[INFO] [stdout] b4888a4de0ccd15b92c8765389bdeb40e3b8b080bfc1d9c2ee6de4339b8cbdf6