[INFO] cloning repository https://github.com/johnnyasantoss/chat-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/johnnyasantoss/chat-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnnyasantoss%2Fchat-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnnyasantoss%2Fchat-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c6446fd1dd8e956bb44724d3b794afb670fe192a
[INFO] checking johnnyasantoss/chat-rs against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnnyasantoss%2Fchat-rs" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/johnnyasantoss/chat-rs on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/johnnyasantoss/chat-rs
[INFO] finished tweaking git repo https://github.com/johnnyasantoss/chat-rs
[INFO] tweaked toml for git repo https://github.com/johnnyasantoss/chat-rs written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/johnnyasantoss/chat-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 83ce8dd725803124ef154060781e3825f53ac620f3000a9782d7df7b37aa0d12
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "83ce8dd725803124ef154060781e3825f53ac620f3000a9782d7df7b37aa0d12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83ce8dd725803124ef154060781e3825f53ac620f3000a9782d7df7b37aa0d12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83ce8dd725803124ef154060781e3825f53ac620f3000a9782d7df7b37aa0d12", kill_on_drop: false }`
[INFO] [stdout] 83ce8dd725803124ef154060781e3825f53ac620f3000a9782d7df7b37aa0d12
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 16cf1a41c4c5f4c52d0ea02843b69406b5db36720e1fcb29a7e0ea6997717d1d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "16cf1a41c4c5f4c52d0ea02843b69406b5db36720e1fcb29a7e0ea6997717d1d", kill_on_drop: false }`
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking clap v2.31.2
[INFO] [stderr]     Checking chat-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `username`
[INFO] [stdout]   --> src/server.rs:83:19
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn serve_chat(username: String, stream: TcpStream) {}
[INFO] [stdout]    |                   ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_username`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stream`
[INFO] [stdout]   --> src/server.rs:83:37
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn serve_chat(username: String, stream: TcpStream) {}
[INFO] [stdout]    |                                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `username`
[INFO] [stdout]   --> src/server.rs:83:19
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn serve_chat(username: String, stream: TcpStream) {}
[INFO] [stdout]    |                   ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_username`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stream`
[INFO] [stdout]   --> src/server.rs:83:37
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn serve_chat(username: String, stream: TcpStream) {}
[INFO] [stdout]    |                                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `message`
[INFO] [stdout]  --> src/result.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     message: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `message`
[INFO] [stdout]  --> src/result.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     message: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `handle_msg`
[INFO] [stdout]   --> src/server.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn handle_msg(stream: &mut TcpStream) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `handle_msg`
[INFO] [stdout]   --> src/server.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn handle_msg(stream: &mut TcpStream) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.43s
[INFO] running `Command { std: "docker" "inspect" "16cf1a41c4c5f4c52d0ea02843b69406b5db36720e1fcb29a7e0ea6997717d1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16cf1a41c4c5f4c52d0ea02843b69406b5db36720e1fcb29a7e0ea6997717d1d", kill_on_drop: false }`
[INFO] [stdout] 16cf1a41c4c5f4c52d0ea02843b69406b5db36720e1fcb29a7e0ea6997717d1d