[INFO] cloning repository https://github.com/a459787545/rust-learn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/a459787545/rust-learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fa459787545%2Frust-learn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fa459787545%2Frust-learn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8ac3bedb7982590cac25772d616f3680a8fcefc4
[INFO] checking a459787545/rust-learn against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fa459787545%2Frust-learn" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/a459787545/rust-learn on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/a459787545/rust-learn
[INFO] finished tweaking git repo https://github.com/a459787545/rust-learn
[INFO] tweaked toml for git repo https://github.com/a459787545/rust-learn written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/a459787545/rust-learn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b3e0998b5c28a2e57bee142b5dd083c4762f28ba26d5be5654b4b32ba8347ec7
[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" "b3e0998b5c28a2e57bee142b5dd083c4762f28ba26d5be5654b4b32ba8347ec7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3e0998b5c28a2e57bee142b5dd083c4762f28ba26d5be5654b4b32ba8347ec7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3e0998b5c28a2e57bee142b5dd083c4762f28ba26d5be5654b4b32ba8347ec7", kill_on_drop: false }`
[INFO] [stdout] b3e0998b5c28a2e57bee142b5dd083c4762f28ba26d5be5654b4b32ba8347ec7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e183b85561262483f7e182f41f1d9c5d1419d76f92eeef715a472be43de68111
[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" "e183b85561262483f7e182f41f1d9c5d1419d76f92eeef715a472be43de68111", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-learn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::panic`
[INFO] [stdout]  --> src/lesson04/course04.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::panic;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::lesson04::course04::Time`
[INFO] [stdout]  --> src/lesson03/simple_tcp_server.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::lesson04::course04::Time;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `handle_client`
[INFO] [stdout]  --> src/lesson03/simple_tcp_server.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn handle_client(mut stream: TcpStream) -> Result<(), Error> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `start_server`
[INFO] [stdout]   --> src/lesson03/simple_tcp_server.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn start_server(){
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]   --> src/lesson03/simple_tcp_server.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn run() -> std::io::Result<()> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `start_tcp_server`
[INFO] [stdout]   --> src/main.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn start_tcp_server() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::panic`
[INFO] [stdout]  --> src/lesson04/course04.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::panic;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::lesson04::course04::Time`
[INFO] [stdout]  --> src/lesson03/simple_tcp_server.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::lesson04::course04::Time;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lesson04/course04.rs:94:36
[INFO] [stdout]    |
[INFO] [stdout] 94 |         assert_eq!(12.0, calc_area(rec));
[INFO] [stdout]    |                                    ^^^
[INFO] [stdout]    |                                    |
[INFO] [stdout]    |                                    expected reference, found struct `Rectangle`
[INFO] [stdout]    |                                    help: consider borrowing here: `&rec`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected reference `&_`
[INFO] [stdout]                  found struct `Rectangle`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-learn` due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "e183b85561262483f7e182f41f1d9c5d1419d76f92eeef715a472be43de68111", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e183b85561262483f7e182f41f1d9c5d1419d76f92eeef715a472be43de68111", kill_on_drop: false }`
[INFO] [stdout] e183b85561262483f7e182f41f1d9c5d1419d76f92eeef715a472be43de68111