[INFO] cloning repository https://github.com/preboy/rworld
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/preboy/rworld" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpreboy%2Frworld", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpreboy%2Frworld'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7d9576b2837d4c64f75198d2264d531b2eebceca
[INFO] testing preboy/rworld against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpreboy%2Frworld" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/preboy/rworld on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/preboy/rworld
[INFO] finished tweaking git repo https://github.com/preboy/rworld
[INFO] tweaked toml for git repo https://github.com/preboy/rworld written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/preboy/rworld already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9212b7fb71096873f39e6d8bb43297d8f9436d67e036f65ca5f7358ab962c574
[INFO] running `Command { std: "docker" "start" "-a" "9212b7fb71096873f39e6d8bb43297d8f9436d67e036f65ca5f7358ab962c574", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9212b7fb71096873f39e6d8bb43297d8f9436d67e036f65ca5f7358ab962c574", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9212b7fb71096873f39e6d8bb43297d8f9436d67e036f65ca5f7358ab962c574", kill_on_drop: false }`
[INFO] [stdout] 9212b7fb71096873f39e6d8bb43297d8f9436d67e036f65ca5f7358ab962c574
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3eb2232a082629f13acbc1d5f7e750d98cc25dc532434c2d3841edfff7cbba50
[INFO] running `Command { std: "docker" "start" "-a" "3eb2232a082629f13acbc1d5f7e750d98cc25dc532434c2d3841edfff7cbba50", kill_on_drop: false }`
[INFO] [stderr]    Compiling rworld v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `sync::Mutex`
[INFO] [stdout]  --> src/main.rs:1:46
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{cell::RefCell, io::Result, rc::Rc, sync::Mutex, thread, time::Duration};
[INFO] [stdout]   |                                              ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read_exact` found for mutable reference `&mut TcpStream` in the current scope
[INFO] [stdout]   --> src/network/tcp_session.rs:48:20
[INFO] [stdout]    |
[INFO] [stdout] 48 |             stream.read_exact()
[INFO] [stdout]    |                    ^^^^^^^^^^ method not found in `&mut TcpStream`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]    |
[INFO] [stdout] 1  | use std::io::Read;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/main.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | /     loop {
[INFO] [stdout] 38 | |         listener.update();
[INFO] [stdout] 39 | |
[INFO] [stdout] 40 | |         let mut nm = nmgr.borrow_mut();
[INFO] [stdout] ...  |
[INFO] [stdout] 43 | |         thread::sleep(Duration::from_millis(1));
[INFO] [stdout] 44 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 45 | 
[INFO] [stdout] 46 |       let mut nm = nmgr.borrow_mut();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[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 E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rworld` due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "3eb2232a082629f13acbc1d5f7e750d98cc25dc532434c2d3841edfff7cbba50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3eb2232a082629f13acbc1d5f7e750d98cc25dc532434c2d3841edfff7cbba50", kill_on_drop: false }`
[INFO] [stdout] 3eb2232a082629f13acbc1d5f7e750d98cc25dc532434c2d3841edfff7cbba50