[INFO] cloning repository https://github.com/hqt/tcpserver-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hqt/tcpserver-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhqt%2Ftcpserver-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhqt%2Ftcpserver-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ca81a994938c45083a5bf5ba6ced438e4c49af64
[INFO] testing hqt/tcpserver-rust against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhqt%2Ftcpserver-rust" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hqt/tcpserver-rust on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hqt/tcpserver-rust
[INFO] finished tweaking git repo https://github.com/hqt/tcpserver-rust
[INFO] tweaked toml for git repo https://github.com/hqt/tcpserver-rust written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/hqt/tcpserver-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a915ca735775b63d3ef0339d532a8c225c5b8efd4a0cc7fd9c34c5b14b3c030a
[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" "a915ca735775b63d3ef0339d532a8c225c5b8efd4a0cc7fd9c34c5b14b3c030a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a915ca735775b63d3ef0339d532a8c225c5b8efd4a0cc7fd9c34c5b14b3c030a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a915ca735775b63d3ef0339d532a8c225c5b8efd4a0cc7fd9c34c5b14b3c030a", kill_on_drop: false }`
[INFO] [stdout] a915ca735775b63d3ef0339d532a8c225c5b8efd4a0cc7fd9c34c5b14b3c030a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "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] 349772455aa4742d80a7c357c42a322b0eebd518c1ed5ad8871d1424b790466f
[INFO] running `Command { std: "docker" "start" "-a" "349772455aa4742d80a7c357c42a322b0eebd518c1ed5ad8871d1424b790466f", kill_on_drop: false }`
[INFO] [stderr]    Compiling client v0.1.0 (/opt/rustwide/workdir/client)
[INFO] [stderr]    Compiling server v0.1.0 (/opt/rustwide/workdir/server)
[INFO] [stdout] warning: unused imports: `Read`, `Write`
[INFO] [stdout]  --> server/src/client_manager.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::{Write, Read};
[INFO] [stdout]   |               ^^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `MutexGuard`, `Mutex`
[INFO] [stdout]  --> server/src/server.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::{Arc, Mutex, MutexGuard};
[INFO] [stdout]   |                      ^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> server/src/server.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> server/src/server.rs:32:51
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn start_test_server(&mut self) -> Result<(String), io::Error> {
[INFO] [stdout]    |                                                   ^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `server`
[INFO] [stdout]   --> server/src/server.rs:80:18
[INFO] [stdout]    |
[INFO] [stdout] 80 | fn handle_client(server: Arc<ServerCore>, mut stream: TcpStream) {
[INFO] [stdout]    |                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_server`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `counter`
[INFO] [stdout]  --> server/src/id_generator.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     counter: AtomicUsize
[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: `next_id`
[INFO] [stdout]   --> server/src/id_generator.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn next_id(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `id_generator`
[INFO] [stdout]  --> server/src/client_manager.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     id_generator: IDGenerator,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `clients`
[INFO] [stdout]  --> server/src/client_manager.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     clients: HashMap<usize, TcpStream>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_client`
[INFO] [stdout]   --> server/src/client_manager.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn add_client(&mut self, conn: TcpStream) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `TEST_PORT`
[INFO] [stdout]   --> server/src/server.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | static TEST_PORT: AtomicUsize = AtomicUsize::new(20_000);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `listener`
[INFO] [stdout]   --> server/src/server.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     listener: Option<TcpListener>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `client_managers`
[INFO] [stdout]   --> server/src/server.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     client_managers: ClientManager,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `start_test_server`
[INFO] [stdout]   --> server/src/server.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn start_test_server(&mut self) -> Result<(String), io::Error> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> server/src/server.rs:94:24
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 panic!(err);
[INFO] [stdout]    |                        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 panic!("{}", err);
[INFO] [stdout]    |                        ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 std::panic::panic_any(err);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]  --> server/src/main.rs:9:26
[INFO] [stdout]   |
[INFO] [stdout] 9 |         Err(e) => panic!(e),
[INFO] [stdout]   |                          ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]   |
[INFO] [stdout] 9 |         Err(e) => panic!("{}", e),
[INFO] [stdout]   |                          ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]   |
[INFO] [stdout] 9 |         Err(e) => std::panic::panic_any(e),
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.21s
[INFO] running `Command { std: "docker" "inspect" "349772455aa4742d80a7c357c42a322b0eebd518c1ed5ad8871d1424b790466f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "349772455aa4742d80a7c357c42a322b0eebd518c1ed5ad8871d1424b790466f", kill_on_drop: false }`
[INFO] [stdout] 349772455aa4742d80a7c357c42a322b0eebd518c1ed5ad8871d1424b790466f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8e1bce39dfc3ac11fa18cfd68e41e1ba4fda051e5f923a4b8b70a0cf2054bc48
[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" "8e1bce39dfc3ac11fa18cfd68e41e1ba4fda051e5f923a4b8b70a0cf2054bc48", kill_on_drop: false }`
[INFO] [stderr]    Compiling client v0.1.0 (/opt/rustwide/workdir/client)
[INFO] [stderr]    Compiling server v0.1.0 (/opt/rustwide/workdir/server)
[INFO] [stdout] warning: unused imports: `Read`, `Write`
[INFO] [stdout]  --> server/src/client_manager.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::{Write, Read};
[INFO] [stdout]   |               ^^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::id_generator::IDGenerator`
[INFO] [stdout]   --> server/src/client_manager.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     use crate::id_generator::IDGenerator;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `MutexGuard`, `Mutex`
[INFO] [stdout]  --> server/src/server.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::{Arc, Mutex, MutexGuard};
[INFO] [stdout]   |                      ^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> server/src/server.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> server/src/server.rs:32:51
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn start_test_server(&mut self) -> Result<(String), io::Error> {
[INFO] [stdout]    |                                                   ^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `server`
[INFO] [stdout]   --> server/src/server.rs:80:18
[INFO] [stdout]    |
[INFO] [stdout] 80 | fn handle_client(server: Arc<ServerCore>, mut stream: TcpStream) {
[INFO] [stdout]    |                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_server`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `id_generator`
[INFO] [stdout]  --> server/src/client_manager.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     id_generator: IDGenerator,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `clients`
[INFO] [stdout]  --> server/src/client_manager.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     clients: HashMap<usize, TcpStream>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_client`
[INFO] [stdout]   --> server/src/client_manager.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn add_client(&mut self, conn: TcpStream) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `listener`
[INFO] [stdout]   --> server/src/server.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     listener: Option<TcpListener>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `client_managers`
[INFO] [stdout]   --> server/src/server.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     client_managers: ClientManager,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> server/src/server.rs:94:24
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 panic!(err);
[INFO] [stdout]    |                        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 panic!("{}", err);
[INFO] [stdout]    |                        ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 std::panic::panic_any(err);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]  --> server/src/main.rs:9:26
[INFO] [stdout]   |
[INFO] [stdout] 9 |         Err(e) => panic!(e),
[INFO] [stdout]   |                          ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]   |
[INFO] [stdout] 9 |         Err(e) => panic!("{}", e),
[INFO] [stdout]   |                          ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]   |
[INFO] [stdout] 9 |         Err(e) => std::panic::panic_any(e),
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.22s
[INFO] running `Command { std: "docker" "inspect" "8e1bce39dfc3ac11fa18cfd68e41e1ba4fda051e5f923a4b8b70a0cf2054bc48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e1bce39dfc3ac11fa18cfd68e41e1ba4fda051e5f923a4b8b70a0cf2054bc48", kill_on_drop: false }`
[INFO] [stdout] 8e1bce39dfc3ac11fa18cfd68e41e1ba4fda051e5f923a4b8b70a0cf2054bc48
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 73e24d0fca8203b5b4f911c64a45df5f5bce27f8c771b1c8aae7ab10ebd57a28
[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" "73e24d0fca8203b5b4f911c64a45df5f5bce27f8c771b1c8aae7ab10ebd57a28", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Read`, `Write`
[INFO] [stderr]  --> server/src/client_manager.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{Write, Read};
[INFO] [stderr]   |               ^^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::id_generator::IDGenerator`
[INFO] [stderr]   --> server/src/client_manager.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     use crate::id_generator::IDGenerator;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `MutexGuard`, `Mutex`
[INFO] [stderr]  --> server/src/server.rs:6:22
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::sync::{Arc, Mutex, MutexGuard};
[INFO] [stderr]   |                      ^^^^^  ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::borrow::Borrow`
[INFO] [stderr]  --> server/src/server.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::borrow::Borrow;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> server/src/server.rs:32:51
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn start_test_server(&mut self) -> Result<(String), io::Error> {
[INFO] [stderr]    |                                                   ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `server`
[INFO] [stderr]   --> server/src/server.rs:80:18
[INFO] [stderr]    |
[INFO] [stderr] 80 | fn handle_client(server: Arc<ServerCore>, mut stream: TcpStream) {
[INFO] [stderr]    |                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_server`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `id_generator`
[INFO] [stderr]  --> server/src/client_manager.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     id_generator: IDGenerator,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `clients`
[INFO] [stderr]  --> server/src/client_manager.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     clients: HashMap<usize, TcpStream>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `add_client`
[INFO] [stderr]   --> server/src/client_manager.rs:19:12
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn add_client(&mut self, conn: TcpStream) {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `listener`
[INFO] [stderr]   --> server/src/server.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     listener: Option<TcpListener>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `client_managers`
[INFO] [stderr]   --> server/src/server.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     client_managers: ClientManager,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> server/src/server.rs:94:24
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 panic!(err);
[INFO] [stderr]    |                        ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stderr]    = note: this is no longer accepted in Rust 2021
[INFO] [stderr] help: add a "{}" format string to Display the message
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 panic!("{}", err);
[INFO] [stderr]    |                        ^^^^^
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 std::panic::panic_any(err);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]  --> server/src/main.rs:9:26
[INFO] [stderr]   |
[INFO] [stderr] 9 |         Err(e) => panic!(e),
[INFO] [stderr]   |                          ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: this is no longer accepted in Rust 2021
[INFO] [stderr] help: add a "{}" format string to Display the message
[INFO] [stderr]   |
[INFO] [stderr] 9 |         Err(e) => panic!("{}", e),
[INFO] [stderr]   |                          ^^^^^
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]   |
[INFO] [stderr] 9 |         Err(e) => std::panic::panic_any(e),
[INFO] [stderr]   |                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/client-bdc92186d74c4435)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/server-c17d24da776a431e)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test id_generator::id_generator_test::next_id ... ok
[INFO] [stdout] test client_manager::client_manager_test::add_client ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "73e24d0fca8203b5b4f911c64a45df5f5bce27f8c771b1c8aae7ab10ebd57a28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73e24d0fca8203b5b4f911c64a45df5f5bce27f8c771b1c8aae7ab10ebd57a28", kill_on_drop: false }`
[INFO] [stdout] 73e24d0fca8203b5b4f911c64a45df5f5bce27f8c771b1c8aae7ab10ebd57a28