[INFO] cloning repository https://github.com/sivese/rs-server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sivese/rs-server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsivese%2Frs-server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsivese%2Frs-server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f5908492668dd3ef4da1ee08beb73c612e9e7db2
[INFO] checking sivese/rs-server against try#51b1964e35e5e26f8cd938940f0da6f7b5cc54fc for pr-138176
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsivese%2Frs-server" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sivese/rs-server on toolchain 51b1964e35e5e26f8cd938940f0da6f7b5cc54fc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+51b1964e35e5e26f8cd938940f0da6f7b5cc54fc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sivese/rs-server
[INFO] finished tweaking git repo https://github.com/sivese/rs-server
[INFO] tweaked toml for git repo https://github.com/sivese/rs-server written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/sivese/rs-server 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" "+51b1964e35e5e26f8cd938940f0da6f7b5cc54fc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+51b1964e35e5e26f8cd938940f0da6f7b5cc54fc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 53efba5790d0e2d6ea583c71da63812a24ab95b9c951da3711414df418700a42
[INFO] running `Command { std: "docker" "start" "-a" "53efba5790d0e2d6ea583c71da63812a24ab95b9c951da3711414df418700a42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53efba5790d0e2d6ea583c71da63812a24ab95b9c951da3711414df418700a42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53efba5790d0e2d6ea583c71da63812a24ab95b9c951da3711414df418700a42", kill_on_drop: false }`
[INFO] [stdout] 53efba5790d0e2d6ea583c71da63812a24ab95b9c951da3711414df418700a42
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+51b1964e35e5e26f8cd938940f0da6f7b5cc54fc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9da81f152c6a2eab5a4912907b3557e5c8a0184a4a62bdb335d6cd2c265e2112
[INFO] running `Command { std: "docker" "start" "-a" "9da81f152c6a2eab5a4912907b3557e5c8a0184a4a62bdb335d6cd2c265e2112", kill_on_drop: false }`
[INFO] [stderr]     Checking server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::thread::pool::ThreadPool`
[INFO] [stdout]  --> src/svr/server.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::thread::pool::ThreadPool;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::net::TcpListener`
[INFO] [stdout]   --> src/svr/server.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::net::TcpListener;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file`
[INFO] [stdout]   --> src/svr/server.rs:23:18
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let (status, file) = if buffer.starts_with(get) {
[INFO] [stdout]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file`
[INFO] [stdout]   --> src/svr/server.rs:23:18
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let (status, file) = if buffer.starts_with(get) {
[INFO] [stdout]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pool`
[INFO] [stdout]   --> src/svr/server.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let pool = ThreadPool::new(4);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_pool`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Server` is never constructed
[INFO] [stdout]  --> src/svr/server.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Server{
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handle_connection` is never used
[INFO] [stdout]   --> src/svr/server.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn handle_connection(mut stream : TcpStream) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ThreadPool` is never constructed
[INFO] [stdout]  --> src/thread/pool.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct ThreadPool {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Job` is never used
[INFO] [stdout]   --> src/thread/pool.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | type Job = Box<dyn FnOnce() + Send + 'static>;
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `execute` are never used
[INFO] [stdout]   --> src/thread/pool.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl ThreadPool {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 15 |     pub fn new(size : usize) -> ThreadPool {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn execute<F>(&self, f : F)  where F : FnOnce() + Send + 'static, {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Worker` is never constructed
[INFO] [stdout]   --> src/thread/pool.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | struct Worker {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/thread/pool.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl Worker {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 41 |     fn new(id : usize, receiver : Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: path statement drops value
[INFO] [stdout]   --> src/thread/pool.rs:45:17
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 job;
[INFO] [stdout]    |                 ^^^^ help: use `drop` to clarify the intent: `drop(job);`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(path_statements)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Server` is never constructed
[INFO] [stdout]  --> src/svr/server.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Server{
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `threads` and `sender` are never read
[INFO] [stdout]  --> src/thread/pool.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct ThreadPool {
[INFO] [stdout]   |            ---------- fields in this struct
[INFO] [stdout] 8 |     threads : Vec<Worker>,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 9 |     sender : mpsc::Sender<Job>
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `execute` is never used
[INFO] [stdout]   --> src/thread/pool.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl ThreadPool {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn execute<F>(&self, f : F)  where F : FnOnce() + Send + 'static, {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `thread` are never read
[INFO] [stdout]   --> src/thread/pool.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | struct Worker {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 36 |     id : usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 37 |     thread : thread::JoinHandle<()>
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: path statement drops value
[INFO] [stdout]   --> src/thread/pool.rs:45:17
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 job;
[INFO] [stdout]    |                 ^^^^ help: use `drop` to clarify the intent: `drop(job);`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(path_statements)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed `FnOnce` trait object that must be used
[INFO] [stdout]   --> src/thread/pool.rs:45:17
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 job;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: closures are lazy and do nothing unless called
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed `FnOnce` trait object that must be used
[INFO] [stdout]   --> src/thread/pool.rs:45:17
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 job;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: closures are lazy and do nothing unless called
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "9da81f152c6a2eab5a4912907b3557e5c8a0184a4a62bdb335d6cd2c265e2112", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9da81f152c6a2eab5a4912907b3557e5c8a0184a4a62bdb335d6cd2c265e2112", kill_on_drop: false }`
[INFO] [stdout] 9da81f152c6a2eab5a4912907b3557e5c8a0184a4a62bdb335d6cd2c265e2112