[INFO] cloning repository https://github.com/mingmamma/rust-web-servers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mingmamma/rust-web-servers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingmamma%2Frust-web-servers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingmamma%2Frust-web-servers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7dd20aea37c13b76a3502086e7b4410ab31959bd
[INFO] checking mingmamma/rust-web-servers against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingmamma%2Frust-web-servers" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mingmamma/rust-web-servers
[INFO] finished tweaking git repo https://github.com/mingmamma/rust-web-servers
[INFO] tweaked toml for git repo https://github.com/mingmamma/rust-web-servers written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mingmamma/rust-web-servers on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mingmamma/rust-web-servers 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 43eddd21f3c16ae302cbe7c39123ca2d9da950b365de54caffbf6bd98ab31a8a
[INFO] running `Command { std: "docker" "start" "-a" "43eddd21f3c16ae302cbe7c39123ca2d9da950b365de54caffbf6bd98ab31a8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43eddd21f3c16ae302cbe7c39123ca2d9da950b365de54caffbf6bd98ab31a8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43eddd21f3c16ae302cbe7c39123ca2d9da950b365de54caffbf6bd98ab31a8a", kill_on_drop: false }`
[INFO] [stdout] 43eddd21f3c16ae302cbe7c39123ca2d9da950b365de54caffbf6bd98ab31a8a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9269892c2c410346a5a6783a9cc3c37cfeba4a7d4878c3c8f11267a7ba42720e
[INFO] running `Command { std: "docker" "start" "-a" "9269892c2c410346a5a6783a9cc3c37cfeba4a7d4878c3c8f11267a7ba42720e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.154
[INFO] [stderr]     Checking bitflags v2.5.0
[INFO] [stderr]     Checking epoll v4.3.3
[INFO] [stderr]     Checking rust-web-servers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `task`
[INFO] [stdout]    --> src/async-future.rs:209:28
[INFO] [stdout]     |
[INFO] [stdout] 209 |             while let Some(task) = self.runnable_tasks.lock().unwrap().pop_front() {
[INFO] [stdout]     |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_task`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `connection` and `connection_state` are never read
[INFO] [stdout]   --> src/async-future.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct ConnectionHandler {
[INFO] [stdout]    |        ----------------- fields in this struct
[INFO] [stdout] 54 |     connection: TcpStream,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 55 |     connection_state: ConnectionState,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Reading` and `Writing` are never constructed
[INFO] [stdout]    --> src/async-future.rs:114:5
[INFO] [stdout]     |
[INFO] [stdout] 112 | enum ConnectionState {
[INFO] [stdout]     |      --------------- variants in this enum
[INFO] [stdout] 113 |     ToStart,
[INFO] [stdout] 114 |     Reading {
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 118 |     Writing {
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `poll` is never used
[INFO] [stdout]    --> src/async-future.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 134 |     pub trait Future {
[INFO] [stdout]     |               ------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 137 |         fn poll(&mut self, waker: Waker) -> Option<Self::Output>;
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `wake_fn` is never read
[INFO] [stdout]    --> src/async-future.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 140 |     pub struct Waker {
[INFO] [stdout]     |                ----- field in this struct
[INFO] [stdout] 141 |         wake_fn: Box<dyn Fn()>
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `wake` is never used
[INFO] [stdout]    --> src/async-future.rs:145:12
[INFO] [stdout]     |
[INFO] [stdout] 144 |     impl Waker {
[INFO] [stdout]     |     ---------- method in this implementation
[INFO] [stdout] 145 |         fn wake(&self) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `remove` and `wait` are never used
[INFO] [stdout]    --> src/async-future.rs:173:16
[INFO] [stdout]     |
[INFO] [stdout] 159 |     impl Reactor {
[INFO] [stdout]     |     ------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 173 |         pub fn remove(&self, fd: RawFd) {
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 177 |         pub fn wait(&self) {
[INFO] [stdout]     |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Executor` is never constructed
[INFO] [stdout]    --> src/async-future.rs:225:12
[INFO] [stdout]     |
[INFO] [stdout] 225 |     struct Executor {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `spawn` is never used
[INFO] [stdout]    --> src/async-future.rs:230:12
[INFO] [stdout]     |
[INFO] [stdout] 229 |     impl Executor {
[INFO] [stdout]     |     ------------- method in this implementation
[INFO] [stdout] 230 |         fn spawn(&mut self, task: impl Future<Output = ()> + 'static) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `task`
[INFO] [stdout]    --> src/async-future.rs:209:28
[INFO] [stdout]     |
[INFO] [stdout] 209 |             while let Some(task) = self.runnable_tasks.lock().unwrap().pop_front() {
[INFO] [stdout]     |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_task`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `ToAcceptConn` is never constructed
[INFO] [stdout]   --> src/async-future.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 9  |     enum Main {
[INFO] [stdout]    |          ---- variant in this enum
[INFO] [stdout] 10 |         ToStartServer,
[INFO] [stdout] 11 |         ToAcceptConn(TcpListener),
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ConnectionHandler` is never constructed
[INFO] [stdout]   --> src/async-future.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct ConnectionHandler {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ConnectionState` is never used
[INFO] [stdout]    --> src/async-future.rs:112:6
[INFO] [stdout]     |
[INFO] [stdout] 112 | enum ConnectionState {
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `poll` is never used
[INFO] [stdout]    --> src/async-future.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 134 |     pub trait Future {
[INFO] [stdout]     |               ------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 137 |         fn poll(&mut self, waker: Waker) -> Option<Self::Output>;
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Waker` is never constructed
[INFO] [stdout]    --> src/async-future.rs:140:16
[INFO] [stdout]     |
[INFO] [stdout] 140 |     pub struct Waker {
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `wake` is never used
[INFO] [stdout]    --> src/async-future.rs:145:12
[INFO] [stdout]     |
[INFO] [stdout] 144 |     impl Waker {
[INFO] [stdout]     |     ---------- method in this implementation
[INFO] [stdout] 145 |         fn wake(&self) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Reactor` is never constructed
[INFO] [stdout]    --> src/async-future.rs:154:16
[INFO] [stdout]     |
[INFO] [stdout] 154 |     pub struct Reactor {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add`, `remove`, and `wait` are never used
[INFO] [stdout]    --> src/async-future.rs:160:12
[INFO] [stdout]     |
[INFO] [stdout] 159 |     impl Reactor {
[INFO] [stdout]     |     ------------ associated items in this implementation
[INFO] [stdout] 160 |         fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 167 |         pub fn add(&self, fd: RawFd, waker: Waker) {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 173 |         pub fn remove(&self, fd: RawFd) {
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 177 |         pub fn wait(&self) {
[INFO] [stdout]     |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Executor` is never constructed
[INFO] [stdout]    --> src/async-future.rs:225:12
[INFO] [stdout]     |
[INFO] [stdout] 225 |     struct Executor {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `spawn` is never used
[INFO] [stdout]    --> src/async-future.rs:230:12
[INFO] [stdout]     |
[INFO] [stdout] 229 |     impl Executor {
[INFO] [stdout]     |     ------------- method in this implementation
[INFO] [stdout] 230 |         fn spawn(&mut self, task: impl Future<Output = ()> + 'static) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.81s
[INFO] running `Command { std: "docker" "inspect" "9269892c2c410346a5a6783a9cc3c37cfeba4a7d4878c3c8f11267a7ba42720e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9269892c2c410346a5a6783a9cc3c37cfeba4a7d4878c3c8f11267a7ba42720e", kill_on_drop: false }`
[INFO] [stdout] 9269892c2c410346a5a6783a9cc3c37cfeba4a7d4878c3c8f11267a7ba42720e