warning: use of `unwrap_or_else` to construct default value
   --> volo-grpc/src/status.rs:454:18
    |
454 |                 .unwrap_or_else(Bytes::new);
    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_or_default
    = note: `#[warn(clippy::unwrap_or_default)]` on by default

warning: try not to call a closure in the expression where it is declared
   --> volo-thrift/src/codec/default/mod.rs:136:28
    |
136 |           let write_result = (|| async {
    |  ____________________________^
137 | |             self.linked_bytes.reset();
138 | |             // then we reserve the size of the message in the linked bytes
139 | |             self.linked_bytes.reserve(malloc_size);
...   |
158 | |             Ok::<(), crate::Error>(())
159 | |         })()
    | |____________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_closure_call
    = note: `#[warn(clippy::redundant_closure_call)]` on by default
help: try doing something like
    |
136 ~         let write_result = async async {
137 +             self.linked_bytes.reset();
138 +             // then we reserve the size of the message in the linked bytes
139 +             self.linked_bytes.reserve(malloc_size);
140 +             // after that, we encode the message into the linked bytes
141 +             self.encoder
142 +                 .encode(cx, &mut self.linked_bytes, msg)
143 +                 .map_err(|e| {
144 +                     // record the error time
145 +                     cx.stats_mut().record_encode_end_at();
146 +                     e
147 +                 })?;
148 + 
149 +             cx.stats_mut().record_encode_end_at();
150 +             cx.stats_mut().record_write_start_at(); // encode end is also write start
151 + 
152 +             self.linked_bytes
153 +                 .write_all_vectored(&mut self.writer)
154 +                 .await
155 +                 .map_err(TransportError::from)?;
156 +             self.writer.flush().await.map_err(TransportError::from)?;
157 + 
158 +             Ok::<(), crate::Error>(())
159 +         }
    |

warning: unneeded `return` statement
   --> volo-thrift/src/codec/default/ttheader.rs:136:13
    |
136 |             return self.inner.decode_async(cx, reader).await;
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
help: remove `return`
    |
136 -             return self.inner.decode_async(cx, reader).await;
136 +             self.inner.decode_async(cx, reader).await
    |

warning: unneeded `return` statement
   --> volo-thrift/src/codec/default/framed.rs:140:13
    |
140 |             return self.inner.decode_async(cx, reader).await;
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
    = note: `#[warn(clippy::needless_return)]` on by default
help: remove `return`
    |
140 -             return self.inner.decode_async(cx, reader).await;
140 +             self.inner.decode_async(cx, reader).await
    |

warning: using `Option.and_then(|x| Some(y))`, which is more succinctly expressed as `map(|x| y)`
   --> volo-thrift/src/client/mod.rs:602:13
    |
602 | /             cache
603 | |                 .pop()
604 | |                 .and_then(|mut cx| {
605 | |                     // The generated code only push the cx to the cache, we need to reset
...   |
634 | |                     Some(cx)
635 | |                 })
    | |__________________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bind_instead_of_map
    = note: `#[warn(clippy::bind_instead_of_map)]` on by default
help: try
    |
604 ~                 .map(|mut cx| {
605 |                     // The generated code only push the cx to the cache, we need to reset
  ...
633 |                     cx.rpc_info_mut().method = Some(FastStr::from_static_str(method));
634 ~                     cx
    |

warning: use of `or_insert_with` to construct default value
   --> volo-thrift/src/transport/pool/mod.rs:540:45
    |
540 |             let idle = self.idle.entry(key).or_insert_with(Vec::new);
    |                                             ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `or_default()`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_or_default
    = note: `#[warn(clippy::unwrap_or_default)]` on by default

warning: this function has too many arguments (8/7)
  --> volo-thrift/src/transport/pingpong/server.rs:21:1
   |
21 | / pub async fn serve<Svc, Req, Resp, E, D, SP>(
22 | |     mut encoder: E,
23 | |     mut decoder: D,
24 | |     notified: Notified<'_>,
...  |
36 | |     D: Decoder,
37 | |     SP: SpanProvider,
   | |_____________________^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
   = note: `#[warn(clippy::too_many_arguments)]` on by default

warning: useless conversion to the same type: `volo::FastStr`
   --> volo-build/src/thrift_backend.rs:163:66
    |
163 |                     let decode_item = helper.codegen_item_decode(args_name.clone().into());
    |                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `args_name.clone()`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion

warning: useless conversion to the same type: `volo::FastStr`
  --> volo-build/src/thrift_backend.rs:62:70
   |
62 |                     let decode_variants = helper.codegen_item_decode(args_name.clone().into());
   |                                                                      ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `args_name.clone()`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
   = note: `#[warn(clippy::useless_conversion)]` on by default

warning: this function can be simplified using the `async fn` syntax
  --> volo/src/client.rs:49:5
   |
49 | /     fn call<'cx>(
50 | |         self,
51 | |         cx: &'cx mut Cx,
52 | |         req: Req,
53 | |     ) -> impl Future<Output = Result<Self::Response, Self::Error>> + Send {
   | |_________________________________________________________________________^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_async_fn
   = note: `#[warn(clippy::manual_async_fn)]` on by default
help: make the function `async` and return the output of the future directly
   |
49 ~     async fn call<'cx>(
50 +         self,
51 +         cx: &'cx mut Cx,
52 +         req: Req,
53 ~     ) -> Result<Self::Response, Self::Error> {
   |
help: move the body of the async block to the enclosing function
   |
53 ~     ) -> impl Future<Output = Result<Self::Response, Self::Error>> + Send {
54 +         self.opt.apply(cx)?;
55 +         self.inner.call(cx, req).await
56 +     }
   |

warning: the following explicit lifetimes could be elided: 'cx
  --> volo/src/client.rs:49:13
   |
49 |     fn call<'cx>(
   |             ^^^
50 |         self,
51 |         cx: &'cx mut Cx,
   |              ^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
help: elide the lifetimes
   |
49 ~     fn call'_>(
50 |         self,
51 ~         cx: &mut Cx,
   |

warning: the following explicit lifetimes could be elided: 'cx
  --> volo/src/client.rs:30:13
   |
30 |     fn call<'cx>(
   |             ^^^
31 |         self,
32 |         cx: &'cx mut Cx,
   |              ^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
   = note: `#[warn(clippy::needless_lifetimes)]` on by default
help: elide the lifetimes
   |
30 ~     fn call'_>(
31 |         self,
32 ~         cx: &mut Cx,
   |

warning: unneeded `return` statement
   --> volo/src/hotrestart/mod.rs:415:17
    |
415 |                 return Err(e);
    |                 ^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
help: remove `return`
    |
415 -                 return Err(e);
415 +                 Err(e)
    |

warning: unneeded `return` statement
   --> volo/src/hotrestart/mod.rs:409:17
    |
409 | /                 return Err(io::Error::new(
410 | |                     io::ErrorKind::InvalidData,
411 | |                     "Not PassFdResponse",
412 | |                 ));
    | |__________________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
help: remove `return`
    |
409 ~                 Err(io::Error::new(
410 +                     io::ErrorKind::InvalidData,
411 +                     "Not PassFdResponse",
412 ~                 ))
    |

warning: unneeded `return` statement
   --> volo/src/hotrestart/mod.rs:406:17
    |
406 |                 return Ok(Some(fd));
    |                 ^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
help: remove `return`
    |
406 -                 return Ok(Some(fd));
406 +                 Ok(Some(fd))
    |

warning: useless conversion to the same type: `std::io::Error`
   --> volo/src/hotrestart/mod.rs:279:28
    |
279 |                 return Err(e.into());
    |                            ^^^^^^^^ help: consider removing `.into()`: `e`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
    = note: `#[warn(clippy::useless_conversion)]` on by default

warning: unneeded `return` statement
   --> volo/src/hotrestart/mod.rs:279:17
    |
279 |                 return Err(e.into());
    |                 ^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
help: remove `return`
    |
279 -                 return Err(e.into());
279 +                 Err(e.into())
    |

warning: unneeded `return` statement
   --> volo/src/hotrestart/mod.rs:274:25
    |
274 |                         return Err(io::Error::new(io::ErrorKind::InvalidData, e.message));
    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
help: remove `return`
    |
274 -                         return Err(io::Error::new(io::ErrorKind::InvalidData, e.message));
274 +                         Err(io::Error::new(io::ErrorKind::InvalidData, e.message))
    |

warning: unneeded `return` statement
   --> volo/src/hotrestart/mod.rs:270:29
    |
270 | ...                   return Ok(HotRestartMessage::TerminateParentRequest);
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
help: remove `return`
    |
270 -                             return Ok(HotRestartMessage::TerminateParentRequest);
270 +                             Ok(HotRestartMessage::TerminateParentRequest)
    |

warning: unneeded `return` statement
   --> volo/src/hotrestart/mod.rs:263:33
    |
263 | / ...                   return Err(io::Error::new(
264 | | ...                       io::ErrorKind::InvalidData,
265 | | ...                       "PassFdResponse without fd",
266 | | ...                   ));
    | |________________________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
help: remove `return`
    |
263 ~                                 Err(io::Error::new(
264 +                                     io::ErrorKind::InvalidData,
265 +                                     "PassFdResponse without fd",
266 ~                                 ))
    |

warning: unneeded `return` statement
   --> volo/src/hotrestart/mod.rs:261:33
    |
261 | ...                   return Ok(HotRestartMessage::PassFdResponse(fd));
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
help: remove `return`
    |
261 -                                 return Ok(HotRestartMessage::PassFdResponse(fd));
261 +                                 Ok(HotRestartMessage::PassFdResponse(fd))
    |

warning: unneeded `return` statement
   --> volo/src/hotrestart/mod.rs:250:29
    |
250 | ...                   return Ok(HotRestartMessage::PassFdRequest(addr));
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
    = note: `#[warn(clippy::needless_return)]` on by default
help: remove `return`
    |
250 -                             return Ok(HotRestartMessage::PassFdRequest(addr));
250 +                             Ok(HotRestartMessage::PassFdRequest(addr))
    |

warning: you should consider adding a `Default` implementation for `HotRestart`
   --> volo/src/hotrestart/mod.rs:107:5
    |
107 | /     pub fn new() -> Self {
108 | |         HotRestart {
109 | |             state: Arc::new(Mutex::new(HotRestartState::Uninitalized)),
110 | |             listener_fds: Arc::new(StdMutex::new(HashMap::new())),
...   |
116 | |         }
117 | |     }
    | |_____^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
    = note: `#[warn(clippy::new_without_default)]` on by default
help: try adding this
    |
106 + impl Default for HotRestart {
107 +     fn default() -> Self {
108 +         Self::new()
109 +     }
110 + }
    |

warning: the borrowed expression implements the required traits
   --> volo/src/net/incoming.rs:297:34
    |
297 |             std::fs::remove_file(&path)?;
    |                                  ^^^^^ help: change this to: `path`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args
    = note: `#[warn(clippy::needless_borrows_for_generic_args)]` on by default

warning: casting to the same type is unnecessary (`i32` -> `i32`)
   --> volo/src/net/incoming.rs:238:13
    |
238 |             libc::SOMAXCONN as i32
    |             ^^^^^^^^^^^^^^^^^^^^^^ help: try: `libc::SOMAXCONN`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast