warning: this expression creates a reference which is immediately dereferenced by the compiler
    --> src/service/local.rs:1199:27
     |
1199 |             ConfigDisplay(&self),
     |                           ^^^^^ help: change this to: `self`
     |
     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
     = note: `#[warn(clippy::needless_borrow)]` on by default

warning: value assigned to `is_first` is never read
    --> src/service/local.rs:1173:21
     |
1173 |                     is_first = false;
     |                     ^^^^^^^^
     |
     = help: maybe it is overwritten before being read?
     = note: `#[warn(unused_assignments)]` on by default

warning: variable `is_first` is assigned to, but never used
    --> src/service/local.rs:1169:25
     |
1169 |                 let mut is_first = true;
     |                         ^^^^^^^^
     |
     = note: consider using `_is_first` instead
     = note: `#[warn(unused_variables)]` on by default

warning: variable does not need to be mutable
    --> src/service/local.rs:1246:17
     |
1246 |             let mut has_things_to_do = arc_self.config_path.is_some();
     |                 ----^^^^^^^^^^^^^^^^
     |                 |
     |                 help: remove this `mut`
     |
     = note: `#[warn(unused_mut)]` on by default

warning: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
   --> crates/shadowsocks-service/src/local/tun/mod.rs:201:24
    |
201 |                     if n <= IFF_PI_PREFIX_LEN {
    |                        ^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: because `IFF_PI_PREFIX_LEN` is the minimum value for this type, the case where the two sides are not equal never occurs, consider using `n == IFF_PI_PREFIX_LEN` instead
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
    = note: requested on the command line with `-W clippy::absurd-extreme-comparisons`

warning: transmute used without annotations
   --> crates/shadowsocks-service/src/local/tun/tcp.rs:172:38
    |
172 |         let recv_buf = unsafe { mem::transmute::<_, &mut [u8]>(buf.unfilled_mut()) };
    |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider adding missing annotations: `transmute::<&mut [std::mem::MaybeUninit<u8>], &mut [u8]>`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#missing_transmute_annotations
    = note: `#[warn(clippy::missing_transmute_annotations)]` on by default

warning: field assignment outside of initializer for an instance created with Default::default()
   --> crates/shadowsocks-service/src/local/fake_dns/manager.rs:197:13
    |
197 |             c.ipv4_network = ipv4_network_str;
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
note: consider initializing the variable with `local::fake_dns::proto::StorageMeta { ipv4_network: ipv4_network_str, ipv6_network: ipv6_network_str, version: FAKE_DNS_MANAGER_STORAGE_VERSION }` and removing relevant reassignments
   --> crates/shadowsocks-service/src/local/fake_dns/manager.rs:196:13
    |
196 |             let mut c = proto::StorageMeta::default();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#field_reassign_with_default
    = note: `#[warn(clippy::field_reassign_with_default)]` on by default

warning: this operation has no effect
   --> crates/shadowsocks-service/src/local/fake_dns/manager.rs:167:34
    |
167 |             .flush_every_ms(Some(1 * 1000))
    |                                  ^^^^^^^^ help: consider reducing it to: `1000`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
    = note: `#[warn(clippy::identity_op)]` on by default