chore: address clippy lints for Rust 1.86.0-beta

Pull-Request: #5876.

Author: elenaf9

misc/quick-protobuf-codec/src/lib.rs

@@ -252,7 +252,7 @@ mod tests {
 
         let mut src = BytesMut::new();
         src.extend_from_slice(encoded_length);
-        src.extend(std::iter::repeat(0).take(length));
+        src.extend(std::iter::repeat_n(0, length));
         src
     }
 

protocols/autonat/src/v2/client/handler/dial_request.rs

@@ -2,7 +2,7 @@ use std::{
     collections::VecDeque,
     convert::Infallible,
     io,
-    iter::{once, repeat},
+    iter::{once, repeat_n},
     task::{Context, Poll},
     time::Duration,
 };
@@ -326,8 +326,7 @@ where
 {
     let count_full = num_bytes / DATA_FIELD_LEN_UPPER_BOUND;
     let partial_len = num_bytes % DATA_FIELD_LEN_UPPER_BOUND;
-    for req in repeat(DATA_FIELD_LEN_UPPER_BOUND)
-        .take(count_full)
+    for req in repeat_n(DATA_FIELD_LEN_UPPER_BOUND, count_full)
         .chain(once(partial_len))
         .filter(|e| *e > 0)
         .map(|data_count| {

protocols/kad/src/kbucket/key.rs

@@ -17,6 +17,7 @@
 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 // DEALINGS IN THE SOFTWARE.
+#![allow(clippy::manual_div_ceil)]
 
 use std::{
     borrow::Borrow,

protocols/kad/src/lib.rs

@@ -88,7 +88,7 @@ pub use record::{store, Key as RecordKey, ProviderRecord, Record};
 /// DHT should agree on the choices made for (1) and (2).
 ///
 /// The current value is `20`.
-pub const K_VALUE: NonZeroUsize = unsafe { NonZeroUsize::new_unchecked(20) };
+pub const K_VALUE: NonZeroUsize = NonZeroUsize::new(20).unwrap();
 
 /// The `α` parameter of the Kademlia specification.
 ///
@@ -98,7 +98,7 @@ pub const K_VALUE: NonZeroUsize = unsafe { NonZeroUsize::new_unchecked(20) };
 /// locating the closest peers to a key.
 ///
 /// The current value is `3`.
-pub const ALPHA_VALUE: NonZeroUsize = unsafe { NonZeroUsize::new_unchecked(3) };
+pub const ALPHA_VALUE: NonZeroUsize = NonZeroUsize::new(3).unwrap();
 
 pub const PROTOCOL_NAME: StreamProtocol = protocol::DEFAULT_PROTO_NAME;
 

transports/webrtc/src/tokio/udp_mux.rs

@@ -561,7 +561,7 @@ fn ufrag_from_stun_message(buffer: &[u8], local_ufrag: bool) -> Result<String, E
                 let res = if local_ufrag {
                     s.split(':').next()
                 } else {
-                    s.split(':').last()
+                    s.split(':').next_back()
                 };
                 match res {
                     Some(s) => Ok(s.to_owned()),