automated clippy fixes

server/db/db.rs

@@ -2444,7 +2444,7 @@ pub struct DatabaseGuard<'db, C: Clocks> {
     _timer: clock::TimerGuard<'db, C, &'static str, fn() -> &'static str>,
 }
 
-impl<'db, C: Clocks + Clone> DatabaseGuard<'db, C> {
+impl<C: Clocks + Clone> DatabaseGuard<'_, C> {
     /// Tries to flush unwritten changes from the stream directories.
     ///
     ///    * commits any recordings added with `add_recording` that have since been marked as
@@ -2459,14 +2459,14 @@ impl<'db, C: Clocks + Clone> DatabaseGuard<'db, C> {
     }
 }
 
-impl<'db, C: Clocks + Clone> ::std::ops::Deref for DatabaseGuard<'db, C> {
+impl<C: Clocks + Clone> ::std::ops::Deref for DatabaseGuard<'_, C> {
     type Target = LockedDatabase;
     fn deref(&self) -> &LockedDatabase {
         &self.db
     }
 }
 
-impl<'db, C: Clocks + Clone> ::std::ops::DerefMut for DatabaseGuard<'db, C> {
+impl<C: Clocks + Clone> ::std::ops::DerefMut for DatabaseGuard<'_, C> {
     fn deref_mut(&mut self) -> &mut LockedDatabase {
         &mut self.db
     }

server/db/recording.rs

@@ -395,10 +395,7 @@ impl Segment {
             if let Err(e) = f(&it) {
                 return Err(e);
             }
-            have_frame = match it.next(data) {
-                Err(e) => return Err(e),
-                Ok(hf) => hf,
-            };
+            have_frame = it.next(data)?;
         }
         if key_frame < self.key_frames {
             bail!(

server/db/writer.rs

@@ -985,7 +985,7 @@ impl<F: FileWriter> InnerWriter<F> {
     }
 }
 
-impl<'a, C: Clocks + Clone, D: DirWriter> Drop for Writer<'a, C, D> {
+impl<C: Clocks + Clone, D: DirWriter> Drop for Writer<'_, C, D> {
     fn drop(&mut self) {
         if ::std::thread::panicking() {
             // This will probably panic again. Don't do it.