diff --git a/src/cargo/core/compiler/fingerprint.rs b/src/cargo/core/compiler/fingerprint.rs
index 6acb67f6386..4c1674b1493 100644
--- a/src/cargo/core/compiler/fingerprint.rs
+++ b/src/cargo/core/compiler/fingerprint.rs
@@ -833,10 +833,9 @@ impl Fingerprint {
             let (dep_path, dep_mtime) = if dep.only_requires_rmeta {
                 dep_mtimes
                     .iter()
-                    .filter(|(path, _mtime)| {
+                    .find(|(path, _mtime)| {
                         path.extension().and_then(|s| s.to_str()) == Some("rmeta")
                     })
-                    .next()
                     .expect("failed to find rmeta")
             } else {
                 match dep_mtimes.iter().max_by_key(|kv| kv.1) {
diff --git a/src/cargo/core/compiler/job_queue.rs b/src/cargo/core/compiler/job_queue.rs
index 039d93d50d7..4b5ab5c9370 100644
--- a/src/cargo/core/compiler/job_queue.rs
+++ b/src/cargo/core/compiler/job_queue.rs
@@ -389,7 +389,7 @@ impl<'a, 'cfg> JobQueue<'a, 'cfg> {
             .jobserver
             .clone()
             .into_helper_thread(move |token| {
-                drop(messages.push(Message::Token(token)));
+                messages.push(Message::Token(token));
             })
             .chain_err(|| "failed to create helper thread for jobserver management")?;
 
@@ -405,7 +405,7 @@ impl<'a, 'cfg> JobQueue<'a, 'cfg> {
             .rustfix_diagnostic_server
             .borrow_mut()
             .take()
-            .map(move |srv| srv.start(move |msg| drop(messages.push(Message::FixDiagnostic(msg)))));
+            .map(move |srv| srv.start(move |msg| messages.push(Message::FixDiagnostic(msg))));
 
         crossbeam_utils::thread::scope(move |scope| state.drain_the_queue(cx, plan, scope, &helper))
             .expect("child threads shouldn't panic")
@@ -634,7 +634,7 @@ impl<'a, 'cfg> DrainState<'a, 'cfg> {
                 }
             }
         }
-        return events;
+        events
     }
 
     fn drain_the_queue(
diff --git a/src/cargo/util/toml/targets.rs b/src/cargo/util/toml/targets.rs
index 4eee8a192fd..f51c9fe1cb3 100644
--- a/src/cargo/util/toml/targets.rs
+++ b/src/cargo/util/toml/targets.rs
@@ -731,14 +731,12 @@ fn validate_target_name(
             if name.trim().is_empty() {
                 anyhow::bail!("{} target names cannot be empty", target_kind_human)
             }
-            if cfg!(windows) {
-                if restricted_names::is_windows_reserved(name) {
-                    warnings.push(format!(
-                        "{} target `{}` is a reserved Windows filename, \
+            if cfg!(windows) && restricted_names::is_windows_reserved(name) {
+                warnings.push(format!(
+                    "{} target `{}` is a reserved Windows filename, \
                         this target will not work on Windows platforms",
-                        target_kind_human, name
-                    ));
-                }
+                    target_kind_human, name
+                ));
             }
         }
         None => anyhow::bail!(