1 files changed, 7 insertions, 7 deletions
diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
index 3dec0d9299c..6c5f3e62454 100644
--- a/compiler/rustc_errors/src/lib.rs
+++ b/compiler/rustc_errors/src/lib.rs
@@ -628,7 +628,7 @@ impl Handler {
         message: DiagnosticMessage,
         args: impl Iterator<Item = DiagnosticArg<'a, 'static>>,
     ) -> SubdiagnosticMessage {
-        SubdiagnosticMessage::Eager(self.eagerly_translate_to_string(message, args))
+        SubdiagnosticMessage::Eager(Cow::from(self.eagerly_translate_to_string(message, args)))
     }
 
     /// Translate `message` eagerly with `args` to `String`.
@@ -1450,14 +1450,14 @@ impl HandlerInner {
         self.emit_stashed_diagnostics();
 
         let warnings = match self.deduplicated_warn_count {
-            0 => String::new(),
-            1 => "1 warning emitted".to_string(),
-            count => format!("{count} warnings emitted"),
+            0 => Cow::from(""),
+            1 => Cow::from("1 warning emitted"),
+            count => Cow::from(format!("{count} warnings emitted")),
         };
         let errors = match self.deduplicated_err_count {
-            0 => String::new(),
-            1 => "aborting due to previous error".to_string(),
-            count => format!("aborting due to {count} previous errors"),
+            0 => Cow::from(""),
+            1 => Cow::from("aborting due to previous error"),
+            count => Cow::from(format!("aborting due to {count} previous errors")),
         };
         if self.treat_err_as_bug() {
             return;