1 files changed, 5 insertions, 0 deletions
diff --git a/compiler/rustc_interface/src/util.rs b/compiler/rustc_interface/src/util.rs
index 7658ffb0e3d..46a6c5861d5 100644
--- a/compiler/rustc_interface/src/util.rs
+++ b/compiler/rustc_interface/src/util.rs
@@ -115,6 +115,11 @@ impl Write for Sink {
         Ok(())
     }
 }
+impl io::LocalOutput for Sink {
+    fn clone_box(&self) -> Box<dyn io::LocalOutput> {
+        Box::new(Self(self.0.clone()))
+    }
+}
 
 /// Like a `thread::Builder::spawn` followed by a `join()`, but avoids the need
 /// for `'static` bounds.