1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstd/io/stdio.rs b/src/libstd/io/stdio.rs
index f571bed3ba2..d7bc572106e 100644
--- a/src/libstd/io/stdio.rs
+++ b/src/libstd/io/stdio.rs
@@ -349,7 +349,7 @@ fn with_task_stdout<F>(f: F) where F: FnOnce(&mut Writer) -> IoResult<()> {
     });
     match result {
         Ok(()) => {}
-        Err(e) => panic!("failed printing to stdout: {}", e),
+        Err(e) => panic!("failed printing to stdout: {:?}", e),
     }
 }