commit ec5b52e9c836d4fb41bc2e4762d8196ee9a8edb3
author David Tolnay <dtolnay@gmail.com> Sun Dec 17 22:42:32 2017 -0800
committer David Tolnay <dtolnay@gmail.com> Sun Dec 17 22:42:32 2017 -0800
tree 666238aea7c6d741c5cc4e44c307eff892bdffa4
parent e959425c39eba3de72fd1dc135c86cfce7ddf678

Avoid interleaving errorf in tests

tests/common/mod.rs

diff --git a/tests/common/mod.rs b/tests/common/mod.rs
index ecf4f88..0f83f1c 100644
--- a/tests/common/mod.rs
+++ b/tests/common/mod.rs
@@ -13,7 +13,8 @@
     ($($tt:tt)*) => {
         {
             use ::std::io::Write;
-            write!(::std::io::stderr(), $($tt)*).unwrap();
+            let stderr = ::std::io::stderr();
+            write!(stderr.lock(), $($tt)*).unwrap();
         }
     };
 }