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-rw-r--r--src/libstd/rt/util.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstd/rt/util.rs b/src/libstd/rt/util.rs
index b53219db245..04f36d99c8e 100644
--- a/src/libstd/rt/util.rs
+++ b/src/libstd/rt/util.rs
@@ -63,7 +63,7 @@ pub const ENFORCE_SANITY: bool = true || !cfg!(rtopt) || cfg!(rtdebug) ||
                                   cfg!(rtassert);
 
 pub fn dumb_print(args: fmt::Arguments) {
-    let _ = Stderr::new().write_fmt(args);
+    let _ = Stderr::new().map(|mut stderr| stderr.write_fmt(args));
 }
 
 pub fn abort(args: fmt::Arguments) -> ! {