diff --git a/src/libsyntax/diagnostic.rs b/src/libsyntax/diagnostic.rs
index fbf015169f858..e95813e44babe 100644
--- a/src/libsyntax/diagnostic.rs
+++ b/src/libsyntax/diagnostic.rs
@@ -208,6 +208,10 @@ impl Handler {
     }
     pub fn fatal(&self, msg: &str) -> ! {
         self.emit.borrow_mut().emit(None, msg, None, Fatal);
+
+        // Suppress the fatal error message from the panic below as we've
+        // already terminated in our own "legitimate" fashion.
+        io::set_panic(Box::new(io::sink()));
         panic!(FatalError);
     }
     pub fn err(&self, msg: &str) {
diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index 7333265bdd412..d93af5da13c1e 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -32,6 +32,7 @@
 #![feature(libc)]
 #![feature(ref_slice)]
 #![feature(rustc_private)]
+#![feature(set_stdio)]
 #![feature(staged_api)]
 #![feature(str_char)]
 #![feature(str_escape)]