1 files changed, 1 insertions, 1 deletions
diff --git a/src/term.rs b/src/term.rs
index 564eca7..70d5e1c 100644
--- a/src/term.rs
+++ b/src/term.rs
@@ -197,7 +197,7 @@ impl Reader {
     }
 
     fn next_key (&mut self) -> Keypress {
-        fail_unless!(str::len(self.buf) > 0);
+        assert!(str::len(self.buf) > 0);
         for uint::range_rev(str::len(self.buf), 0) |i| {
             match self.escapes.find(str::slice(self.buf, 0, i)) {
                 &Some(k) => {