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-rw-r--r--src/libfuzzer/cycles.rs4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/libfuzzer/cycles.rs b/src/libfuzzer/cycles.rs
index fb4c6400434..7ea74b36940 100644
--- a/src/libfuzzer/cycles.rs
+++ b/src/libfuzzer/cycles.rs
@@ -14,12 +14,12 @@ use uint::range;
 
 // random uint less than n
 fn under(r : rand::rng, n : uint) -> uint {
-    assert n != 0u; r.next() as uint % n
+    fail_unless!(n != 0u); r.next() as uint % n
 }
 
 // random choice from a vec
 fn choice<T:copy>(r : rand::rng, v : ~[const T]) -> T {
-    assert vec::len(v) != 0u; v[under(r, vec::len(v))]
+    fail_unless!(vec::len(v) != 0u); v[under(r, vec::len(v))]
 }
 
 // k in n chance of being true