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-rw-r--r--src/lib/_int.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/lib/_int.rs b/src/lib/_int.rs
index dfd2204d007..1824d142dab 100644
--- a/src/lib/_int.rs
+++ b/src/lib/_int.rs
@@ -27,7 +27,7 @@ iter range(int lo, int hi) -> int {
 
 fn to_str(int n, uint radix) -> str
 {
-    check (0u < radix && radix <= 16u);
+    assert (0u < radix && radix <= 16u);
     if (n < 0) {
         ret "-" + _uint.to_str((-n) as uint, radix);
     } else {