diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug732864.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug732864.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,22 @@
+function BigInteger() { }
+function bnpCopyTo(g) {
+    var this_array = g.array;
+    for (var i = g.t; i >= 0; --i)
+        ;
+    g.t = g.t;
+}
+function bnpFromString(n) {
+    n.t = 0;
+    var i = 100;
+    while (--i >= 0) {
+        n.t++;
+    }
+}
+n = new BigInteger();
+n.array = new Array();
+bnpFromString(n);
+
+g = new BigInteger();
+g.array = new Array();
+g.t = 100;
+bnpCopyTo(g);