1 files changed, 11 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/bug848733.js b/js/src/jit-test/tests/ion/bug848733.js
new file mode 100644
index 0000000000..68d0cde460
--- /dev/null
+++ b/js/src/jit-test/tests/ion/bug848733.js
@@ -0,0 +1,11 @@
+var a = [1];
+function f(x) {
+    var round = Math.round;
+    for (var i=0; i<20; i++) {
+	a[0] = round(a[0]);
+	if (x > 500)
+	    a[0] = "a";
+    }
+}
+for (var i=0; i<550; i++)
+    f(i);