diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/bug625377.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/bug625377.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,13 @@
+x = []
+for(var i=0; i<3; i++) {
+    var obj = { first: "first", second: "second" };
+    var count = 0;
+    for (var elem in obj) {
+        delete obj.second;
+        count++;
+    }
+    x.push(count);
+}
+assertEq(x[0], 1);
+assertEq(x[1], 1);
+assertEq(x[2], 1);