diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testWeirdDateParse.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testWeirdDateParse.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,38 @@
+var global = this;
+function testWeirdDateParseOuter()
+{
+    var vDateParts = ["11", "17", "2008"];
+    var out = [];
+    for (var vI = 0; vI < vDateParts.length; vI++)
+        out.push(testWeirdDateParseInner(vDateParts[vI]));
+    /* Mutate the global shape so we fall off trace; this causes
+     * additional oddity */
+    global.x = Math.random();
+    return out;
+}
+function testWeirdDateParseInner(pVal)
+{
+    var vR = 0;
+    for (var vI = 0; vI < pVal.length; vI++) {
+        var vC = pVal.charAt(vI);
+        if ((vC >= '0') && (vC <= '9'))
+            vR = (vR * 10) + parseInt(vC);
+    }
+    return vR;
+}
+function testWeirdDateParse() {
+    var result = [];
+    result.push(testWeirdDateParseInner("11"));
+    result.push(testWeirdDateParseInner("17"));
+    result.push(testWeirdDateParseInner("2008"));
+    result.push(testWeirdDateParseInner("11"));
+    result.push(testWeirdDateParseInner("17"));
+    result.push(testWeirdDateParseInner("2008"));
+    result = result.concat(testWeirdDateParseOuter());
+    result = result.concat(testWeirdDateParseOuter());
+    result.push(testWeirdDateParseInner("11"));
+    result.push(testWeirdDateParseInner("17"));
+    result.push(testWeirdDateParseInner("2008"));
+    return result.join(",");
+}
+assertEq(testWeirdDateParse(), "11,17,2008,11,17,2008,11,17,2008,11,17,2008,11,17,2008");