diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/gc/incremental-01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/gc/incremental-01.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+var objs;
+
+function init()
+{
+    objs = new Object();
+    var x = new Object();
+    objs.root1 = x;
+    objs.root2 = new Object();
+    x.ptr = new Object();
+    x = null;
+
+    /*
+     * Clears out the arena lists. Otherwise all the objects above
+     * would be considered to be created during the incremental GC.
+     */
+    gc();
+}
+
+/*
+ * Use eval here so that the interpreter frames end up higher on the
+ * stack, which avoids them being seen later on by the conservative
+ * scanner.
+ */
+eval("init()");
+
+gcslice(0);
+selectforgc(objs.root2);
+gcslice(1);
+objs.root2.ptr = objs.root1.ptr;
+objs.root1.ptr = null;
+gcslice();