diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testArrayComp1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testArrayComp1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,6 @@
+load(libdir + 'range.js');
+
+function testArrayComp1() {
+    return [a for (a in range(0, 10))].join('');
+}
+assertEq(testArrayComp1(), '0123456789');