diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug775801.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug775801.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+function f() {
+    var x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16,x17,x18,x19,x20;
+    var b = {a:'ponies'};
+    eval('');
+    return function(e) { return b[e] }
+}
+
+assertEq("aaa".replace(/a/g, f()), "poniesponiesponies");