diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Script-global-02.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Script-global-02.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,40 @@
+// Debugger.Script.prototype.script returns the global the script runs in.
+// Multi-global version.
+
+var dbg = new Debugger;
+
+var g1 = newGlobal();
+var g1w = dbg.addDebuggee(g1);
+
+var g2 = newGlobal();
+var g2w = dbg.addDebuggee(g2);
+
+var g3 = newGlobal();
+var g3w = dbg.addDebuggee(g3);
+
+var log = '';
+dbg.onDebuggerStatement = function (frame) {
+  log += 'd';
+  assertEq(frame.script.global, g1w);
+  assertEq(frame.older.script.global, g2w);
+  assertEq(frame.older.older.script.global, g3w);
+  assertEq(frame.older.older.older.script.global, g1w);
+}
+
+g1.eval('function f() { debugger; }');
+
+g2.g1 = g1;
+g2.eval('function g() { g1.f(); }');
+
+g3.g2 = g2;
+g3.eval('function h() { g2.g(); }');
+
+g1.g3 = g3;
+g1.eval('function i() { g3.h(); }');
+
+g1.i();
+assertEq(log, 'd');
+
+assertEq(g1w.getOwnPropertyDescriptor('f').value.global, g1w);
+assertEq(g2w.getOwnPropertyDescriptor('g').value.global, g2w);
+assertEq(g3w.getOwnPropertyDescriptor('h').value.global, g3w);