diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Script-global-01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Script-global-01.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+// Debugger.Script.prototype.script returns the global the script runs in.
+
+var g = newGlobal();
+var dbg = new Debugger;
+var gw = dbg.addDebuggee(g);
+
+var log = '';
+dbg.onDebuggerStatement = function (frame) {
+  log += 'd';
+  assertEq(frame.script.global, gw);
+}
+
+g.eval('debugger;');
+assertEq(log, 'd');
+
+g.eval('function f() { debugger; }');
+g.f();
+assertEq(log, 'dd');
+
+assertEq(gw.getOwnPropertyDescriptor('f').value.global, gw);