diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/breakpoint-03.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/breakpoint-03.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,16 @@
+// Setting a breakpoint in a script we are no longer debugging is an error.
+
+load(libdir + "asserts.js");
+
+var g = newGlobal();
+var dbg = Debugger();
+var gobj = dbg.addDebuggee(g);
+g.eval("function f() { return 2; }");
+
+var s;
+dbg.onDebuggerStatement = function (frame) { s = frame.eval("f").return.script; };
+g.eval("debugger;");
+s.setBreakpoint(0, {});  // ok
+
+dbg.removeDebuggee(gobj);
+assertThrowsInstanceOf(function () { s.setBreakpoint(0, {}); }, Error);