diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/breakpoint-05.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/breakpoint-05.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+// If the offset parameter to setBreakpoint is invalid, throw an error.
+
+load(libdir + "asserts.js");
+
+var g = newGlobal();
+var dbg = new Debugger(g);
+var hits = 0;
+dbg.onDebuggerStatement = function (frame) {
+    // We assume at least one offset between 0 and frame.offset is invalid.
+    assertThrowsInstanceOf(
+        function () {
+            for (var i = 0; i < frame.offset; i++)
+                frame.script.setBreakpoint(i, {});
+        },
+        Error);
+    hits++;
+};
+g.eval("x = 256; debugger;");
+assertEq(hits, 1);