diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Frame-offset-01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Frame-offset-01.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+// frame.offset throws if !frame.live.
+
+load(libdir + "asserts.js");
+
+var g = newGlobal();
+var dbg = Debugger(g);
+var f;
+dbg.onDebuggerStatement = function (frame) { f = frame; };
+g.eval("debugger;");
+assertEq(f.live, false);
+assertThrowsInstanceOf(function () { f.offset; }, Error);