diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Frame-environment-03.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Frame-environment-03.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+// If !frame.live, frame.environment throws.
+
+load(libdir + "asserts.js");
+
+var g = newGlobal();
+var dbg = Debugger(g);
+var frame;
+g.h = function () { frame = dbg.getNewestFrame(); };
+g.eval("h();");
+assertEq(frame.live, false);
+assertThrowsInstanceOf(function () { frame.environment; }, Error);