diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Frame-this-02.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Frame-this-02.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+// Frame.prototype.this in strict direct eval frames
+
+var g = newGlobal();
+var dbg = new Debugger(g);
+var hits = 0;
+dbg.onDebuggerStatement = function (frame) {
+    hits++;
+    assertEq(frame.this, g.v);
+};
+
+g.eval("function f() { 'use strict'; eval('debugger;'); }");
+
+g.eval("Boolean.prototype.f = f; v = true; v.f();");
+g.eval("f.call(v);");
+g.eval("v = null; f.call(v);");
+
+assertEq(hits, 3);