diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Frame-eval-20.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Frame-eval-20.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,46 @@
+// Eval-in-frame with different type on non-youngest Ion frame.
+
+load(libdir + "jitopts.js");
+
+if (!jitTogglesMatch(Opts_Ion2NoParallelCompilation))
+  quit(0);
+
+withJitOptions(Opts_Ion2NoParallelCompilation, function () {
+  function test(shadow) {
+    var g = newGlobal();
+    var dbg = new Debugger;
+
+    // Note that we depend on CCW scripted functions being opaque to Ion
+    // optimization for this test.
+    g.h = function h(d) {
+      if (d) {
+        dbg.addDebuggee(g);
+        var f = dbg.getNewestFrame().older;
+        assertEq(f.implementation, "ion");
+        assertEq(f.environment.getVariable("foo"), 42);
+
+        // EIF of a different type too.
+        f.eval((shadow ? "var " : "") + "foo = 'string of 42'");
+        g.expected = shadow ? 42 : "string of 42";
+      }
+    }
+
+    g.eval("" + function f(d) {
+      var foo = 42;
+      g(d);
+      return foo;
+    });
+    g.eval("" + function g(d) {
+      h(d);
+    });
+
+    g.eval("(" + function () {
+      for (i = 0; i < 5; i++)
+        f(false);
+      assertEq(f(true), "string of 42");
+    } + ")();");
+  }
+
+  test(false);
+  test(true);
+});