diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_5/extensions/nested-delete-name-in-evalcode.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_5/extensions/nested-delete-name-in-evalcode.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,99 @@
+// |reftest| fails -- bug 604301, at a minimum
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 616294;
+var summary =
+  "|delete x| inside a function in eval code, where that eval code includes " +
+  "|var x| at top level, actually does delete the binding for x";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var f;
+
+function testOuterLet()
+{
+  return eval("let x; (function() { return delete x; })");
+}
+
+f = testOuterLet();
+
+assertEq(f(), true); // configurable, so remove => true
+assertEq(f(), true); // not there => true (only non-configurable => false)
+
+
+function testOuterForLet()
+{
+  return eval("for (let x; false; ); (function() { return delete x; })");
+}
+
+f = testOuterForLet();
+
+assertEq(f(), true); // not there => true (only non-configurable => false)
+
+
+function testOuterForInLet()
+{
+  return eval("for (let x in {}); (function() { return delete x; })");
+}
+
+f = testOuterForInLet();
+
+assertEq(f(), true); // configurable, so remove => true
+assertEq(f(), true); // not there => true (only non-configurable => false)
+
+
+function testOuterNestedVarInLetBlock()
+{
+  return eval("let (x = 7) { var x = 9; } (function() { return delete x; })");
+}
+
+f = testOuterNestedVarInLetBlock();
+
+assertEq(f(), true); // configurable var, so remove => true
+assertEq(f(), true); // let still there, configurable => true
+assertEq(f(), true); // nothing at all => true
+
+
+function testOuterNestedVarInForLet()
+{
+  return eval("for (let q = 0; q < 5; q++) { var x; } (function() { return delete x; })");
+}
+
+f = testOuterNestedVarInForLet();
+
+assertEq(f(), true); // configurable, so remove => true
+assertEq(f(), true); // there => true
+
+
+function testArgumentShadowLet()
+{
+  return eval("let x; (function(x) { return delete x; })");
+}
+
+f = testArgumentShadowLet();
+
+assertEq(f(), false); // non-configurable argument => false
+
+
+function testFunctionLocal()
+{
+  return eval("(function() { let x; return delete x; })");
+}
+
+f = testFunctionLocal();
+
+assertEq(f(), false); // defined by function code => not configurable => false
+
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("All tests passed!");