Ship ES2015 sloppy-mode const semantics

test/mjsunit/regress/regress-1178598.js

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+// Flags: --legacy-const
+
 // Regression test cases for issue 1178598.
 
 // Make sure const-initialization doesn't conflict
 // with heap-allocated locals for catch variables.
 var value = (function(){
   try { } catch(e) {
     // Force the 'e' variable to be heap-allocated
     // by capturing it in a function closure.
     (function() { e; });
   }
@@ skipping 41 matching lines @@
   try {
     eval("e");
     assertTrue(false);  // should throw exception
   } catch(exception) {
     assertTrue(exception instanceof ReferenceError);
     return result;
   }
 })();
 
 assertEquals(87, value);