src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/codegen/AssignSymbols.java

*** 710,732 ****
          final FunctionNode definingFn = lc.getDefiningFunction(symbol);
          assert definingFn != null;
          return definingFn == function;
      }
  
-     private void checkConstAssignment(final IdentNode ident) {
-         // Check for reassignment of constant
-         final Symbol symbol = ident.getSymbol();
-         if (symbol.isConst()) {
-             throwParserException(ECMAErrors.getMessage("syntax.error.assign.constant", symbol.getName()), ident);
-         }
-     }
- 
      @Override
      public Node leaveBinaryNode(final BinaryNode binaryNode) {
-         if (binaryNode.isAssignment() && binaryNode.lhs() instanceof IdentNode) {
-             checkConstAssignment((IdentNode) binaryNode.lhs());
-         }
          switch (binaryNode.tokenType()) {
          case ASSIGN:
              return leaveASSIGN(binaryNode);
          default:
              return super.leaveBinaryNode(binaryNode);
--- 710,721 ----
*** 749,761 ****
          return binaryNode;
      }
  
      @Override
      public Node leaveUnaryNode(final UnaryNode unaryNode) {
-         if (unaryNode.isAssignment() && unaryNode.getExpression() instanceof IdentNode) {
-             checkConstAssignment((IdentNode) unaryNode.getExpression());
-         }
          switch (unaryNode.tokenType()) {
          case DELETE:
              return leaveDELETE(unaryNode);
          case TYPEOF:
              return leaveTYPEOF(unaryNode);
--- 738,747 ----