src/jdk/nashorn/internal/codegen/CodeGenerator.java

*** 339,349 ****
              }
  
              @Override
              public Node enter(final IndexNode indexNode) {
                  if (!baseAlreadyOnStack) {
!                     load(indexNode.getBase());
                      load(indexNode.getIndex());
                  }
                  method.dynamicGetIndex(node.getType(), getCallSiteFlags(), indexNode.isFunction());
                  return null;
              }
--- 339,349 ----
              }
  
              @Override
              public Node enter(final IndexNode indexNode) {
                  if (!baseAlreadyOnStack) {
!                     load(indexNode.getBase()).convert(Type.OBJECT);
                      load(indexNode.getIndex());
                  }
                  method.dynamicGetIndex(node.getType(), getCallSiteFlags(), indexNode.isFunction());
                  return null;
              }