text: 'use strict';
  
  require('../common');
  const stream = require('stream');
  const assert = require('assert');
  
  const readable = new stream.Readable({
    read: () => {}
  });
  
  const errMessage = /Invalid non-string\/buffer chunk/;
  assert.throws(() => readable.push([]), errMessage);
  assert.throws(() => readable.push({}), errMessage);
  assert.throws(() => readable.push(0), errMessage);
  