title: Error at offset 2 of 16 bytes in bootstrap.inc on line 936
body: <p>I am working to solve this error but unable to find the reason as I am new for drupal <code>Error at offset 2 of 16 bytes in bootstrap.inc on line 936</code>
  when I open /var/www/html/mysite/includes/bootstrap.inc I have found this </p>
  
  <pre><code>function function variable_initialize($conf = array()) {
    // NOTE: caching the variables improves performance by 20% when serving
    // cached pages.
    if ($cached = cache_get('variables', 'cache_bootstrap')) {
      $variables = $cached-&gt;data;
    }
    else {
      // Cache miss. Avoid a stampede.
      $name = 'variable_init';
      if (!lock_acquire($name, 1)) {
        // Another request is building the variable cache.
        // Wait, then re-run this function.
        lock_wait($name);
        return variable_initialize($conf);
      }
      else {
        // Proceed with variable rebuild.
        $variables = array_map('unserialize', db_query('SELECT name, value FROM {variable}')-&gt;fetchAllKeyed());
        cache_set('variables', $variables, 'cache_bootstrap');
        lock_release($name);
      }
    }
  
    foreach ($conf as $name =&gt; $value) {
      $variables[$name] = $value;
    }
  
    return $variables;
  }
  </code></pre>
  
  <p>error is showing on this line  <code>$variables = array_map('unserialize', db_query('SELECT name, value FROM {variable}')-&gt;fetchAllKeyed());</code>
  I am unable to to solve it, what is the reason ?</p>