er" id="addError-param-stackTrace"><span class="type-annotation"><a href="dart-core/StackTrace-class.html">StackTrace</a></span> <span class="parameter-name">stackTrace</span></span> ])
      <div class="features">inherited</div>
    </section>
    <section class="desc markdown">
      <p>Passes the error to the target consumer as an error event.</p>
<p>This function must not be called when a stream is currently being added
using <a href="dart-io/Stdout/addStream.html">addStream</a>.</p>
<p>This operation i