devdocs/elisp/error-messages.html


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 <h4 class="subsection">Error Messages</h4>  <p>Some examples signal errors. This normally displays an error message in the echo area. We show the error message on a line starting with ‘<samp>error→</samp>’. Note that ‘<samp>error→</samp>’ itself does not appear in the echo area. </p> <div class="example"> <pre class="example">(+ 23 'x)
error→ Wrong type argument: number-or-marker-p, x
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    Copyright &copy; 1990-1996, 1998-2022 Free Software Foundation, Inc. <br>Licensed under the GNU GPL license.<br>
    <a href="https://www.gnu.org/software/emacs/manual/html_node/elisp/Error-Messages.html" class="_attribution-link">https://www.gnu.org/software/emacs/manual/html_node/elisp/Error-Messages.html</a>
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