e last <var>form</var>.
</p>
<p><span class="fndoclabel">Errors</span> <br />A <a href="ref-glossary.html#gl:thread">thread</a> attempts to release a <a href="ref-glossary.html#gl:lock">lock</a> that it does not
hold.
</p>
<p><span class="fndoclabel">See also</span>
<br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="ref-make-condition-variable.html"><b>make-condition-variable</b></a>
<br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="ref-make-lock.html"><b>make-lock</b></a>
<br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="ref-make-recursive-lock.