Hardware fault and hardware race condition- interrupts
<p>In the 382 line in the file interrupt.c ( <a href="http://www.cse.iitd.ernet.in/~sbansal/os/pintos/doc/pintos_html/interrupt_8c-source.html" rel="nofollow">http://www.cse.iitd.ernet.in/~sbansal/os/pintos/doc/pintos_html/interrupt_8c-source.html</a>) I saw the comment: </p>

<blockquote>
  <p>There is no handler, but this interrupt can trigger spuriously due to a hardware fault or hardware race condition.  Ignore it.</p>
</blockquote>

<p><code>hardware fault</code> and <code>hardware race condition</code>. What's going on?</p>