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<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<html xmlns="http://www.w3.org/1999/xhtml"><head><title>dead code</title><link rel="stylesheet" href="../../jargon.css" type="text/css"/><meta name="generator" content="DocBook XSL Stylesheets V1.61.0"/><link rel="home" href="../index.html" title="The Jargon File"/><link rel="up" href="../D.html" title="D"/><link rel="previous" href="dead-beef-attack.html" title="dead beef attack"/><link rel="next" href="dead-tree-version.html" title="dead-tree version"/></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">dead code</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="dead-beef-attack.html">Prev</a> </td><th width="60%" align="center">D</th><td width="20%" align="right"> <a accesskey="n" href="dead-tree-version.html">Next</a></td></tr></table><hr/></div><dt><a id="dead-code"/><dt xmlns="" id="dead-code"><b>dead code</b>: <span xmlns="http://www.w3.org/1999/xhtml" class="grammar">n.</span></dt></dt><dd><p> Routines that can never be accessed because all calls to them have
been removed, or code that cannot be reached because it is guarded by a
control structure that provably must always transfer control somewhere
else. The presence of dead code may reveal either logical errors due to
alterations in the program or significant changes in the assumptions and
environment of the program (see also <a href="../S/software-rot.html"><i class="glossterm">software rot</i></a>);
a good compiler should report dead code so a maintainer can think about
what it means. (Sometimes it simply means that an
<span class="emphasis"><em>extremely</em></span> defensive programmer has inserted
<a href="../C/can-t-happen.html"><i class="glossterm">can't happen</i></a> tests which really can't happen &#8212;
yet.) Syn. <a href="../G/grunge.html"><i class="glossterm">grunge</i></a>. See also
<a href="dead.html"><i class="glossterm">dead</i></a>, and
<a href="../story-of-mel.html" title="The Story of Mel">The Story of Mel'</a>.</p></dd><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="dead-beef-attack.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="../D.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="dead-tree-version.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">dead beef attack </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> dead-tree version</td></tr></table></div></body></html>