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<h2 class="entry-title">Fixing “Wrong type argument: characterp, return” in !Emacs</h2>
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<span class="meta-prep meta-prep-author">Posted on</span> <a href="http://lukeshu.ath.cx/1/wordpress/2011/08/fixing-wrong-type-argument-characterp-return-in-emacs/" title="17:27" rel="bookmark"><span class="entry-date">2011/08/15</span></a> <span class="meta-sep">by</span> <span class="author vcard"><a class="url fn n" href="http://lukeshu.ath.cx/1/wordpress/author/lts/" title="View all posts by lts">lts</a></span>
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<p>A few months ago, I ran into an issue with Emacs that I just found the solution to. In Emacs term-mode (or ansi-term, or multi-term), hitting Enter doesn’t work, and the mini-buffer displays <q><tt>Wrong type argument: characterp, return</tt></q>, and the term doesn’t see the keystroke.</p>
<p>I dented about it on identi.ca, and no one was able to help me. This turned out to be a mistake, because I kept seeing the dent as I Googled/DuckDuckGo’ed for a solution.</p>
<p>Anyway, I finally <a href="http://lukeshu.ath.cx/1/wordpress/2011/08/emacs-autopair-problems-when-using-term-mode/">found the solution</a> on the Korean blog <a href="http://seorenn.blogspot.com/">Seorenn SIGSEGV</a>.</p>
<p>The problem is basically that autopair had remapped the return key to an autopair function, which didn’t jive with term-mode. At least, that’s what Seorenn said.</p>
<p>If it were that simple, I would have noticed it when I installed autopair. Only in some environments does the problem manifest. For example, on Ubuntu, where I started using autopair, the problem never appears. When I switched to Fedora (and later Parabola), I figured it was some issue with the X server, because it worked fine when running in a terminal.</p>
<p>Now knowing that the problem was related to autopair, I can’t figure out how it ever worked.</p>
<p>Anyway, the fix is to add the following to your .emacs:</p>
<pre><code>(add-hook 'term-mode-hook
#'(lambda () (setq autopair-dont-activate t)))</code></pre>
<p>(Code segment from <a href="http://emacs-fu.blogspot.com/2010/06/console-apps-in-emacs-with-multi-term.html">emacs-fu</a>, via <a href="http://seorenn.blogspot.com/2011/05/emacs-autopair-term-mode.html">Seorenn SIGSEGV</a>.)</p>
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