Return to readline version 6.x in Homebrew to fix Postgresql? : <p>I'm no Homebrew expert but I think it has "upgraded" me from readline version 6.x to 7.0 sometime after <a href="http://ftp.gnu.org/gnu/readline/">9/15/16</a>:</p>

<pre><code>eat@eric-macbook:Homebrew$ brew info readline
readline: stable 7.0 (bottled) [keg-only]
Library for command-line editing
https://tiswww.case.edu/php/chet/readline/rltop.html
/usr/local/Cellar/readline/7.0 (45 files, 2M)
</code></pre>

<p>This has caused headaches for my 9.4.5 Homebrew version of Postgresql (I need the older 9.4 for comparability reasons):</p>

<pre><code>eat@eric-macbook:~$ psql --version
dyld: Library not loaded: /usr/local/opt/readline/lib/libreadline.6.dylib
  Referenced from: /usr/local/Cellar/postgresql/9.4.5/bin/psql
  Reason: image not found
Trace/BPT trap: 5
</code></pre>

<p>Unfortunately I can't find a 6.x version of readline on Homebrew to revert to - only 7.0 seems to be available(?).</p>

<p>My question is twofold:</p>

<ul>
<li>Is the the readline version mismatch the cause of my postgres/psql problem?</li>
<li>If so, how do I return to 6.x with Homebrew to correct the problem?</li>
</ul>

<p>Thank you in advance!</p>
