<div dir="ltr">It's 7.8.2.<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Sun, Apr 13, 2014 at 10:55 AM, Chris Wong <span dir="ltr"><<a href="mailto:lambda.fairy@gmail.com" target="_blank">lambda.fairy@gmail.com</a>></span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="HOEnZb"><div class="h5">On Sun, Apr 13, 2014 at 8:45 PM, Konstantine Rybnikov <<a href="mailto:k-bx@k-bx.com">k-bx@k-bx.com</a>> wrote:<br>


> Hi!<br>
><br>
> I wanted to check out great new OverloadedLists [0] feature, but got an<br>
> error as in [1].<br>
><br>
> What am I doing wrong?<br>
><br>
> Thanks.<br>
><br>
> [0]:<br>
> <a href="https://www.haskell.org/ghc/docs/7.8.1/html/users_guide/type-class-extensions.html#overloaded-lists" target="_blank">https://www.haskell.org/ghc/docs/7.8.1/html/users_guide/type-class-extensions.html#overloaded-lists</a><br>


> [1]: <a href="https://gist.github.com/k-bx/10574806" target="_blank">https://gist.github.com/k-bx/10574806</a><br>
<br>
</div></div>Try upgrading to GHC 7.8.2 first. I heard it fixes a serious bug in<br>
the type checker, which may be behind your problem.<br>
<br>
><br>
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</blockquote></div><br></div>