<div dir="ltr">I created a ticket and attached the files:<br><br><a href="http://ghc.haskell.org/trac/ghc/ticket/8162">http://ghc.haskell.org/trac/ghc/ticket/8162</a><br><br>-- Akio<br><br><div class="gmail_extra"><br><br>
<div class="gmail_quote">On Fri, Aug 23, 2013 at 7:46 PM, Simon Peyton-Jones <span dir="ltr"><<a href="mailto:simonpj@microsoft.com" target="_blank">simonpj@microsoft.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Akio<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Thanks that’s amazing! I wonder if it’d be worth adding it, with commentary, (and attaching the files) as a Trac ticket? I know
its already fixed, but it’s great to be able to say “to see an example of why this is vital, see Trac #8324”, whereas email archives are more ephemeral somehow.<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Simon<u></u><u></u></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US"> Glasgow-haskell-users [mailto:<a href="mailto:glasgow-haskell-users-bounces@haskell.org" target="_blank">glasgow-haskell-users-bounces@haskell.org</a>]
<b>On Behalf Of </b>Akio Takano<br>
<b>Sent:</b> 23 August 2013 11:35<br>
<b>To:</b> <a href="mailto:glasgow-haskell-users@haskell.org" target="_blank">glasgow-haskell-users@haskell.org</a>; Richard Eisenberg<br>
<b>Subject:</b> Fwd: New restrictions to open type families<u></u><u></u></span></p>
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(I forgot to send to the list, trying again)<u></u><u></u></p>
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Thank you very much for your detailed explanation!<u></u><u></u></p>
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On Fri, Aug 23, 2013 at 1:24 PM, Richard Eisenberg <<a href="mailto:eir@cis.upenn.edu" target="_blank">eir@cis.upenn.edu</a>> wrote:<u></u><u></u></p>
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This is a good question. Happily, there are at least two decent answers.<u></u><u></u></p>
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1) We're not sure that this problem cannot cause a segfault… it's just that we've been unable to produce one when trying. Perhaps we haven't tried hard enough.<u></u><u></u></p>
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I successfully constructed such an example.<br>
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<a href="https://github.com/takano-akio/type-family-overlap" target="_blank">https://github.com/takano-akio/type-family-overlap</a><span style="color:#888888"><br>
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<span>- Akio</span></span><u></u><u></u></p>
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