On Tue, Mar 12, 2013 at 8:06 AM, Ben Gamari <span dir="ltr">&lt;<a href="mailto:bgamari.foss@gmail.com" target="_blank">bgamari.foss@gmail.com</a>&gt;</span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

<div class="im">  2) We decide it is acceptable to break users code multiple times, drop</div>
     the Monoid instance and reintroduce the new instance after some<br>
     delay. The length of this delay could range from no delay at all<br>
     (allowing folks to quickly move to the new instance, although<br>
     potentially unwittingly) to several months (hoping that most users<br>
     will realize the change during this window).<br></blockquote><div><br></div><div>Before we even consider breaking user code we should see how much code will be broken. If someone with spare cycles could download a copy of Hackage and grep for uses of mappend on Data.Map that would be great.</div>

<div><br></div></div>