Hi Cafe,<div><br></div><div>I have a program that I can reliably cause to hang. It&#39;s concurrent using STM, so I think it could be a deadlock or related issue. I also do some IO, so I think it could be blocking in a system call. It only hangs when compiled with <font class="Apple-style-span" face="&#39;courier new&#39;, monospace">-threaded</font>. I tried building with -prof, and running with -hc -xt to get a clue where in which function it is stopping, but the resulting profile didn&#39;t help much.</div>
<div><br></div><div>I&#39;ve started sprinkling print statements, but I thought I&#39;d trawl for better tips and techniques. Any suggestions on approaches?</div><div><br></div><div>Thanks,</div><div>Aran </div>