<div style="font-family:arial,sans-serif;font-size:13px">I&#39;m facing this problem only when I compiled the code using -O2 Flag.</div><div style="font-family:arial,sans-serif;font-size:13px">I tried the following,</div><div style="font-family:arial,sans-serif;font-size:13px">
* Compiled with -O1 Flag (7.4.1), It compiled fine</div><div style="font-family:arial,sans-serif;font-size:13px">* Compiled with ghc-7.0.4 with -O2, it&#39;s getting compiled successfully but with the Warning,</div><div style="font-family:arial,sans-serif;font-size:13px">
<div>SpecConstr</div><div>    Function `$wa{v s27vx} [lid]&#39;</div><div>      has one call pattern, but the limit is ...</div></div><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">
[Module that is getting stuck is using heavy quasiquotation]</div><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">Env:</div><div style="font-family:arial,sans-serif;font-size:13px">
OS: Ubuntu 12.04 [x86_64]</div><div style="font-family:arial,sans-serif;font-size:13px">GHC: 7.4.1</div><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">
Is this a bug?</div><div style="font-family:arial,sans-serif;font-size:13px">Anything else should I need to try?</div>