On Dec 17, 2011, at 2:57 PM, Gregory Crosswhite wrote:
+1 for this idea, because it follows the principle of least surprise.
Sorry about the double-post! I was foolish enough not only to use unsafePerformIO to send my e-mail, but to forgot to mark the sending routine with NOINLINE pragma. As a result, the sending action was sparked and run twice by the runtime environment.