Re: pserialize(9) vs. TAILQ

[Taylor R Campbell <campbell+netbsd-tech-kern%mumble.net@localhost>]

   Date: Wed, 19 Nov 2014 00:05:05 +0800
   From: Dennis Ferguson <dennis.c.ferguson%gmail.com@localhost>

   Also, the TAILQ macros depend on a type pun fairly similar to the one
   that did in the CIRCLEQ macros and hence have a lifetime which extends
   only to some future version of the compiler smart enough to recognize
   that and miscompile them.

What type pun is that?  I don't see it.