Xemacs 21.5 (beta28) "fuki" [Lucid] (i386-redhat-linux, Mule) SBCL: 1.0.29 / Linux x86 SLIME: cvs checkout 2009-06-12 Pity I couldn't copy the whole message, but Xemacs froze up and eventually croaked: "Out of memory: Memory exhausted." Nasty way to go. Gist of it, transcribed from its from cold dead window: slime-bug("Caught error during fontification while searching for forms that are suppressed by reader-conditionals. The error was: (cl-assertion-failed (<= (point) limit)) I believe the pt mentioned referred to this function: (defmethod collect-unames ((this yucky-guts)) #+my-hids-support (loop for s in (targets this) collecting (uname s)) #-my-hids-support nil )