Jan Vroonhof <vroonhof(a)math.ethz.ch&gt; writes: I if you load disass.el and the M-x debug-on-entry RET you see it crashing while trying to print the return value of (symbol-function 'x-win-init-sun) It crashed here void print_symbol (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag) { /* This function can GC */ /* #### Bug!! (intern "") isn't printed in some distinguished way */ /* #### (the reader also loses on it) */ struct Lisp_String *name = symbol_name (XSYMBOL (obj)); Bytecount size = string_length (name); name = 0xDEADBEEF :-( Jan