Hi, Guile trunk as of today seems does not build (I ran make distclean after updating to latest version, this might explain if you do not get the same error). This is what it chokes on, after the error message it goes to an infinite loop: cat alist.doc arbiters.doc async.doc backtrace.doc boolean.doc bytevectors.doc chars.doc continuations.doc debug.doc deprecation.doc deprecated.doc discouraged.doc dynl.doc dynwind.doc eq.doc error.doc eval.doc evalext.doc extensions.doc feature.doc fluids.doc fports.doc futures.doc gc.doc goops.doc gsubr.doc gc-mark.doc gc-segment.doc gc-malloc.doc gc-card.doc gettext.doc gc-segment-table.doc guardians.doc hash.doc hashtab.doc hooks.doc i18n.doc init.doc ioext.doc keywords.doc lang.doc list.doc load.doc macros.doc mallocs.doc modules.doc numbers.doc objects.doc objprop.doc options.doc pairs.doc ports.doc print.doc procprop.doc procs.doc properties.doc r6rs-ports.doc random.doc rdelim.doc read.doc root.doc rw.doc scmsigs.doc script.doc simpos.doc smob.doc sort.doc srcprop.doc stackchk.doc stacks.doc stime.doc strings.doc srfi-4.doc srfi-13.doc srfi-14.doc strorder.doc strports.doc struct.doc symbols.doc threads.doc throw.doc values.doc variable.doc vectors.doc version.doc vports.doc weaks.doc ramap.doc unif.doc dynl.doc filesys.doc posix.doc net_db.doc socket.doc regex-posix.doc | GUILE_AUTO_COMPILE=0 ../meta/uninstalled-env guile-tools snarf-check-and-output-texi > guile-procedures.texi ERROR: In procedure struct-vtable: ERROR: Wrong type argument in position 1 (expecting struct): #f ^C If I use my installed version of guile (pulled from repository a few days ago) to run snarf-check-and-output-texi instead of the one I was just building this however works properly. Best Regards, Juhani Viheräkosi