../../../source/texk/web2c/luatexdir/tex/mlist.w: In function ‘mlist_to_hlist’: ../../../source/texk/web2c/luatexdir/tex/mlist.w:3212:5: warning: variable ‘s’ set but not used [-Wunused-but-set-variable] removing s and the assignments seems to make a lot of code superfluous... %-( Best Martin