filler_scm       3291 src/extlib.c     ScmObj filler_scm;
filler_scm       3296 src/extlib.c     filler_scm = SCM_ARGREF(0);
filler_scm       3297 src/extlib.c     if (!SCM_PROCEDUREP(filler_scm)) Scm_Error("procedure required, but got %S", filler_scm);
filler_scm       3298 src/extlib.c     filler = SCM_PROCEDURE(filler_scm);