bset_zv_marker    623 src/buffer.c     bset_zv_marker (b, Qnil);
bset_zv_marker    872 src/buffer.c         bset_zv_marker (b->base_buffer,
bset_zv_marker    884 src/buffer.c         bset_zv_marker (b, build_marker (b, b->zv, b->zv_byte));
bset_zv_marker   4661 src/buffer.c     bset_zv_marker (&buffer_local_flags, make_fixnum (0));