length_internal 205 src/fns.c return length_internal (sequence, len) == -1? Qnil: Qt; length_internal 220 src/fns.c return length_internal (sequence, len + 1) == -1? Qt: Qnil; length_internal 238 src/fns.c return length_internal (sequence, len + 1) == 1? Qt: Qnil;