ZeroDivisionError when FA contains no valid sequences

[SamStudio8]

nope.fa

>NO
>OP

nope.fa.idx

NO      0       4       -1      -1
OP      0       8       -1      -1

nope.py

from goldilocks.goldilocks import Goldilocks
from goldilocks.strategies import NucleotideCounterStrategy

data = {
    "seq": {
        "idx": "nope.fa.idx"
    }
}

g = Goldilocks(NucleotideCounterStrategy(["A"]), data, length=3, stride=1, is_faidx=True) 
g.query("mean", track="A", limit=5).export_meta(sep="\t")

File "/home/sam/Projects/Packages/goldilocks/goldilocks/goldilocks.py", line 525, in __apply_filter_func
    mean_percentile = (len(track_scores[track_scores <= 0]) / float(len(track_scores))) * 100
ZeroDivisionError: float division by zero