Benchmarking script fails with unused matrices

[ArtPoon]

Encountered this when running through the integrase sequences in IN.txt for benchmark testing.
This exception arose with the sequence at index 26 (here I've hard-coded it for testing):

Traceback (most recent call last):
  File "benchmark.py", line 16, in <module>
    g2.align(ref, seqs[26])
  File "/usr/local/lib/python2.7/dist-packages/gotoh2-0.1-py2.7-linux-x86_64.egg/gotoh2/aligner.py", line 73, in align
    self.matrix
RuntimeError: Traceback failed, try local alignment

This usually means that the traceback failed (returning a NULL value as alignment score) but this routine doesn't print the usual debugging statement. I've added a couple of print statements and found that the cost and bits matrices haven't been modified from their initial values.

[ArtPoon]

It's an empty string 🤦‍♂️