Undefined name 'lineno' in ./pasta/base/annotate.py

[cclauss]

flake8 testing of https://github.com/google/pasta on Python 3.7.1

$ flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics

./pasta/base/annotate.py:1143:48: F821 undefined name 'lineno'
          'more than the outer indentation.' % lineno)
                                               ^
1     F821 undefined name 'lineno'
1

[soupytwist]

Thank you for the bug report!