ArgumentError: comparison of Symbol with String failed

[jsimpson]

Installed and ran against a Rails 5.1.4 app using Ruby 2.5.0p0. I get the following exception:

Traceback (most recent call last):
        12: from /Users/omitted/.rbenv/versions/2.5.0/gemsets/omitted/bin/consistency_fail:23:in `<main>'
        11: from /Users/omitted/.rbenv/versions/2.5.0/gemsets/omitted/bin/consistency_fail:23:in `load'
        10: from /Users/omitted/.rbenv/versions/2.5.0/gemsets/omitted/gems/consistency_fail-0.3.5/bin/consistency_fail:20:in `<top (required)>'
         9: from /Users/omitted/.rbenv/versions/2.5.0/gemsets/omitted/gems/consistency_fail-0.3.5/lib/consistency_fail.rb:18:in `run'
         8: from /Users/omitted/.rbenv/versions/2.5.0/gemsets/omitted/gems/consistency_fail-0.3.5/lib/consistency_fail.rb:38:in `problems'
         7: from /Users/omitted/.rbenv/versions/2.5.0/gemsets/omitted/gems/consistency_fail-0.3.5/lib/consistency_fail.rb:38:in `map'
         6: from /Users/omitted/.rbenv/versions/2.5.0/gemsets/omitted/gems/consistency_fail-0.3.5/lib/consistency_fail.rb:39:in `block in problems'
         5: from /Users/omitted/.rbenv/versions/2.5.0/gemsets/omitted/gems/consistency_fail-0.3.5/lib/consistency_fail/introspectors/validates_uniqueness_of.rb:28:in `missing_indexes'
         4: from /Users/omitted/.rbenv/versions/2.5.0/gemsets/omitted/gems/consistency_fail-0.3.5/lib/consistency_fail/introspectors/validates_uniqueness_of.rb:28:in `reject'
         3: from /Users/omitted/.rbenv/versions/2.5.0/gemsets/omitted/gems/consistency_fail-0.3.5/lib/consistency_fail/introspectors/validates_uniqueness_of.rb:29:in `block in missing_indexes'
         2: from /Users/omitted/.rbenv/versions/2.5.0/gemsets/omitted/gems/consistency_fail-0.3.5/lib/consistency_fail/introspectors/validates_uniqueness_of.rb:29:in `include?'
         1: from /Users/omitted/.rbenv/versions/2.5.0/gemsets/omitted/gems/consistency_fail-0.3.5/lib/consistency_fail/index.rb:13:in `=='
/Users/omitted/.rbenv/versions/2.5.0/gemsets/omitted/gems/consistency_fail-0.3.5/lib/consistency_fail/index.rb:13:in `sort': comparison of Symbol with String failed (ArgumentError)

Not too sure what to do from here.

[caseymct]

in consistency_fail/lib/consistency_fail/index.rb lines 11 - 14 change to

def ==(other)
  self.table_name == other.table_name &&
    self.columns.map(&:to_s).sort == other.columns.map(&:to_s).sort
end