gruut: Two test failures in french phonemizer sqlite3 connection

Not entirely sure what db_path it’s trying to access here, and these are the only two tests failing for me.

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ERROR: test_last_token (tests.test_fr_phonemizer.FrenchPhonemizerTestCase)
Ensure liason does not leave last token
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Traceback (most recent call last):
  File "/build/source/tests/test_fr_phonemizer.py", line 75, in test_last_token
    phonemes = text_to_phonemes("Est-ce-que", lang="fr")
  File "/build/source/gruut/__init__.py", line 224, in text_to_phonemes
    return_tuples.extend(
  File "/build/source/gruut/__init__.py", line 224, in <genexpr>
    return_tuples.extend(
  File "/build/source/gruut/lang.py", line 858, in phonemize
    for (token1, token1_pron), (token2, token2_pron) in pairwise(
  File "/build/source/gruut/utils.py", line 125, in pairwise
    next(b, None)
  File "/build/source/gruut/phonemize.py", line 271, in phonemize
    token_pron = self.get_pronunciation(token)
  File "/build/source/gruut/phonemize.py", line 328, in get_pronunciation
    word_prons = list(pron for _word, pron in self.select_prons(word))
  File "/build/source/gruut/phonemize.py", line 328, in <genexpr>
    word_prons = list(pron for _word, pron in self.select_prons(word))
  File "/build/source/gruut/phonemize.py", line 607, in select_prons
    self._connect()
  File "/build/source/gruut/phonemize.py", line 481, in _connect
    self.db_conn = sqlite3.connect(self.db_path)
sqlite3.OperationalError: unable to open database file

======================================================================
ERROR: test_liason (tests.test_fr_phonemizer.FrenchPhonemizerTestCase)
Test addition of liason
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Traceback (most recent call last):
  File "/build/source/tests/test_fr_phonemizer.py", line 51, in test_liason
    sentence = self._without_and_with_liason(
  File "/build/source/tests/test_fr_phonemizer.py", line 93, in _without_and_with_liason
    phonemes_no_liason = list(phonemizer_no_liason.phonemize(sentence.tokens))
  File "/build/source/gruut/lang.py", line 849, in phonemize
    yield from token_phonemes
  File "/build/source/gruut/phonemize.py", line 271, in phonemize
    token_pron = self.get_pronunciation(token)
  File "/build/source/gruut/phonemize.py", line 328, in get_pronunciation
    word_prons = list(pron for _word, pron in self.select_prons(word))
  File "/build/source/gruut/phonemize.py", line 328, in <genexpr>
    word_prons = list(pron for _word, pron in self.select_prons(word))
  File "/build/source/gruut/phonemize.py", line 607, in select_prons
    self._connect()
  File "/build/source/gruut/phonemize.py", line 481, in _connect
    self.db_conn = sqlite3.connect(self.db_path)
sqlite3.OperationalError: unable to open database file

----------------------------------------------------------------------

I tried to debug this by printing out the db_path and it is only opening :memory: and gruut/data/en-us/lexicon.db.

diff --git a/gruut/phonemize.py b/gruut/phonemize.py
index 4650fd3..934af86 100644
--- a/gruut/phonemize.py
+++ b/gruut/phonemize.py
@@ -477,8 +477,13 @@ class SqlitePhonemizer(Phonemizer):
         if self.db_conn is None:
             assert self.db_path is not None, "No sqlite3 database path"
 
-            _LOGGER.debug("Connecting to %s", self.db_path)
+            _LOGGER.error("Connecting to %s", self.db_path)
             self.db_conn = sqlite3.connect(self.db_path)
+            _LOGGER.error("OK")
+
+            import sys
+            sys.stdout.flush()
+            sys.stderr.flush()
 
             if not self.feature_to_id:
                 # Try to load feature names from the database