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Fix of list index out of range error in PoFileParser.add_message when translations is empty #1135

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Oct 19, 2024
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3 changes: 3 additions & 0 deletions babel/messages/pofile.py
Original file line number Diff line number Diff line change
Expand Up @@ -247,6 +247,9 @@ def _add_message(self) -> None:

def _finish_current_message(self) -> None:
if self.messages:
if not self.translations:
self._invalid_pofile("", self.offset, f"missing msgstr for msgid '{self.messages[0].denormalize()}'")
self.translations.append([0, _NormalizedString("")])
self._add_message()

def _process_message_line(self, lineno, line, obsolete=False) -> None:
Expand Down
17 changes: 17 additions & 0 deletions tests/messages/test_pofile.py
Original file line number Diff line number Diff line change
Expand Up @@ -1014,3 +1014,20 @@ def test_issue_1087():
"Language: \n"
''')
assert pofile.read_po(buf).locale is None


@pytest.mark.parametrize("case", ['msgid "foo"', 'msgid "foo"\nmsgid_plural "foos"'])
@pytest.mark.parametrize("abort_invalid", [False, True])
def test_issue_1134(case: str, abort_invalid: bool):
buf = StringIO(case)

if abort_invalid:
# Catalog not created, aborted with PoFileError
with pytest.raises(pofile.PoFileError) as excinfo:
pofile.read_po(buf, abort_invalid=True)
assert str(excinfo.value) == "missing msgstr for msgid 'foo' on 0"
else:
# Catalog is created with warning, no abort
output = pofile.read_po(buf)
assert len(output) == 1
assert output["foo"].string in ((''), ('', ''))
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