Normal If you write
$rsearch(text,)
in the file naming script and then move the cursor between the comma and the closing parenthesis and start writing a regular expression like
[a-z]
then picard crashes as soon as the '[' character is entered, since it tries to parse the regular expression and the re module raises the following exception
Traceback (most recent call last): File "/usr/lib64/python3.6/site-packages/picard/ui/options/renaming.py", line 130, in check_formats self.update_examples() File "/usr/lib64/python3.6/site-packages/picard/ui/options/renaming.py", line 160, in update_examples example1 = self._example_to_filename(self.example_1()) File "/usr/lib64/python3.6/site-packages/picard/ui/options/renaming.py", line 148, in _example_to_filename filename = file._make_filename(file.filename, file.metadata, settings) File "/usr/lib64/python3.6/site-packages/picard/file.py", line 349, in _make_filename new_filename = self._script_to_filename(naming_format, metadata, settings) File "/usr/lib64/python3.6/site-packages/picard/file.py", line 309, in _script_to_filename filename = ScriptParser().eval(naming_format, metadata, self) File "/usr/lib64/python3.6/site-packages/picard/script.py", line 285, in eval return ScriptParser._cache[key].eval(self) File "/usr/lib64/python3.6/site-packages/picard/script.py", line 123, in eval result.append(item.eval(state)) File "/usr/lib64/python3.6/site-packages/picard/script.py", line 115, in eval return function(parser, *args) File "/usr/lib64/python3.6/site-packages/picard/script.py", line 447, in func_rsearch match = re.search(pattern, text) File "/usr/lib64/python3.6/re.py", line 182, in search return _compile(pattern, flags).search(string) File "/usr/lib64/python3.6/re.py", line 301, in _compile p = sre_compile.compile(pattern, flags) File "/usr/lib64/python3.6/sre_compile.py", line 562, in compile p = sre_parse.parse(p, flags) File "/usr/lib64/python3.6/sre_parse.py", line 855, in parse p = _parse_sub(source, pattern, flags & SRE_FLAG_VERBOSE, 0) File "/usr/lib64/python3.6/sre_parse.py", line 416, in _parse_sub not nested and not items)) File "/usr/lib64/python3.6/sre_parse.py", line 523, in _parse source.tell() - here) sre_constants.error: unterminated character set at position 0 Aborted (core dumped)
This can be reproduced every time with those steps (but it doesn't happen if the closing parenthesis is not there).
This is fixed by https://github.com/metabrainz/picard/pull/999