Version-Release number of selected component:
pyrenamer-0.6.0-13.fc21

Additional info:
reporter:       libreport-2.5.1
cmdline:        python /usr/bin/pyrenamer
dso_list:       python-libs-2.7.9-6.fc22.x86_64
executable:     /usr/bin/pyrenamer
kernel:         4.0.4-301.fc22.x86_64
runlevel:       N 5
type:           Python
uid:            1000

Truncated backtrace:
re.py:251:_compile:error: nothing to repeat

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/pyrenamer/pyrenamer.py", line 754, in on_original_pattern_changed
    self.on_preview_button_clicked(None)
  File "/usr/lib/python2.7/site-packages/pyrenamer/pyrenamer.py", line 683, in on_preview_button_clicked
    self.file_selected_model.foreach(self.preview_rename_rows, paths)
  File "/usr/lib/python2.7/site-packages/pyrenamer/pyrenamer.py", line 482, in preview_rename_rows
    newname, newpath = renamerfilefuncs.rename_using_patterns(newname, newpath, pattern_ini, pattern_end, self.count)
  File "/usr/lib/python2.7/site-packages/pyrenamer/pyrenamer_filefuncs.py", line 318, in rename_using_patterns
    repattern = re.compile(pattern)
  File "/usr/lib64/python2.7/re.py", line 194, in compile
    return _compile(pattern, flags)
  File "/usr/lib64/python2.7/re.py", line 251, in _compile
    raise error, v # invalid expression
error: nothing to repeat

Local variables in innermost frame:
cachekey: (<type 'str'>, '*- YouTube \\[720\\]\\.mp4', 0)
pattern: '*- YouTube \\[720\\]\\.mp4'
bypass_cache: 0
flags: 0
key: ('*- YouTube \\[720\\]\\.mp4', 0)
v: error('nothing to repeat',)