"ValueError: incomplete format key" occurs repeatedly

[anonymous]

"Value Error" occurs when I set "%(" in configuration value of Administration. (e.g. Administration - General - Basic Settings - Description) And Once "Value Error" occured, same error occurs on most of pages until I restart Trac process.

System Information

Trac	1.0
Python	2.7.3 (default, Apr 10 2012, 23:31:26) [MSC v.1500 32 bit (Intel)]
Babel	0.9.6
Docutils	0.7
Genshi	0.6
mod_wsgi	3.4
Pygments	1.4
pysqlite	2.6.0
setuptools	0.6c11
SQLite	3.6.21
Subversion	1.7.7
jQuery	1.7.2

OS: Windows Server 2003 x86 SP2

Python Traceback

Traceback (most recent call last):
  File "C:\python\lib\site-packages\trac-1.0-py2.7.egg\trac\web\api.py", line 504, in send_error
    data, 'text/html')
  File "C:\python\lib\site-packages\trac-1.0-py2.7.egg\trac\web\chrome.py", line 961, in render_template
    data = self.populate_data(req, data)
  File "C:\python\lib\site-packages\trac-1.0-py2.7.egg\trac\web\chrome.py", line 817, in populate_data
    'descr': self.env.project_description,
  File "C:\python\lib\site-packages\trac-1.0-py2.7.egg\trac\config.py", line 661, in __get__
    value = self.accessor(section, self.name, self.default)
  File "C:\python\lib\site-packages\trac-1.0-py2.7.egg\trac\config.py", line 400, in get
    value = self.config.parser.get(name_str,key_str)
  File "C:\python\lib\ConfigParser.py", line 623, in get
    return self._interpolate(section, option, value, d)
  File "C:\python\lib\ConfigParser.py", line 666, in _interpolate
    value = value % vars
ValueError: incomplete format key

[Christian Boos]

  File "C:\python\lib\ConfigParser.py", line 666, in _interpolate

Ah right, the interpolate from hell ;-)

This is related to the topics discussed in #9091 and #9674.

I'm leaving this issue opened though instead of closing as duplicate, as we may want to start by fixing this specific issue by making the saved description "interpolation safe".

[Ryan J Ollos]

Moved ticket assigned to next-stable-1.0.x since maintenance of 1.0.x is coming to a close. Please move the ticket back if it's critical to fix on 1.0.x.

[Ryan J Ollos]

Milestone renamed