Parsing a pywikibot generator over the pages referring [[:c:Template:Monument istoric]] started crashing when parsing the file https://commons.wikimedia.org/wiki/File:CATEDRALA_EVANGHELICA_SIBIU.jpg
The contents of the file_revision variable as parsed by PWB is: `{'descriptionurl': 'https://commons.wikimedia.org/wiki/File:CATEDRALA_EVANGHELICA_SIBIU.jpg', 'filemissing': '', 'descriptionshorturl': 'https://commons.wikimedia.org/w/index.php?curid=16462988'}`
The backtrace I get is:
```
Traceback (most recent call last):
File "pwb.py", line 321, in <module>
if not main():
File "pwb.py", line 316, in main
run_python_file(filename, [filename] + args, argvu, file_package)
File "pwb.py", line 101, in run_python_file
main_mod.__dict__)
File "./wikiro/robots/python/pywikipedia/monumente/parse_monument_article.py", line 708, in <module>
main()
File "./wikiro/robots/python/pywikipedia/monumente/parse_monument_article.py", line 635, in main
for page in pregenerator:
File "/home/andrei/pywikibot-core/pywikibot/pagegenerators.py", line 2219, in PreloadingGenerator
for page in generator:
File "/home/andrei/pywikibot-core/pywikibot/pagegenerators.py", line 1738, in NamespaceFilterPageGenerator
for page in generator:
File "/home/andrei/pywikibot-core/pywikibot/tools/__init__.py", line 1159, in filter_unique
for item in iterable:
File "/home/andrei/pywikibot-core/pywikibot/data/api.py", line 2824, in __iter__
for result in self._extract_results(resultdata):
File "/home/andrei/pywikibot-core/pywikibot/data/api.py", line 2773, in _extract_results
result = self.result(item)
File "/home/andrei/pywikibot-core/pywikibot/data/api.py", line 2925, in result
update_page(p, pagedata, self.props)
File "/home/andrei/pywikibot-core/pywikibot/data/api.py", line 3328, in update_page
page._load_file_revisions(pagedict['imageinfo'])
File "/home/andrei/pywikibot-core/pywikibot/page.py", line 2483, in _load_file_revisions
file_revision = FileInfo(file_rev)
File "/home/andrei/pywikibot-core/pywikibot/page.py", line 5696, in __init__
self.timestamp = pywikibot.Timestamp.fromISOformat(self.timestamp)
AttributeError: 'FileInfo' object has no attribute 'timestamp'
CRITICAL: Exiting due to uncaught exception <class 'AttributeError'>
```
This is probably caused by the weird first version of the file which has no preview and has probably been uncovered by the fix in T233392. A fix in PWB should probably include ignoring revisions containing the 'filemissing' flag (which is undocumented - see T109125) but seems to indicate a problem with the image.
However, I believe the MediaWiki team should probably also take a look at why that version is missing an image - @Aklapper , could you please add the relevant people in CC?