"Internal server error" when trying to find objects

[jugmac00]

• fresh zope installation
• create new catalog
• hit find tab
• in the field besides modified enter any text (e.g. modified after lunch)

=> internal server error

traceback

2019-11-07 20:39:09 ERROR [Zope.SiteErrorLog:251][waitress] 1573155549.5665980.2757715629409838 http://localhost:8080/some_folder/animal_catalog/manage_catalogFoundItems
Traceback (innermost last):
  Module ZPublisher.WSGIPublisher, line 151, in transaction_pubevents
  Module ZPublisher.WSGIPublisher, line 333, in publish_module
  Module ZPublisher.WSGIPublisher, line 251, in publish
  Module ZPublisher.mapply, line 85, in mapply
  Module ZPublisher.WSGIPublisher, line 57, in call_object
  Module Products.ZCatalog.ZCatalog, line 328, in manage_catalogFoundItems
  Module Products.ZCatalog.ZCatalog, line 675, in ZopeFindAndApply
  Module DateTime.DateTime, line 443, in __init__
  Module DateTime.DateTime, line 754, in _parse_args
  Module DateTime.DateTime, line 994, in _parse
  File "<string>", line None

SyntaxError: lunch
2019-11-07 20:39:09 ERROR [waitress:363][waitress] Exception while serving /some_folder/animal_catalog/manage_catalogFoundItems
Traceback (most recent call last):
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/WSGIPublisher.py", line 151, in transaction_pubevents
    yield
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/WSGIPublisher.py", line 333, in publish_module
    response = _publish(request, new_mod_info)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/WSGIPublisher.py", line 251, in publish
    bind=1)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/mapply.py", line 85, in mapply
    return debug(object, args, context)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/WSGIPublisher.py", line 57, in call_object
    return obj(*args)
  File "/home/jugmac00/Tests/Zope/eggs/Products.ZCatalog-5.0.1-py3.6.egg/Products/ZCatalog/ZCatalog.py", line 328, in manage_catalogFoundItems
    apply_path=path)
  File "/home/jugmac00/Tests/Zope/eggs/Products.ZCatalog-5.0.1-py3.6.egg/Products/ZCatalog/ZCatalog.py", line 675, in ZopeFindAndApply
    obj_mtime = DateTime(obj_mtime).timeTime()
  File "/home/jugmac00/Tests/Zope/eggs/DateTime-4.3-py3.6.egg/DateTime/DateTime.py", line 443, in __init__
    return self._parse_args(*args, **kw)
  File "/home/jugmac00/Tests/Zope/eggs/DateTime-4.3-py3.6.egg/DateTime/DateTime.py", line 754, in _parse_args
    yr, mo, dy, hr, mn, sc, tz = self._parse(arg, datefmt)
  File "/home/jugmac00/Tests/Zope/eggs/DateTime-4.3-py3.6.egg/DateTime/DateTime.py", line 994, in _parse
    raise SyntaxError(st)
DateTime.interfaces.SyntaxError: lunch

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/jugmac00/Tests/Zope/eggs/waitress-1.3.1-py3.6.egg/waitress/channel.py", line 356, in service
    task.service()
  File "/home/jugmac00/Tests/Zope/eggs/waitress-1.3.1-py3.6.egg/waitress/task.py", line 172, in service
    self.execute()
  File "/home/jugmac00/Tests/Zope/eggs/waitress-1.3.1-py3.6.egg/waitress/task.py", line 440, in execute
    app_iter = self.channel.server.application(environ, start_response)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/httpexceptions.py", line 30, in __call__
    return self.application(environ, start_response)
  File "/home/jugmac00/Tests/Zope/eggs/Paste-3.1.1-py3.6.egg/paste/translogger.py", line 69, in __call__
    return self.application(environ, replacement_start_response)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/WSGIPublisher.py", line 338, in publish_module
    environ['REMOTE_USER'] = user.getUserName()
  File "/usr/lib/python3.6/contextlib.py", line 99, in __exit__
    self.gen.throw(type, value, traceback)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/WSGIPublisher.py", line 209, in transaction_pubevents
    reraise(*exc_info)
  File "/home/jugmac00/Tests/Zope/eggs/six-1.12.0-py3.6.egg/six.py", line 692, in reraise
    raise value.with_traceback(tb)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/WSGIPublisher.py", line 151, in transaction_pubevents
    yield
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/WSGIPublisher.py", line 333, in publish_module
    response = _publish(request, new_mod_info)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/WSGIPublisher.py", line 251, in publish
    bind=1)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/mapply.py", line 85, in mapply
    return debug(object, args, context)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/WSGIPublisher.py", line 57, in call_object
    return obj(*args)
  File "/home/jugmac00/Tests/Zope/eggs/Products.ZCatalog-5.0.1-py3.6.egg/Products/ZCatalog/ZCatalog.py", line 328, in manage_catalogFoundItems
    apply_path=path)
  File "/home/jugmac00/Tests/Zope/eggs/Products.ZCatalog-5.0.1-py3.6.egg/Products/ZCatalog/ZCatalog.py", line 675, in ZopeFindAndApply
    obj_mtime = DateTime(obj_mtime).timeTime()
  File "/home/jugmac00/Tests/Zope/eggs/DateTime-4.3-py3.6.egg/DateTime/DateTime.py", line 443, in __init__
    return self._parse_args(*args, **kw)
  File "/home/jugmac00/Tests/Zope/eggs/DateTime-4.3-py3.6.egg/DateTime/DateTime.py", line 754, in _parse_args
    yr, mo, dy, hr, mn, sc, tz = self._parse(arg, datefmt)
  File "/home/jugmac00/Tests/Zope/eggs/DateTime-4.3-py3.6.egg/DateTime/DateTime.py", line 994, in _parse
    raise SyntaxError(st)
  File "<string>", line None
SyntaxError: lunch

when you enter a number or try to guess a date format you get a different traceback
e.g. 10.10.2010

2019-11-07 20:41:22 ERROR [Zope.SiteErrorLog:251][waitress] 1573155682.67164590.1172741242200459 http://localhost:8080/some_folder/animal_catalog/manage_catalogFoundItems
Traceback (innermost last):
  Module ZPublisher.WSGIPublisher, line 151, in transaction_pubevents
  Module ZPublisher.WSGIPublisher, line 333, in publish_module
  Module ZPublisher.WSGIPublisher, line 251, in publish
  Module ZPublisher.mapply, line 85, in mapply
  Module ZPublisher.WSGIPublisher, line 57, in call_object
  Module Products.ZCatalog.ZCatalog, line 328, in manage_catalogFoundItems
  Module Products.ZCatalog.ZCatalog, line 723, in ZopeFindAndApply
  Module Products.ZCatalog.ZCatalog, line 962, in mtime_match
TypeError: 'object' object is not callable
2019-11-07 20:41:22 ERROR [waitress:363][waitress] Exception while serving /some_folder/animal_catalog/manage_catalogFoundItems
Traceback (most recent call last):
  File "/home/jugmac00/Tests/Zope/eggs/waitress-1.3.1-py3.6.egg/waitress/channel.py", line 356, in service
    task.service()
  File "/home/jugmac00/Tests/Zope/eggs/waitress-1.3.1-py3.6.egg/waitress/task.py", line 172, in service
    self.execute()
  File "/home/jugmac00/Tests/Zope/eggs/waitress-1.3.1-py3.6.egg/waitress/task.py", line 440, in execute
    app_iter = self.channel.server.application(environ, start_response)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/httpexceptions.py", line 30, in __call__
    return self.application(environ, start_response)
  File "/home/jugmac00/Tests/Zope/eggs/Paste-3.1.1-py3.6.egg/paste/translogger.py", line 69, in __call__
    return self.application(environ, replacement_start_response)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/WSGIPublisher.py", line 333, in publish_module
    response = _publish(request, new_mod_info)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/WSGIPublisher.py", line 251, in publish
    bind=1)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/mapply.py", line 85, in mapply
    return debug(object, args, context)
  File "/home/jugmac00/Tests/Zope/src/ZPublisher/WSGIPublisher.py", line 57, in call_object
    return obj(*args)
  File "/home/jugmac00/Tests/Zope/eggs/Products.ZCatalog-5.0.1-py3.6.egg/Products/ZCatalog/ZCatalog.py", line 328, in manage_catalogFoundItems
    apply_path=path)
  File "/home/jugmac00/Tests/Zope/eggs/Products.ZCatalog-5.0.1-py3.6.egg/Products/ZCatalog/ZCatalog.py", line 723, in ZopeFindAndApply
    or mtime_match(ob, obj_mtime, obj_mspec))
  File "/home/jugmac00/Tests/Zope/eggs/Products.ZCatalog-5.0.1-py3.6.egg/Products/ZCatalog/ZCatalog.py", line 962, in mtime_match
    if mtime is _marker():
TypeError: 'object' object is not callable