Can't store Invalid object in session

I'm cross posting 2 messages that was originally posted on the pylons list.
The reason I'm cross posting it now is I now think this is specific to
formencode.  If the problem is that Invalid objects can't be pickled is
there a fix or a work around?

Thanks

[message 1]
Hi - I'm trying to set some session variables inside an exception handler of
FormEncode validation testing. It seems that if I try to save the result of
"error.error_dict" into a session variable all my session variables are
deleted.  I experimented with a bunch of different ways to narrow this down.
 All I have to do is not try to save error.error_dict and everything works
as expected.  My code looks like this:

import formencode
...

class FilesController(BaseController):
        def view_by_id(self):
                schema = ListForm()

                try:
                    form_result = schema.to_python(dict (request.params))
                except formencode.Invalid, error:
                    session['defaults'] = error.value
                    session['errors'] = error.error_dict or {} #comment out
this line and it saves ok
                    session.save()
                    redirect_to(controller='files', action='list')

class ListForm(formencode.Schema):
    allow_extra_fields = True
    filter_extra_fields = True
    file_select =
formencode.validators.Int<http://formencode.validators.int/>(not_empty=True)


I think I've posted enough of the code - it's pretty basic I think.  I
searched google/google groups but didn't find any similar problems so I must
be doing something wrong.
Any help is appreciated

[message 2]

I've found a conversation that led me to this open bug:
http://bugs.python.org/issue1692335 I think this is the problem that is not
allowing me to store this
object in session.

-- 
Chris Vickerson
chris-49n0//[email protected]

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