[Twisted-web] Problem using formless with a deferred value

[Gavrie Philipson]

Hi,

I am having a peculiar problem related to using a deferred value together with 
Nevow's formless:
When trying to return a deferred value from a formless autocallable, no result 
is returned to the browser even though the deferred does fire.

Attached is an example, based on the "formpost2.tac" example from the Nevow 
distribution, that illustrates the problem: Submitting the form causes the 
deferred to fire, but the browser hangs while waiting for the result (which 
is never sent).

I have tested this with the latest Nevow version from Subversion (updated 
today), together with both Twisted 1.3.0 and 1.1.0. The platform is Fedora 
Core 1, with Python 2.3.2.

This deferred-with-formless functionality used to work for me using an older 
version of Nevow (pre-0.1), but upgrading seems to have broken it.

Am I doing something wrong here, or is this a bug in Twisted or Nevow?

Thanks,

-- Gavrie.
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