I'm unable to access the `request` object in my Pylons 0.9.7 controller when I set `debug = false` in the .ini file. I have the following code:

```
def run_something(self):
    print('!!! request = %r' % request)
    print('!!! request.params = %r' % request.params)
    yield 'Stuff'

```

With debugging enabled this works fine and prints out:

```
!!! request = <Request at 0x9571190 POST http://my_url>
!!! request.params = UnicodeMultiDict([... lots of stuff ...])

```

If I set `debug = false` I get the following:

```
!!! request = <paste.registry.StackedObjectProxy object at 0x4093790>
Error - <type 'exceptions.TypeError'>: No object (name: request) has been registered for this thread

```

The stack trace confirms that the error is on the `print('!!! request.params = %r' % request.params)` line.

I'm running it using the Paste server and these two lines are the very first lines in my controller method.

This only occurs if I have `yield` statements in the method (even though the statements aren't reached). I'm guessing Pylons sees that it's a generator method and runs it on some other thread. My questions are:

1. How do I make it work with `debug = false` ?
2. Why does it work with `debug = true` ? Obviously this is quite a dangerous bug, since I normally develop with `debug = true`, so it can go unnoticed during development.