[PyKDE] problem with exceptions within events

Phil Thompson phil at riverbankcomputing.co.uk
Thu Feb 24 16:19:54 GMT 2005

> Giovanni Bajo <rasky at develer.com> wrote:
>>>> I have attached a more practical example, that shows the problem in
>>>> more
>>>> detail.
>> Thanks. I would call this a very serious bug.
>> BTW, let me notice that this does *not only* happen with an explicit
>> postEvent() call. Even though I am unable to reproduce it in a short
> snippet
>> at the moment, it happens also for other events (e.g. paintEvent) in my
>> application. Just a few minutes ago I had to use the debugger and trace
> step
>> by step to find a typo error (raising an exception) within a paintGL()
>> method, because it was *not* reported at all.
>> There is something weird going on.
> Some more information: I tried downgrading to my previous configuration
> (SIP
> 4.1.1, PyQt 3.13, Qt 3.3.2) and the problem does not occur anymore. I
> verified that it does not occur in either my application or Ulrich's
> testcase error_ui.py (after having tweaked for execution with old PyQt
> which
> does not have enum types), so I will assume that error_ui is a faithful
> reduction of my problem.
> This confirms that this bug is a regression introduced between PyQt 3.13
> and
> 3.14 (or SIP 4.1.1 and 4.2).

That's the information I was waiting for - thanks.

There was a change that was intended to make sure that exceptions raised
in Python re-implementations would ripple through without having to do
anything with exception hooks. I need to check, but I suspect that the
exception is being cleared too soon.


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