[Eric] Re: Eric4 help viewer causes pythonw.exe crash

[Detlev Offenbach]

Hi,

I just realized the same problem on a freshly installed system and now I know 
the cause. PyQt 4.4.4 contains a bug. You have to patch it and compile it 
yourself. The patch is included in the eric4 sources in the "patches" 
directory. It is the one called "qnetworkaccessmanager.sip.diff".

Without this patch, the crash will happen on ALL platforms.

Regards,
Detlev

On Mittwoch, 22. April 2009, Jaime Seuma wrote:
> Hi
>
> I've tried to debug eric4 in this regard. I've used eric4 for that
> debugging task, of course ;-)
>
> So far, I found that the 'linkActivated' signal, which is emitted in
> response to events happening in many areas of the HelpWindow, make
> Python crash:
> - HelpTocWidget.py, line 120:
>     self.emit(SIGNAL("linkActivated(const QUrl&)"), itm.url())
> - HelpIndexWidget. Double-clicking an item fires the Python crash
> - HelpSearchWidget. Double-clicking an item fires the Python crash
>
> First of all, it is a Python crash, not an eric4 crash.
> I'm using windows XP, and it shows a dialog explaining that pythonw made
> an illegal operation with qtnetwork4.dll.
>
> Wrapping the fore mentioned code (HelpTocWidget.py, line 120) with a
> try/catch block doesn't help; no Python exception is catched.
>
> I don't think that this python crash is caused by any of the eric4 code.
> I rather think that some version jam must be behind these crashes.
> I updated versions of most of the stuff involved with eric4 some weeks
> ago, but I've kept some of the older versions (python25, qt 4.4.0); and
> I believe that something must be misconfigured.
> Or that some dll mistakenly went to the %WINDIR%, or that some env
> variable must be corrected...
>
> Regards
>
> Detlev wrote:
>
> Hi Jaime, I tried it on my Windows installation and cannot reproduce the
> problem. Can you try to debug it? The only difference in version I can
> spot is sip. I have 4.7.8 installed. Regards, Detlev On Dienstag, 21.
>
> April 2009, Jaime Seuma wrote:
> > > In my desktop, the next secuence of actions causes pythonw.exe to
> > > crash, with the typical windows dialog of 'send report to microsoft':
> > > eric4 help->Qt4 Documentation.
> > > In the viewer, in the search textbox type something (for instance,
> > > QtCore) Then, in the results listbox, double click something (for
> > > instance, 'QtCore module')
> > >
> > > At this point pythonw.exe crashes. The process will remain active
> > > (killable from the task manager) and using a lot of cpu (>50%).
> > >
> > > My version numbers:
> > > Python 2.6.1
> > > Qt 4.5.0 (Nokia release Jan09)
> > > PyQt 4.4.4
> > > sip 4.7.9
> > > QScintilla 2.3.2
> > > eric4 4.4-snapshot-20090419 (r3045)
> > >
> > > I guess it would have something to do with some of this sw versions(?)
> > > therefore I don't think it is much of a critical issue.
> > >
> > > Cheers
> > >
> > > Jaime
>
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-- 
Detlev Offenbach
detlev at die-offenbachs.de