[QScintilla] autocomplete will cause seg fault?_?

[Jesse Meng]

Hi, I'm new to QScintilla, I want to use the autocomplete feature.
I use the demo in
http://www.kidstrythisathome.com/2011/08/autocompletion-using-pyqt4-and-qscintilla/
however, after complete some words I got the seg fault error!

Then I use eric4 source to test , same things happened just like
http://www.riverbankcomputing.com/pipermail/eric/2009-October/002116.html

 ubuntu 12.04 64bit
 python 2.7
 Qt 4.8
 PyQt 4.10
 QScintilla-gpl-2.8
 sip 4.15

anybody knows why?
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