[PyQt] [PyQt5] PyQt generating segfaults in very particular circumstances

[Dominique Cyprès]

Hello.

I've been running into segfaults in my current PyQt5 project. They
always occur upon closing my application's main window. I've narrowed
down the conditions necessary to reproduce this problem to these:

The QMainWindow must contain a QTabWidget which contains a QsciScintilla
widget as a tab, and that widget must be connected to a QsciLexer.
Additionally, the QsciScintilla widget must have been passed to the
QsciLexer constructor as an argument.

Unfortunately, I can't seem to get my QsciLexerCustom subclass to work
without passing the QsciScintilla object as an argument, even if I use
the lexer's setEditor method.

I've posted code that reproduces this problem on a pastebin:
http://pastebin.com/vQ1dYDqU

At this point I feel it's likely that I'm doing something wrong, but I
haven't a clue how to fix it.

Thanks in advance for any advice,
Dominique