[Gambas-user] QT4, weird message and segfault

[Bruce]

Suddenly I am getting the following cryptic console message and a
segfault
	on_error_show_modal
It is happening in a form button Click event handler when I issue an
Error.Propogate in a Catch section of the handler.

grepping the source gives
	[gambassrc]$ grep -r on_error_show_modal *
	gb.qt4/src/CWindow.cpp [1763]:void on_error_show_modal(MODAL_INFO
*info)
	gb.qt4/src/CWindow.cpp [1765]:	qDebug("on_error_show_modal");
	gb.qt4/src/CWindow.cpp [1829]:	handler.handler =
(GB_CALLBACK)on_error_show_modal;
	
	gb.qt4/src/CWindow.h [246]:	friend void on_error_show_modal(MODAL_INFO
*info);

So, the message comes from gb.qt4/src/CWindow.cpp [1765] i.e. in
CWindow.on_error_show_modal(..), the only placed that is called is from
gb.qt4/src/CWindow.cpp [1829] i.e. in MyMainWindow::showModal(void).

What I can't work out is what it means and what to do about it.
Any clues?

(Rev 5934)

tia 
Bruce