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Qt-interest Archive, March 2002
Qt 3.0.3 bug

• Subject: Qt 3.0.3 bug
• From: "Dmytro Ivanets" <di@xxxxxxxxx>
• Date: Fri, 22 Mar 2002 16:08:20 +0200
• Importance: Normal
• Reply-to: <di@xxxxxxxxx>
• To: "Qt interest" <qt-interest@xxxxxxxxxxxxx>

Hi All!

It seems i found a bug in Qt 3.0.3. Please, see the code below, which
produces crash:

	int numberOfElements = 1;
	QProgressDialog progress( "Copying files...", "Abort Copy",
numberOfElements,
		this, "progress", TRUE );
	progress.setMinimumDuration(0);
	for ( int i = 0; i < numberOfElements; i++ ) {
		progress.setProgress( i );
		qApp->processEvents();

		if ( progress.wasCancelled() )
			break;
	}
As far as i understood the bug is in qcommonstyle.cpp, line 734:

tnu = nu = p_v * u / (t_s - 1);

It's rare bug because Progress dialog is used mainly for long sequences, but
sometimes sequences we process contain just one element and then this bug
appears.

Best regards,
Dmytro Ivanets