Comment # 6 on bug 1206285 from Stefan Hundhammer

Created attachment 863461 [details]
Screenshot: YDialogSpy with the properties of that YLogView widget

Notice that "maxLines" was set to 0 which means "no limit". But the module does
not check first if the file has a reasonable size which is just plain wrong. We
do not have unlimited RAM, and the Qt widget that displays the text also may
have limits of its own.

Using that 0 value means that the application needs to take responsibility; and
here it does not, it just waits for something to overflow.