Having just updated to the latest set of slackware current packages I found that the trusty old Dia would segfault:
1 2 | ** (dia:26707): CRITICAL **: dia_renderer_set_size: assertion `irenderer != NULL' failed Segmentation fault |
With Ubuntu to the rescue 
according to this report I found the fix to be:
Edit $(HOME)
1 2 3 4 5 | <p id="yui_3_9_1_1_1369907323211_378"> <dia:boolean role="view_<wbr />antialised"<wbr />> <dia:attribute name="booleanva<wbr />lue"> <dia:boolean val="true"/> </dia:<wbr />attribute> </dia:boolean></p> |
Please note that this fix works only if $(HOME)
i.e. make the antialiased rendering default. And please don’t use the
View/AntiAliased menu item to toggle the renderer later, because that would
trigger the crash again.