Having just updated to the latest set of slackware current packages I found that the trusty old Dia would segfault:
** (dia:26707): CRITICAL **: dia_renderer_set_size: assertion `irenderer != NULL’ failed
With Ubuntu to the rescue 🙂 according to this report I found the fix to be:
Edit $(HOME)/.dia/persistence and change the value from false to true.
Please note that this fix works only if $(HOME)/.dia/persistence already exists. What this does (from the bug report):
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.