I am trying to resurrect an old app, but it has a problem and my every attempt to debug has failed.

It's a network monitoring app for KDE, XFCE, LXDE, etc, and the first symptom is it will not create its /home/{USER}/.kde/share/config/knetrc file when it does not exist.  It does work when I manually create a knetrc file.

The second problem is, when I right-click on the app and choose About, it comes up fine.  But when I hit the Close button there the whole app crashes.

gdb isn't helpful.  Here I hit the About|Close:
/usr/local/src/knetbuild# gdb knet
GNU gdb (Debian 7.7.1+dfsg-3) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from knet...done.
(gdb) run
Starting program: /usr/local/src/knetbuild/knet
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
QPainter::begin: Paint device returned engine == 0, type: 2
QPainter::begin: Paint device returned engine == 0, type: 2
QPainter::begin: Paint device returned engine == 0, type: 2
QSystemTrayIcon::setVisible: No Icon set
[Inferior 1 (process 24933) exited normally]
(gdb) bt
No stack.

I'm pretty new at coding but am learning fast.  Any help is appreciated.


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