designer-qt5 seg faults when invoked

[David Boddie]

On Tue Jan 26 16:33:09 GMT 2021, Rich Shepard wrote:

> I run Slackware-14.2/x86_64 on all hosts. This desktop has installed
> qt-4.8.7-x86_64-4, qt5-5.12.8-x86_64-1_SBo, qt-creator-4.12.3-x86_64-1_SBo,
> PyQt5-5.13.2-x86_64-1_SBo, and python3-PyQt5-5.13.2-x86_64-1_SBo. Perhaps
> the last two conflict and cause the problems I have trying to load
> designer-qt5.
> 
> I haven't found a Qt maillist so I hope it's appropriate for me to ask for
> help here.

You may be looking for the Qt interest mailing list:
https://lists.qt-project.org/pipermail/interest/

But it's OK to ask here. If you think the problem is related to Slackware,
you could also ask for advice on a Slackware mailing list or forum.

> I'm building my first PyQt5/Python3 application; a front end to the business
> management database I've used with the psql shell for several years to track
> my business development efforts.
> 
> In /usr/bin/ there are the Qt4 and Qt5 designers: /usr/bin/designer ->
> /usr/lib64/qt/bin/designer* and /usr/bin/designer-qt5 ->
> /usr/lib64/qt5/bin/designer*. The former loads, the latter seg faults when I
> try to load it:
> $ designer-qt5
> Segmentation fault
> 
> I've no idea how to figure out why this happens. The seg fault signal
> provides no clue regarding what caused the problem. I'm asking for
> suggestions, recommendations, advice, and other help to resolve this issue.

If you have debug packages installed, do you get a backtrace if you run it
with gdb?

Alternatively, you could run it with strace and see if it's trying to access
a particular file when it crashes.

David