[PyQt] Fedora 25 & 26 PyQt5 segfaults on exit

[Rex Dieter]

Florian Bruhin wrote:

> On Wed, Jul 12, 2017 at 02:56:29PM -0500, Damon Lynch wrote:
>> On Tue, Jul 11, 2017 at 2:13 PM, Rex Dieter <rdieter at math.unl.edu> wrote:
>> 
>> > Damon Lynch wrote:
>> >
>> > > Hi,
>> > >
>> > > Is anyone else having their python3 / PyQt5 application crash on exit
>> > > every time when run with Fedora 25 and 26's version of PyQt5?
>> >
>> > I cannot reproduce what you describe on f25, but I'd welcome a
>> > bugreport with backtraces (if possible) anyway @ bugzilla.redhat.com
>> >
>> > I'm testing in a kde plasma environment, if that matters... I know
>> > there have been issues elsewhere in the past due to different platform
>> > plugins used, qgnomeplatform in particular
>> >
>> >
>> Hi Rex and Barry,
>> 
>> This particular instance stands out because it happens every time the
>> program runs with the Fedora PyQt5 package, and never with the Pypi
>> PyQt5, which is not something I've seen before. This makes it a bit
>> different from cases where it might happen occasionally because (for
>> example) a widget was not given a parent, leading to potential problems
>> during application close. I do believe this latter case is what you're
>> referring to Barry.
>> 
>> What do I need to do to generate an bug report that will actually be
>> usable to the Fedora PyQt maintainer? Do I need to install debug packages
>> and run some kind of debugging tool? It's been a couple of decades since
>> I coded in C/C++ so my knowledge of these tools is extremely limited.
> 
> Yes, you'd need to get a C++ stacktrace via gdb. I have this documented
> here for my project:
> 
https://github.com/qutebrowser/qutebrowser/blob/master/doc/stacktrace.asciidoc
> 
> I don't know whether Fedora has debugging packages though,

fedora does, for full debuginfo, run (as root):
dnf debuginfo-install python-qt5

-- Rex