Bug#814607: xvfb-run crashes with "Floating point exception" when trying to run qt5 example programs

[Danny Edel <debian@danny-edel.de>]

Package: xvfb
Version: 2:1.18.1-1
Severity: important
Control: fixed -1 2:1.18.0-3

Dear maintainer,

after running the testsuite from my package failed with the xvfb version
currently in sid, I found that the same problem also happens with the qt5
examples, so it may be a bug in the new xvfb version.

I am assuming this affects any application with a Qt5 gui component, so I
believe this qualifies as "important".

I hope I set the pseudo-headers above correctly to "The version in
stretch is not affected, but sid is", please correct it if I did it
wrong.

--- How to reproduce ---

1. install xvfb xauth qtbase5-examples, all from sid
2. run xvfb-run -a /usr/lib/x86_64-linux-gnu/qt5/examples/gui/analogclock/analogclock

Result: Immediately outputs "Floating point exception" and dies

--- Known Workaround ---

3. Add stretch to sources.list
4. apt install xvfb/stretch
5. repeat above xvfb-run command

Result:  Lots of warnings about the painter not being active, but no
"floating point exception" like with the sid version.  Program seems to
run, and has to be CTRL-C'd to quit.
(Also, with the xvfb version in stretch, my test suite passes, so it
seems to be operating normally.)


Thank you for maintaining xvfb,

- Danny