[Qtwebengine] BUG: arguments to dbus_connection_dispatch() were incorrect

[Kevin Truong]

Hi staff,

I am using Qt WebEngine on a new machine. It didn't have problems with the
previous machines, but on the new machine when I run a Qt WebEngine
program, it outputs this error in the terminal:

process 30346: arguments to dbus_connection_dispatch() were incorrect,
assertion "connection != NULL" failed in
file ../../dbus/dbus-connection.c line 4559.
This is normally a bug in some application using the D-Bus library.

The program still runs fine and everything is rendered correctly, although
it seems much slower. I confirmed this is due to the QT code because when I
comment out anything that uses QtApplication, this message stops being
printed.

I built Qt5 and Qt WebEngine via the github repo (
https://github.com/qtproject/qt5), and tried both versions 5.6 and 5.5. The
machine I am using is ubuntu.

uname -a:
Linux test-render3 3.19.0-51-generic #57-Ubuntu SMP Fri Feb 19 14:05:05 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux

lsb_release -a:
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 15.04
Release:        15.04
Codename:       vivid


Any ideas how to fix this D-bus bug?

Best,
Kevin
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