QXcbConnection: XCB error: 8 (BadMatch)

[gde23]

Hello,

i have compiled my project on a machine running Debian Stretch and out of a sudden get many of these errors:

QXcbConnection: XCB error: 8 (BadMatch), sequence: 2409, resource id: 117440720, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 2429, resource id: 117440720, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 2432, resource id: 117440720, major code: 130 (Unknown), minor code: 3

What is this? (it doesn't seem to cause any problems, but still it can't be good to ignore it)
On Windows 7 as well as on another machine running Kubuntu they don't appear.

[SGaist]

Hi,

Are you running your OS on a physical machine or a virtual machine ?

[gde23]

Hi,
it's a physical maschine

[SGaist]

What desktop environment are you using ?
What window manager ?

[gde23]

Hi,

the desktop environment is KDE with kwin as window manager.
KDE version is 5:92
kwin version is 4:5.8.6-1

[SGaist]

Are you using the distribution provided Qt ?

[gde23]

@SGaist yes its the distribution Qt version.

i'm not sure if it has something to do with this, but i noticed, that i get some compiler warning about VTK:
VTK version is VTK-8.1.0

warning: 'QVTKWidget::QVTKWidget(QWidget*, Qt::WindowFlags)' is deprecated [-Wdeprecated-declarations]

or maybe you can tell me what the error means because i have absolutely no idea where to search for

[SGaist]

That's not an error, it's just a warning that you are using a method that is considered deprecated and you should consider updating your code.