Possible Qt 6.03 Bug

[pixbyte]

I elevate my project to QT 6.03 and now I recognized that my TreeWidget do not show Icons by QFileIconProvider.
I rechecked the same code with 5.15.2 and the same code works.

  QFileIconProvider iconprovider;
  QIcon icon = iconprovider.icon(fileinfo);
  setIcon(0, icon);

On QT this icon is always not shown. A default icon loaded from resource works well, too. So I assume that QFileIconProvider has a bug.
Maybe someone can confirm?

I use:
Windows 10
VisualStudio 2019 64bit compiler
QT 6.03 Debug

Rechecked with:
Windows 10
VisualStudio 2019 64bit compiler
QT 5.15.2

[VRonin]

Bug is confirmed.
QTBUG-91104 is the general issue being worked, QTBUG-92030 is your specific case.

If you need a workaround (works in the current dev branch) you can set up a custom theme to hold the icons you want to use.

See this example on how to setup a custom theme.
The icons you need to provide are:

• "computer"
• "user-desktop"
• "user-trash"
• "network-workgroup"
• "drive-harddisk"
• "folder"
• "text-x-generic"

You could use Breeze or Oxygen icons from KDE if you need them