Description:
Running qtdiag under Wayland on a KDE Plasma 6 session causes a segmentation fault when using an AMD Radeon RX 6750 XT GPU with the radeonsi driver. The error message is:
QOpenGLFunctions created with non-current context
Segmentation fault (core dumped)
This crash is specific to Wayland. Under X11, qtdiag works without issues.

Steps to reproduce:

1. Log into a Wayland session (KDE Plasma 6).

1. Run:  qtdiag

• Observe the crash and output.

• Confirm that the issue does not occur under X11:
  XDG_SESSION_TYPE=x11 QT_QPA_PLATFORM=xcb qtdiag

Expected result:
qtdiag should display diagnostic information without crashing.

Actual result:
It immediately prints:
QOpenGLFunctions created with non-current context
Segmentation fault (core dumped)
 

Additional Info:

• qtdiag works if launched with:
  XDG_SESSION_TYPE=x11 QT_QPA_PLATFORM=xcb qtdiag

• Other Qt6 and Qt5 applications (e.g. Cantata, Dolphin, Kate) work fine under Wayland with the same GPU and driver stack.

• No Qt style override tools (like kvantum or qt5ct) are installed.

• Setting QT_STYLE_OVERRIDE to Breeze, Oxygen, or Fusion does not prevent the crash.

• Forcing software rendering (LIBGL_ALWAYS_SOFTWARE=1) allows qtdiag to run without crashing, suggesting an OpenGL + context management issue in Wayland mode.

ldd output:
ldd /usr/bin/qtdiag | grep -iE 'libgl|libglx|libegl'
libGL.so.1 => /usr/lib/libGL.so.1
libGLdispatch.so.0 => /usr/lib/libGLdispatch.so.0
libGLX.so.0 => /usr/lib/libGLX.so.0

libGLX.so.0 => /usr/lib/libGLX.so.0{}