Failed to run cube demo on xcb_egl in Qt5.12.5

[LoopLou]

**I have installed the lxde desktop environment in Ubuntu18.04.
The DISPLAY=:0./ cube-platform xcb command is executed,The Segmentation fault (core dumping) is displayed.

I tried to turn on the debug message inside Qt and found that xcb_egl was successfully initialized

Qt eglfs on x11 is configured and compiled successfully. Is this issue related to desktop environment configuration?

[LoopLou]

This post is deleted!

[LoopLou]

The segment error statement is located under the qxcbeglwindow.cpp file:
qt-everywhere-src-5.15.9/qtbase/src/plugins/platforms/xcb/gl_integrations/xcb_egl/qxcbeglwindow.cpp

m_surface = eglCreateWindowSurface(m_glIntegration->eglDisplay(), m_config, m_window, nullptr);

Found that this function is an egl universal interface, I do not understand this aspect of the problem, who can solve the confusion?