1 files changed, 4 insertions, 0 deletions
diff --git a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxwindow.cpp b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxwindow.cpp
index 8ae83b8084..a8d51d5e8c 100644
--- a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxwindow.cpp
+++ b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxwindow.cpp
@@ -59,6 +59,10 @@ const xcb_visualtype_t *QXcbGlxWindow::createVisual()
     if (!scr)
         return Q_NULLPTR;
     XVisualInfo *visualInfo = qglx_findVisualInfo(DISPLAY_FROM_XCB(scr), scr->screenNumber(), &m_format);
+    if (!visualInfo) {
+        qWarning() << "No XVisualInfo for format" << m_format;
+        return Q_NULLPTR;
+    }
     const xcb_visualtype_t *xcb_visualtype = scr->visualForId(visualInfo->visualid);
     XFree(visualInfo);
     return xcb_visualtype;