umbrello5 on a Windows 7 virtual box 5.22 guest on linux host from binary factory prints out the following message: OpenGL Warning: Assertion failed: g_pAvailableContexts[ctx->id] == ctx=0, file D:\tinderbox\add-5.1\src\VBox\GuestHost\OpenGL\state_tracker\state_init.c, line 443 OpenGL Warning: freeing context 0000000003a10080, id(0) not being in the context list OpenGL Warning: State tracker is being re-initialized.. STEPS TO REPRODUCE 1. download umbrello5 from https://binary-factory.kde.org/job/Umbrello_Nightly_win64/ 2. unpack archive, enter 'bin' dir and run umbrello5 OBSERVED RESULT The mentioned messages are displayed. EXPECTED RESULT The mentioned message should not be shown SOFTWARE/OS VERSIONS Windows: 7 (available in About System) KDE Frameworks Version: About System is not available yet, because app does not start, caused by bug 402289 Qt Version: About System is not available yet, because app does not start, caused by bug 402289 ADDITIONAL INFORMATION The problem has been reported at https://www.virtualbox.org/ticket/11889
The messages is gone.