Hi,
On Windows, running G[d|t]kGLArea items crash when running with GDK_GL=gles and GDK_DEBUG=opengl as there was an extraneous parameter in the g_message() call in a GDK_NOTE (OPENGL, ...) call upon the successful realization of the EGL/GLES (libANGLE) context on Windows. This attempts to fix it by dropping that parameter.
With blessings, thank you!