Posted by Wade Walker on Apr 10, 2019; 12:04am
URL: https://forum.jogamp.org/NewtCanvasSWT-Linux-Exception-with-GTK-VERSION-tp4039442p4039687.html

I'm very glad you found this -- the next thing I was going to try was setting breakpoints on the native gdk_window_begin_draw_frame()/gdk_window_end_draw_frame() to see who initiated it the unmatched call, but it would have been difficult to see which method in the native code was responsible, and then figure out what to do about it. Your way was smarter and easier :)