To reproduce, run the following test program on Mac OS X.

java -cp dist/VideoCube.jar videocube.VideoCube

Java has been detached already, but someone is still trying to use it at -[GlassRunnable run]:/Users/kcr/javafx/8-kcr-gfx/jfx/rt/modules/graphics/src/main/native-glass/mac/GlassApplication.m:92
Java has been detached already, but someone is still trying to use it at -[GlassRunnable dealloc]:/Users/kcr/javafx/8-kcr-gfx/jfx/rt/modules/graphics/src/main/native-glass/mac/GlassApplication.m:106