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Steps to reproduce: 1) Create Cube3D sample JavaFX project. 2) Set breakpoint on line 174 in method start(). 3) Start project in debugger (ctrl-F5). 4) when breakpoint is hit, step through code. Hit F8 on init() and show() methods, then F5 on play(). 5) Result is java.lang.NullPointerException at com.sun.tools.jdi.MirrorImpl.validateMirror(MirrorImpl.java:67)
*** This bug has been marked as a duplicate of bug 211701 ***