[Mac] Login demo may crash the JVM

Run the public Scene Builder Login sample (zip attached)
Log with correct credentials (demo/demo).
Click Logout.
Then quit the app using the menu java->quit
The VM crashes.
Note that quitting the app by closing the window works well.


#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007fff94886f5e, pid=13507, tid=1799
#
# JRE version: Java(TM) SE Runtime Environment (8.0-b132) (build 1.8.0-b132)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.0-b70 mixed mode bsd-amd64 compressed oops)
# Problematic frame:
# C [libobjc.A.dylib+0xaf5e] objc_release+0xe
#
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /Users/slionsp/JavaFX/SceneBuilder-2.0/trunk-1/scenebuilder/samples/Login/hs_err_pid13507.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#