In snv_53, starting "javaws -viewer" results in the following crash:

#
# An unexpected error has been detected by Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0xbc2b8982, pid=1714, tid=15
#
# Java VM: Java HotSpot(TM) Server VM (1.6.0-rc-b100 mixed mode)
# Problematic frame:
# J java.util.HashMap.get(Ljava/lang/Object;)Ljava/lang/Object;
#
# An error report file with more information is saved as hs_err_pid2158.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#

I'm unable to launch any applications, as this same crash occurs if I pass a URL to a JNLP file on the command-line. A core dump and the hs_err_pid file mentioned in the above message are both attached to this CR.