I filed this bug as P2 because this bug is reproducible on sqao34, but not on sqao32.
Both machines are 64-bit RedHat, and have very similar hardware configurations.

To reproduce this bug against /set/mars build 40:
o rlogin to sqao34.sfbay
o /net/guild.sfbay/export/D0/common/shared_dist/mars/build40.0/intel-Linux/bin/sunstudio --userdir /tmp/0201 --jdkhome /net/guitest3/quantum/ifdef/jvm/intel-Linux/j2sdk1.6.0_01

# An unexpected error has been detected by Java Runtime Environment:
#
# Internal Error (4E4D4554484F440E435050071F), pid=28364, tid=2863303600
#
# Java VM: Java HotSpot(TM) Client VM (1.6.0_01-ea-b03 mixed mode)
# An error report file with more information is saved as hs_err_pid28364.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#
/set/mars/dist/intel-Linux/bin/sunstudio: line 455: 28364 Aborted (core dumped) "/net/guitest3/quantum/ifdef/jvm/intel-Linux/j2sdk1.6.0_01"/bin/java -classpath ":/shared/dp/mars/all/build40.0/intel-Linux.inst/opt/sun/sunstudio12/netbeans/platform6/lib/boot.jar:/shared/dp/mars/all/build40.0/intel-Linux.inst/opt/sun/sunstudio12/netbeans/platform6/lib/org-openide-modules.jar:/shared/dp/mars/all/build40.0/intel-Linux.inst/opt/sun/sunstudio12/netbeans/platform6/lib/org-openide-util.jar:/net/guitest3/quantum/ifdef/jvm/intel-Linux/j2sdk1.6.0_01/lib/dt.jar:/net/guitest3/quantum/ifdef/jvm/intel-Linux/j2sdk1.6.0_01/lib/tools.jar" "-Xms256m" "-Xmx1G" "-XX:PermSize=32m" "-XX:MaxPermSize=160m" -Dspro.home="/shared/dp/mars/all/build40.0/intel-Linux.inst/opt/sun/sunstudio12" -Dspro.pwd="/export/home/tester/mars-nb55/ss-nb55" -Dexted.xemacsconfig="/shared/dp/mars/all/build40.0/intel-Linux.inst/opt/sun/sunstudio12/prod/emacs_branding/sunstudio" -Dnetbeans.user="/tmp/0201" -Dnetbeans.home="/shared/dp/mars/all/build40.0/intel-Linux.inst/opt/sun/sunstudio12/netbeans/platform6" -Dspro.debugger.count=0 -Dnetbeans.dirs="/shared/dp/mars/all/build40.0/intel-Linux.inst/opt/sun/sunstudio12/netbeans/nb5.5:/shared/dp/mars/all/build40.0/intel-Linux.inst/opt/sun/sunstudio12/netbeans/ide7:/shared/dp/mars/all/build40.0/intel-Linux.inst/opt/sun/sunstudio12/netbeans/harness:/shared/dp/mars/all/build40.0/intel-Linux.inst/opt/sun/sunstudio12/netbeans/extra:/shared/dp/mars/all/build40.0/intel-Linux.inst/opt/sun/sunstudio12/netbeans/cnd1:/shared/dp/mars/all/build40.0/intel-Linux.inst/opt/sun/sunstudio12/atd1:/shared/dp/mars/all/build40.0/intel-Linux.inst/opt/sun/sunstudio12/prod" -client org.netbeans.Main -branding sunstudio