Assertion on x86 when running -Xcomp with a number of tests:

#
# An unexpected error has been detected by Java Runtime Environment:
#
# Internal Error (/tmp/jprt-jprtadm/P1/B/155433.km88527/source/src/share/vm/runtime/frame.cpp:1146), pid=XXX, tid=XXX
# Error: assert(Universe::heap()->is_in_or_null(r),"bad receiver")
#
# Java VM: OpenJDK Client VM with MultiApp Extensions enabled (12.0-b01-2008-10-31-155433.km88527.hotspot-fastdebug XXX mode PLATFORM-ARCH)
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#


FAILED TESTS: 244
 1. solaris-i586-any/client/comp nsk/stress/jck12a/jck12a014
     DIR=vm//solaris-i586-any/client/comp/solaris-i586-any_client_comp_vm_nsk.stress.testlist_11D67135692/ResultDir/jck12a014/, vmsqe-v20z-01
 2. linux-i586-any/client/comp api/java_applet/Applet/index_ACMethods
     DIR=jck//linux-i586-any/client/comp/linux-i586-any_client_comp_jck_java_applet_11D67130480/workDir/api/java_applet/Applet/, vmsqe-core2q-16
 3. linux-i586-any/client/comp api/java_awt/BorderLayout/index_GetConstraints
     DIR=jck//linux-i586-any/client/comp/linux-i586-any_client_comp_jck_java_awt_11D671305CA/workDir/api/java_awt/BorderLayout/, vmsqe-core2q-19
 4. linux-i586-any/client/comp api/java_awt/BorderLayout/index_GetLayoutComponentByConstraints
     DIR=jck//linux-i586-any/client/comp/linux-i586-any_client_comp_jck_java_awt_11D671305CA/workDir/api/java_awt/BorderLayout/, vmsqe-core2q-19
 5. linux-i586-any/client/comp api/java_awt/BorderLayout/index_GetLayoutComponentByTargetAndConstraints

This is CRASH_ID=17 (224 test failures) from http://vmsqe.russia.sun.com/execution/results/HS-MOBILE/ADHOC/ALL/hsmobile-jdk6u5-hs12b01_v4-mvmon/P1_SerialGC/CRASHES.txt