The VM crashes during heap verification with the report below:
;; Using jvm: "/net/jre.sfbay/p/v32/jdk/7/ea/b80/binaries/solaris-x64/fastdebug/jre/lib/amd64/server/libjvm.so"
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/BUILD_AREA/jdk7/hotspot/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp:2392), pid=2048, tid=15
# Error: guarantee(!failures,"there should not have been any failures")
#
# JRE version: 7.0-b80
# Java VM: Java HotSpot(TM) 64-Bit Server VM (17.0-b07-fastdebug mixed mode solaris-amd64 )
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#

--------------- T H R E A D ---------------

Current thread (0x0000000002e33800): VMThread [stack: 0xfffffd7fea250000,0xfffffd7fea350000] [id=15]

Stack: [0xfffffd7fea250000,0xfffffd7fea350000], sp=0xfffffd7fea34efd0, free space=3fb0000000000000001k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x1fa1f25];; void VMError::report(outputStream*)+0x685
V [libjvm.so+0x1fa2f8d];; void VMError::report_and_die()+0x4fd
V [libjvm.so+0xb2858b];; void report_fatal(const char*,int,const char*)+0x5ab
V [libjvm.so+0xc8cf9f];; void G1CollectedHeap::verify(bool,bool,bool)+0x49f
V [libjvm.so+0x1ee249c];; void Universe::verify(bool,bool,bool)+0x1ac
V [libjvm.so+0x1fd1182];; void VMThread::run()+0x142
V [libjvm.so+0x1a13ada];; java_start+0x66a
C [libc.so.1+0xd6e3b] _thr_slot_offset+0x31b;; _thr_setup+0x5b
C [libc.so.1+0xd7070] _thr_slot_offset+0x550;; _lwp_start+0x0