The test is an testbase_nsk test:
    nsk/jvmti/StopThread/stopthrd007

This started occuring in tiger b42 and still fails in the c2 nightly test vm
on Mar. 30.

Note that when this bug is fixed, this stopthrd007 test will still fail
due to bug:
  4991286 thread misses ThreadDeath of StopThread on Server VM
    

The assertion is:
   ## Error: assert(SharedSkipVerify || obj->is_oop(),"sanity check")

The stack is:
V [libjvm.so+0x83c5e0] ;; __1cHVMErrorOreport_and_die6M_v_+0x420
V [libjvm.so+0x2b8dad] ;; __1cYreport_assertion_failure6Fpkci1_v_+0x4d
V [libjvm.so+0x351b9c] ;; __1cKHandleAreaPallocate_handle6MpnHoopDesc__p2_+0xfc
V [libjvm.so+0x8391f4] ;; __1cOcompiledVFrameScreate_stack_value6kMpnKScopeValue__pnKStackValue__+0x232
V [libjvm.so+0x838676] ;; __1cOcompiledVFrameGlocals6kM_pnUStackValueCollection__+0x156
V [libjvm.so+0x8367cb] ;; __1cSvframeArrayElementHfill_in6MpnOcompiledVFrame__v_+0x167
V [libjvm.so+0x837b91] ;; __1cLvframeArrayHfill_in6MpnKJavaThread_ipnNGrowableArray4CpnOcompiledVFrame___pknLRegisterMap_i_v_+0x9e
V [libjvm.so+0x837aa3] ;; __1cLvframeArrayIallocate6FpnKJavaThread_ipnNGrowableArray4CpnOcompiledVFrame___pnLRegisterMap_nFframe_9A9A9A_p0_+0x121
V [libjvm.so+0x2c6916] ;; __1cODeoptimizationScreate_vframeArray6FpnKJavaThread_nFframe_pnLRegisterMap__pnLvframeArray__+0x476
V [libjvm.so+0x2c5677] ;; __1cODeoptimizationYfetch_unroll_info_helper6FpnKJavaThread__pn0ALUnrollBlock__+0x1f7
V [libjvm.so+0x2c541f] ;; __1cODeoptimizationRfetch_unroll_info6FpnKJavaThread__pn0ALUnrollBlock__+0xcf

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
v ~DeoptimizationBlob
J nsk.jvmti.StopThread.stopthrd007ThreadRunning.run()V
v ~OSRAdapter
v ~StubRoutines::call_stub