Preliminary subject, please change as we find out more.

#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/home/jenkins/workspace/nightly/jdk-jdk/src/hotspot/share/oops/klass.hpp:422), pid=54238, tid=16900
# assert(l2esz <= LogBytesPerLong) failed: sanity. l2esz: 0x37 for lh: 0xf7f7f7f7

Stack: [0x00007f3461fcf000,0x00007f34620cf000], sp=0x00007f34620cd400, free space=1017k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x6fd64e] oopDesc::size_given_klass(Klass*)+0x1fe
V [libjvm.so+0x151c304] void ShenandoahHeap::marked_object_iterate<ShenandoahConcurrentEvacuateRegionObjectClosure>(ShenandoahHeapRegion*, ShenandoahConcurrentEvacuateRegionObjectClosure*, HeapWordImpl**) [clone .constprop.361]+0x4f4
V [libjvm.so+0x151c9e3] ShenandoahEvacuationTask::do_work()+0x83
V [libjvm.so+0x151ccef] ShenandoahEvacuationTask::work(unsigned int)+0x1bf
V [libjvm.so+0x180e5fc] GangWorker::loop()+0xac
V [libjvm.so+0x16ddc76] Thread::call_run()+0xf6
V [libjvm.so+0x1304106] thread_native_entry(Thread*)+0x116