Crashes in VM_HeapDumper::work after JDK-8252842

serviceability/dcmd/gc/HeapDump*Test.java started failing with

V [jvm.dll+0xadea11] os::platform_print_native_stack+0xf1 (os_windows_x86.cpp:235)
V [jvm.dll+0xcfd625] VMError::report+0x1005 (vmError.cpp:742)
V [jvm.dll+0xcfefce] VMError::report_and_die+0x7fe (vmError.cpp:1552)
V [jvm.dll+0xcff754] VMError::report_and_die+0x64 (vmError.cpp:1333)
V [jvm.dll+0x4cdab7] report_vm_error+0xb7 (debug.cpp:282)
V [jvm.dll+0x1de1f] oopDesc::klass+0x9f (oop.inline.hpp:85)
V [jvm.dll+0x402374] oopDesc::is_instance+0x14 (oop.inline.hpp:206)
V [jvm.dll+0x660229] JNIGlobalsDumper::do_oop+0x29 (heapDumper.cpp:1634)
V [jvm.dll+0x77b4ee] JNIHandles::oops_do+0x1ce (jniHandles.cpp:168)
V [jvm.dll+0x665815] VM_HeapDumper::work+0x545 (heapDumper.cpp:2317)
V [jvm.dll+0xd4360a] GangWorker::loop+0x8a (workgroup.cpp:239)
V [jvm.dll+0xd436ad] GangWorker::run+0x1d (workgroup.cpp:206)

or

Stack: [0x00007f68407db000,0x00007f68408db000], sp=0x00007f68408d9c20, free space=1019k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x8ae7df] CompressedKlassPointers::decode_not_null(unsigned int, unsigned char*)+0x8f
V [libjvm.so+0xd80152] JNIGlobalsDumper::do_oop(oop*)+0x242
V [libjvm.so+0xfe6c26] JNIHandles::oops_do(OopClosure*)+0xd6
V [libjvm.so+0xd8a13b] VM_HeapDumper::work(unsigned int)+0x18b
V [libjvm.so+0x19f94f5] GangWorker::run_task(WorkData)+0x85

Probably after integration of JDK-8252842