--- old/src/share/vm/runtime/deoptimization.cpp	2017-06-14 12:29:23.400271099 +0200
+++ new/src/share/vm/runtime/deoptimization.cpp	2017-06-14 12:29:23.232271107 +0200
@@ -1145,7 +1145,7 @@
 
 // restore fields of an eliminated value type array
 void Deoptimization::reassign_value_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, valueArrayOop obj, ValueArrayKlass* vak, TRAPS) {
-  ValueKlass* vk = vak->element_klass();
+  ValueKlass* vk = (ValueKlass*)vak->element_klass();
   assert(vk->flatten_array(), "should only be used for flattened value type arrays");
   // Adjust offset to omit oop header
   int base_offset = arrayOopDesc::base_offset_in_bytes(T_VALUETYPE) - ValueKlass::cast(vk)->first_field_offset();