src/hotspot/share/opto/parseHelper.cpp

*** 347,356 ****
--- 347,367 ----
  //------------------------------do_defaultvalue---------------------------------
  void Parse::do_defaultvalue() {
    bool will_link;
    ciValueKlass* vk = iter().get_klass(will_link)->as_value_klass();
    assert(will_link, "defaultvalue: typeflow responsibility");
+ 
+   // Should initialize, or throw an InstantiationError?
+   if (!vk->is_initialized() && !vk->is_being_initialized()) {
+     uncommon_trap(Deoptimization::Reason_uninitialized,
+                   Deoptimization::Action_reinterpret,
+                   vk);
+     return;
+   } else if (vk->is_being_initialized()) {
+     emit_guard_for_new(vk);
+   }
+ 
    // Create and push a new default ValueTypeNode
    push(ValueTypeNode::make_default(_gvn, vk));
  }
  
  //------------------------------do_withfield------------------------------------