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src/hotspot/share/ci/ciMethodData.cpp

MDO cleaning
 
 void ciReceiverTypeData::translate_receiver_data_from(const ProfileData* data) {
   for (uint row = 0; row < row_limit(); row++) {
     Klass* k = data->as_ReceiverTypeData()->receiver(row);
     if (k != NULL) {
-      ciKlass* klass = CURRENT_ENV->get_klass(k);
-      set_receiver(row, klass);
+      if (k->is_loader_alive()) {
+        ciKlass* klass = CURRENT_ENV->get_klass(k);
+        set_receiver(row, klass);
+      } else {
+        // With concurrent class unloading, the MDO could have stale metadata; override it
+        clear_row(row);
+      }
     }
   }
 }
 
 
    
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