src/java.base/share/classes/jdk/internal/reflect/UnsafeQualifiedObjectFieldAccessorImpl.java

*** 34,44 ****
          super(field, isReadOnly);
      }
  
      public Object get(Object obj) throws IllegalArgumentException {
          ensureObj(obj);
!         return isFlatValue() ? unsafe.getValue(obj, fieldOffset, field.getType())
                               : unsafe.getReferenceVolatile(obj, fieldOffset);
      }
  
      public boolean getBoolean(Object obj) throws IllegalArgumentException {
          throw newGetBooleanIllegalArgumentException();
--- 34,44 ----
          super(field, isReadOnly);
      }
  
      public Object get(Object obj) throws IllegalArgumentException {
          ensureObj(obj);
!         return isFlattened() ? unsafe.getValue(obj, fieldOffset, field.getType())
                               : unsafe.getReferenceVolatile(obj, fieldOffset);
      }
  
      public boolean getBoolean(Object obj) throws IllegalArgumentException {
          throw newGetBooleanIllegalArgumentException();
*** 78,88 ****
          ensureObj(obj);
          if (isReadOnly) {
              throwFinalFieldIllegalAccessException(value);
          }
          checkValue(value);
!         if (isFlatValue()) {
              unsafe.putValue(obj, fieldOffset, field.getType(), value);
          } else {
          unsafe.putReferenceVolatile(obj, fieldOffset, value);
          }
      }
--- 78,88 ----
          ensureObj(obj);
          if (isReadOnly) {
              throwFinalFieldIllegalAccessException(value);
          }
          checkValue(value);
!         if (isFlattened()) {
              unsafe.putValue(obj, fieldOffset, field.getType(), value);
          } else {
          unsafe.putReferenceVolatile(obj, fieldOffset, value);
          }
      }