src/share/vm/opto/macro.cpp

*** 849,858 ****
--- 849,859 ----
        if (iklass != NULL) {
          field = iklass->nonstatic_field_at(j);
          offset = field->offset();
          elem_type = field->type();
          basic_elem_type = field->layout_type();
+         assert(basic_elem_type != T_VALUETYPE, "value type fields are flattened");
        } else {
          offset = array_base + j * (intptr_t)element_size;
        }
  
        const Type *field_type;