--- old/src/share/vm/classfile/javaClasses.cpp	2020-08-13 14:43:56.211114437 +0100
+++ new/src/share/vm/classfile/javaClasses.cpp	2020-08-13 14:43:56.078113058 +0100
@@ -1246,6 +1246,16 @@
 }
 
 
+// Return Symbol for detailed_message or NULL
+Symbol* java_lang_Throwable::detail_message(oop throwable) {
+  PRESERVE_EXCEPTION_MARK;  // Keep original exception
+  oop detailed_message = java_lang_Throwable::message(throwable);
+  if (detailed_message != NULL) {
+    return java_lang_String::as_symbol(detailed_message, THREAD);
+  }
+  return NULL;
+}
+
 void java_lang_Throwable::set_message(oop throwable, oop value) {
   throwable->obj_field_put(detailMessage_offset, value);
 }