diff -r ae0af9fb3dbb -r cba8afa5cfed src/hotspot/share/ci/ciInstanceKlass.cpp
--- a/src/hotspot/share/ci/ciInstanceKlass.cpp	Mon Oct 21 09:26:14 2019 -0700
+++ b/src/hotspot/share/ci/ciInstanceKlass.cpp	Mon Oct 21 13:13:16 2019 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -116,7 +116,7 @@
                                  jobject loader, jobject protection_domain)
   : ciKlass(name, T_OBJECT)
 {
-  assert(name->char_at(0) != '[', "not an instance klass");
+  assert(name->char_at(0) != JVM_SIGNATURE_ARRAY, "not an instance klass");
   _init_state = (InstanceKlass::ClassState)0;
   _nonstatic_field_size = -1;
   _has_nonstatic_fields = false;