diff -r ae0af9fb3dbb -r cba8afa5cfed src/hotspot/share/prims/jvmtiTagMap.cpp
--- a/src/hotspot/share/prims/jvmtiTagMap.cpp	Mon Oct 21 09:26:14 2019 -0700
+++ b/src/hotspot/share/prims/jvmtiTagMap.cpp	Mon Oct 21 13:13:16 2019 -0400
@@ -1032,7 +1032,7 @@
 
 // helper function to tell if a field is a primitive field or not
 static inline bool is_primitive_field_type(char type) {
-  return (type != 'L' && type != '[');
+  return (type != JVM_SIGNATURE_CLASS && type != JVM_SIGNATURE_ARRAY);
 }
 
 // helper function to copy the value from location addr to jvalue.