A part of Apache Directory Studio I use a fair bit is the view of the RawSchemaDefinition within the Schema Editor. Attempting to use this in M9 (where I'm 99.99% sure it worked in M8, or whatever the previous public milestone was from 2013) yields nothing but the hyphen/dash that indicates nothing is there.
Steps to duplicate:
Point to a directory (ldap.forumsys.com:389 is public and duplicates the problem)
Click on Root DSE
LDAP (menu): Open Schema Editor
Click on any class or attribute and attempt to get information when expanding the RawSchemaDefinition field.
Expected Results: Show the raw schema definition.
Actual Results: No raw schema definition anymore.
I pointed to three different types of servers in case something was amiss with one of their schema representations, but all of them exhibit the same symptom, including the built-in ApacheDS instance that I created anew in Studio M9.