LdapLoginModule bug or intention?

[Martin Goldhahn]

I have the following login config to get UserPrincipals for groups:

COMBI {
  com.sun.security.auth.module.LdapLoginModule REQUIRED
  debug="true"
  userProvider="ldaps://ad01.uis.no/dc=uis,dc=no"
  userFilter="(&(sAMAccountName={USERNAME})(objectClass=user))"
  java.naming.security.principal="AD_DN"
  java.naming.security.credentials="PASSWORD"
  storePass="true"
  ;
  com.sun.security.auth.module.LdapLoginModule OPTIONAL
  debug="true"
  userProvider="ldaps://ad01.uis.no/dc=uis,dc=no"
  userFilter="(&(sAMAccountName={USERNAME})(objectClass=user)(memberOf=CN=Solr-Admin,OU=ServiceGroup,OU=Operation,OU=UIS,DC=uis,DC=no))"
  authzIdentity="SolrAdmin"
  java.naming.security.principal="AD_DN"
  java.naming.security.credentials="PASSWORD"
  useFirstPass="true"
  ;
  com.sun.security.auth.module.LdapLoginModule OPTIONAL
  debug="true"
  userProvider="ldaps://ad01.uis.no/dc=uis,dc=no"
  userFilter="(&(sAMAccountName={USERNAME})(objectClass=user)(memberOf=CN=FullServerAdmin_Utvikling,OU=AdminGroups,OU=Administration,DC=uis,DC=no))"
  authzIdentity="ServerAdmin"
  java.naming.security.principal="AD_DN"
  java.naming.security.credentials="PASSWORD"
  useFirstPass="true"
  ;
};

The first component succeeds, the second fails (due to the filter returning nothing), the third is supposed to succeed, but fails.
The reason is that the sharedState's password is cleared, even though clearPass is false (https://github.com/openjdk-mirror/jdk7u-jdk/blob/master/src/share/classes/com/sun/security/auth/module/LdapLoginModule.java#L1000)

Should it be 
username=null;
if (clearPass) {
  Arrays.fill(password, ' ');
 }
password = null;

OR is this by design?

--
Martin