The recent fix for JDK-8048175 introduced a new unchecked warning in the previous clean core libraries code:

jdk/src/share/classes/com/sun/jndi/ldap/Connection.java:263: warning: [unchecked] unchecked cast
                    (socketFactory);
                    ^
  required: java.lang.Class<? extends javax.net.SocketFactory>
  found: java.lang.Class<capture#1 of ?>

This should be fixed to correct a regression in the lint warnings in core libs.