Using current Branch_4_0 gives:

13:23:37,339 WARN [ServiceController] Problem starting service jboss.j2ee:jndiName=ejb/AuctionLocal,service=EJB
java.lang.StringIndexOutOfBoundsException: String index out of range: 34
at java.lang.String.charAt(String.java:558)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCStartCommand.columnIndex(JDBCStartCommand.java:484)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCStartCommand.hasIndex(JDBCStartCommand.java:408)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCStartCommand.execute(JDBCStartCommand.java:180)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.startStoreManager(JDBCStoreManager.java:499)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.start(JDBCStoreManager.java:396)
at org.jboss.ejb.plugins.CMPPersistenceManager.start(CMPPersistenceManager.java:172)
at org.jboss.ejb.EntityContainer.startService(EntityContainer.java:354)

when alterTable is enabled (true).