at org.apache.derby.iapi.util.StringUtil.hexDump causes ArrayIndexOutOfBoundsException in jvm code.

A call to at org.apache.derby.iapi.util.StringUtil.hexDump causes:
Caused by: java.lang.ArrayIndexOutOfBoundsException
at java.lang.CharacterDataLatin1.getProperties(CharacterDataLatin1.java:72)
at java.lang.CharacterDataLatin1.getType(CharacterDataLatin1.java:103)
at java.lang.Character.getType(Character.java:6734)
at java.lang.Character.isLetterOrDigit(Character.java:5658)
at java.lang.Character.isLetterOrDigit(Character.java:5637)
at org.apache.derby.iapi.util.StringUtil.hexDump(Unknown Source)
at org.apache.derby.impl.store.raw.data.CachedPage.changeInstanceTo(Unknown Source)
at org.apache.derby.impl.store.raw.data.CachedPage.setIdentity(Unknown Source)
at org.apache.derby.impl.services.cache.ConcurrentCache.find(Unknown Source)
at org.apache.derby.impl.store.raw.data.FileContainer.getAnyPage(Unknown Source)