Internal Error

Error: subscript is out of bounds: 8218

ByteArray(Object)>>errorSubscriptBounds:
ByteArray(Object)>>at:
WideString(String)>>findSubstring:in:startingAt:matchTable:
WideString(String)>>findString:startingAt:caseSensitive:
WideString(String)>>includesSubstring:caseSensitive:
[] in [] in PRFullTextSearch>>visitStructure:
[] in Set(Collection)>>anySatisfy:
Set>>do:
Set(Collection)>>anySatisfy:
[] in PRFullTextSearch>>visitStructure:
SortedCollection(OrderedCollection)>>do:
MAPriorityContainer(MAContainer)>>do:
PRFullTextSearch>>visitStructure:
PRFullTextSearch(PRVisitor)>>visitCase:
PRFullTextSearch(PRVisitor)>>visitPublication:
PRFullTextSearch(PRVisitor)>>visitPortion:
BOPortion>>accept:
BOPortion(Object)>>acceptDecorated:
[] in BOPortion(PRDecorated)>>acceptDecorated:
BOPortion(PRDecorated)>>decorationsDo:ownerDo: