msfroh commented on PR #14350:
URL: https://github.com/apache/lucene/pull/14350#issuecomment-2722105723

   My thinking is that a query that uses this should lowercase, dedupe, and 
sort the input before feeding it into `StringsToAutomaton`. That would handle 
@dweiss's example (i.e. that input is "invalid", or at least exact duplicates 
wouldn't add any new states, I think, since the full string exists as a prior 
prefix). 
   
   Would a check with `Character.isLowerCase()` on each input codepoint for the 
case-insensitive case be sufficient to reject that kind of input across all 
valid Unicode strings?


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