Formal models and scripts: analysis-spi-chain-fuzz

Tools: Python

These are the working models and scripts this part of the hunt used. Some encode the code as it is (a counterexample is the expected result), others a fixed or correct variant; read the header comment of each file. Paths inside them were replaced by placeholders such as $LUCENE (a Lucene checkout) and $WORK.

Findings

• DictionaryCompoundWordTokenFilterFactory (main only) warns 'onlyLongestMatch has been removed' when the key is absent and stays silent when onlyLongestMatch="false" is passed (finding LFV-439; repro · finding page)

Files

• dictionarycompound-factory-onlylongestmatch-ignored/model/scan_factories.py (used for LFV-439)

How to run

• Python: python3 <file>.py; scripts that import z3 need the z3-solver package.

Snapshot of 2026-11-03. AI-assisted; not yet triaged by a human Lucene committer. Feedback: open an issue in lucene-ai-bug-hunt.