Formal models and scripts: sortednumeric-double-float-sortable-vs-raw-decoding-facet-and-join

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

• JoinUtil's numeric join reads a DoubleField or FloatField from field as raw IEEE bits, so a join on a negative value silently misses its matches (finding LFV-1111; repro · finding page)

Files

• joinutil-numeric-join-decodes-sortable-doublefield-as-raw-bits/model/decode_mismatch.py (used for LFV-1111)

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.