Formal models and scripts: docvaluesstats-sorted-double-stats-decode-sortable-doubles-as-raw-bits

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

• SortedDoubleDocValuesStats (lucene/misc) reads core DoubleField values as raw IEEE bits, so negative values give a silently wrong min, sum and mean (DoubleField -5.0 and 3.0 give min -0.8749999999999999) (finding LFV-1129; repro · finding page)

Files

• sorteddoubledocvaluesstats-decodes-sortable-doublefield-as-raw-bits/model/mutation_fixed_decoder.py (used for LFV-1129)
• sorteddoubledocvaluesstats-decodes-sortable-doublefield-as-raw-bits/model/sortable_vs_raw.py (used for LFV-1129)

How to run

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

Snapshot of 2026-11-04. AI-assisted; not yet triaged by a human Lucene committer. Feedback: open an issue in lucene-ai-bug-hunt.