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Python: Model bytearray construction and take_bytes - #22746
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We model these as string-like taint preserving steps.
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Copilot review overview
🟢 Approval recommended
The implementation matches the documented behavior and includes comprehensive focused tests.
Review effort: Balanced
Findings: None
Adds taint-preserving models for Python byte-array construction and extraction.
Changes:
- Models taint flow through bytearray(...) and bytearray.take_bytes.
- Adds coverage for bound, unbound, aliased, partial, and consuming calls.
- Documents the analysis improvement.
| File | Description |
|---|---|
| TaintTrackingPrivate.qll | Implements byte-array taint steps. |
| test_bytearray.py | Tests supported flows and known imprecision. |
| 2026-09-22-python315-take-bytes.md | Adds the change note. |
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We model these as string-like taint preserving steps.