gendx/lzma-rs

Behavior mismatches between liblzma and lzma-rs

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#35 opened on Apr 16, 2020

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bughelp wanted

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Description

The attached files behave differently when decompressed with lzma-rs and with xz2 crate backed by lzma-sys: lzmars_xz2_mismatches.tar.gz

These files are generated by a fuzzer and do not have valid checksums in them. Checksum verification needs to be disabled in both implementations to reproduce the issue.

Found via #34

Contributor guide

Research direction
Replicate the issue by downloading the attached archive, disable checksum verification, and compare the decompressed output between lzma rs and liblzma. Trace the decoding steps to find where the mismatch occurs.
Tech stack
rust
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Rust
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35