README.md

Fastavro Avro Schema Traversal Crash

Benign local PoC for fastavro load_schema handling of referenced .avsc schemas.

Run:

reproduce.py

Expected success tokens:

MFV_FASTAVRO_TRAVERSAL_MARKER_CONFIRMED
MFV_FASTAVRO_SIGSEGV_CONFIRMED
MFV_REPRO_OK_MFV-46

The PoC uses only local schema files, subprocess isolation for the crashing case, and inert string markers. It does not use shell commands, network, secrets, persistence, or destructive file operations.