Reading up on debugging

A 40-year-old BSD kernel bug causes the first-ever fstat() on a UNIX domain socket to return inode 0 then a different inode on the second call, breaking a user-space TTY implementation in the author's iOS VM.

AppSignal's MCP server integrates with AI coding tools to deliver real-time performance insights, error tracking, and debugging support directly within developers' editors.

An iPhone 16 Pro Max produces garbage output when running MLX LLMs due to a hardware defect in the Neural Engine, while an iPhone 15 Pro runs the same code correctly.

Structured, high-cardinality logs with consistent schemas and correlation IDs improve debugging over traditional unstructured logs in distributed systems.