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C/C++ undefined behavior everywhere & AI agents build Paxos in Rust - Hacker News (May 20, 2026)

C/C++ undefined behavior everywhere & AI agents build Paxos in Rust - Hacker News (May 20, 2026)

Published 1 day, 7 hours ago
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Today's topics:

C/C++ undefined behavior everywhere - A longtime C/C++ developer argues undefined behavior is so widespread that “correct” nontrivial programs are elusive, with security and portability implications. Keywords: C, C++, UB, security, compilers.

AI agents build Paxos in Rust - An engineer used AI coding agents to build a production-style multi-Paxos engine in Rust, pairing code contracts with heavy testing to improve throughput and catch subtle bugs. Keywords: Rust, Paxos, consensus, tests, AI agents.

Gemini 3.5 and agentic Search - Google launched Gemini 3.5 Flash and rolled it into Search’s AI Mode, pushing longer-horizon agents, multimodal queries, and more proactive workflows. Keywords: Gemini 3.5, Google Search, AI Mode, agents, safety.

Preserving FiveThirtyEight in archive - A new site indexes over twenty thousand archived FiveThirtyEight pages, making a major data-journalism era searchable again via the Internet Archive. Keywords: FiveThirtyEight, Internet Archive, index, journalism, preservation.

Virtual OS Museum for emulation - The Virtual OS Museum bundles hundreds of historical OSes and apps into a ready-to-run VM with snapshots, lowering the friction of software preservation and retrocomputing. Keywords: emulation, virtual machine, OS history, QEMU, preservation.

Infomaniak locks in independence - Infomaniak shifted majority voting control to a Swiss public-interest foundation to block takeovers and formalize privacy and sovereignty commitments. Keywords: cloud, governance, digital sovereignty, foundation, privacy.

Japan hay fever and forestry - Japan’s hay fever surge is tied to postwar cedar and cypress monocultures, prompting long-term forest conversion plans balancing pollen reduction, carbon, and landslide resilience. Keywords: forestry, pollen, public health, biodiversity, Japan.



-Blog Post Claims Undefined Behavior Makes Most C and C++ Code Inherently Unreliable
-Building a Modern RSL-Style Paxos Engine in Rust With AI-Assisted Contracts and Tuning
-Google Launches Gemini 3.5 Flash to Power Faster Agentic Workflows and New Personal AI Agents
-New Index Site Makes 21,350 Archived FiveThirtyEight Pages Easy to Browse
-Virtual OS Museum bundles 570+ historical operating systems into a ready-to-run VM
-Japan’s Hay Fever Epidemic Traced to Postwar Cedar and Cypress Plantations
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