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Everything in C is undefined behavior
Undefined Behavior in C 🤯
The article "Everything in C is undefined behavior" highlights the surprising reality that virtually any operation in the C programming language can be considered undefined behavior under certain conditions, leading to unpredictable program behavior. This matters because it directly impacts the reliability and security of software written in C, making it crucial for developers to understand these nuances to write robust code.
8:05 am, May 20, 2026
guid
https://news.ycombinator.com/item?id=48203698
source_url
https://blog.habets.se/2026/05/Everything-in-C-is-undefined-behavior.html
author_name
lycopodiopsida
id: 2984
uid: bA7M3
insdate: 2026-05-20 08:05:05
title: Everything in C is undefined behavior
additional:
The article "Everything in C is undefined behavior" highlights the surprising reality that virtually any operation in the C programming language can be considered undefined behavior under certain conditions, leading to unpredictable program behavior. This matters because it directly impacts the reliability and security of software written in C, making it crucial for developers to understand these nuances to write robust code.
category: Hacker News
md5:
guid: https://news.ycombinator.com/item?id=48203698
source_url: https://blog.habets.se/2026/05/Everything-in-C-is-undefined-behavior.html
updated:
image:
author_name: lycopodiopsida
author_link:
uid: bA7M3
insdate: 2026-05-20 08:05:05
title: Everything in C is undefined behavior
additional:
Undefined Behavior in C 🤯
The article "Everything in C is undefined behavior" highlights the surprising reality that virtually any operation in the C programming language can be considered undefined behavior under certain conditions, leading to unpredictable program behavior. This matters because it directly impacts the reliability and security of software written in C, making it crucial for developers to understand these nuances to write robust code.
category: Hacker News
md5:
guid: https://news.ycombinator.com/item?id=48203698
source_url: https://blog.habets.se/2026/05/Everything-in-C-is-undefined-behavior.html
updated:
image:
author_name: lycopodiopsida
author_link:
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- Ask HN: How did you land your first projects as a solo engineer/consultant?
- Ask HN: How do you handle marketing as a solo technical founder?
- Ask HN: How is AI-assisted coding going for you professionally?
- Ask HN: How to Be Alone?
- Ask HN: How to be SOC2 Type 2 compliant as a solo-entreprenuer?
- Ask HN: Is "no source code was copied" still a sufficient copyright defense?
- Ask HN: Is GitHub preparing to go behind a login wall?
- Ask HN: Is anyone experimenting with different ways of using LLMs for coding?
- Ask HN: Is anyone working at least 4 hours daily on an Apple Vision Pro?
- Ask HN: My ISP is telling my neighbors their slow internet is because of me
- Ask HN: Please restrict new accounts from posting
- Ask HN: Remember Fidonet?
- Ask HN: Share your productive usage of OpenClaw
- Ask HN: So what happened to Facebook "localhost" tracking?
- Ask HN: What Are You Working On? (July 2026)
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- Ask HN: Why hasn't there been a real competitor to Ticketmaster yet?
- Ask HN: Why is the HN crowd so anti-AI?
- Ask HN: Will programmers write more efficient code during the memory shortage?
- Ask.com has closed
- Aspartame is not that bad?
- Assessing Claude Mythos Preview's cybersecurity capabilities
- Astra: An open-source observatory control software
- Astro 7.0
- Astronomers Find the Edge of the Milky Way
- Astronomers find the edge of the Milky Way
- Astrophysicists Puzzle over Webb’s New Universe
- Async Programming Is Just Inject Time
- Async Rust never left the MVP state
- At Protocol: Building the Social Internet
- At least 10 people tied to sensitive US research have died or disappeared
- At long last, InfoWars is ours
- Atlassian Enables Default Data Collection to Train AI
- Atlassian defends firing engineer for suggesting CEO is 'rich jerk'
- Atlassian to cut roughly 1,600 jobs in pivot to AI
- Atomic Display Switching: Solving
- Attie.ai
- Attorney General Pam Bondi Out at DOJ
- Attractive students no longer receive better results as classes moved online
- Attyx – tiny and fast GPU-accelerated terminal emulator written in Zig
- Atuin v18.13 – better search, a PTY proxy, and AI for your shell
- Austin’s surge of new housing construction drove down rents
- Austria Lobbies EU to Host Anthropic After US Access Curbs
- AutoKernel: Autoresearch for GPU Kernels
- Automation Without Understanding
- Autoresearch for SAT Solvers
- Autoresearch: Agents researching on single-GPU nanochat training automatically
- Avian Visitors
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- AyaFlow: A high-performance, eBPF-based network traffic analyzer written in Rust
- Azure Linux 4.0 is Microsoft's first general-purpose Linux
- Azure Linux Desktop
- B-trees and database indexes (2024)
- BBEdit 16
- BLISS
- BMW Group to deploy humanoid robots in production in Germany for the first time
- BYD is bringing its 5-min 'Flash' electric car charging to Canada
- BYD overtakes Tesla and Kia as the best-selling EV brand in key overseas markets
- BYD's bet on EVs is paying off as drivers ditch gas amid rising oil prices
- BYOMesh – New LoRa mesh radio offers 100x the bandwidth
- Backblaze has stopped backing up your data
- Backpressure is all you need
- Bacteria found in the human intestine capable of improving muscle strength
- BambuStudio has been violating PrusaSlicer AGPL license since their fork
- Bankruptcies increase 11.9 percent
- Banned Book Library in a Wi-Fi Smart Light Bulb
- Banned in California
- BareMetal RAM Dumper – Bare-metal x86 tool for Cold Boot Attack experiments
- Bars close and hundreds lose jobs as US firm buys Brewdog in £33M deal
- Bashblog – a single bash script to create blogs
- Battle for Wesnoth: open-source, turn-based strategy game
- Bcachefs creator insists his custom LLM is female and 'fully conscious'
- Be Alexandra Elbakyan
- Be intentional about how AI changes your codebase
- Becoming a dad changes men's brains
- Becoming a father shrinks your cerebrum
- Beer CSS – Build material design in record time
- Before GitHub
- Behavior-Oriented Concurrency for Python
- Belgium stops decommissioning nuclear power plants
- Benchmarking coding agents on Databricks' multi-million line codebase
- Benchmarks in Leipzig
- Benedict Evans: AI eats the world (Spring 26) [pdf]
- Besimple AI (YC P25) Is Hiring
- Bet on German Train Delays
- Better Images of AI
- Better JIT for Postgres
- Beyond Semantic Similarity
- Beyond has dropped “meat” from its name and expanded its high-protein drink line
- Bible as RAG Database
- Biff is a command line datetime Swiss army knife
- Biff.core: system composition for Clojure web apps
- Big AI labs are hiring philosophers
- Big Banana Car
- Big Breakfast Alters Appetite, Gut Health
- Big Data on the Cheapest MacBook
- Big tech's anti-labor playbook has come for Wikipedia
- Bild AI (YC W25) Is Hiring Founding Product Engineers
- Bild AI (YC W25) Is Hiring Interns to Make Housing Affordable
- Bild AI (YC W25) Is Hiring a Founding Product Engineer
- Billion-Parameter Theories
- Binary Coverage the Wrong Way
- Binary GCD
- Biology is a Burrito: A text- and visual-based journey through a living cell
- Biscuit
- Bitburner, programming-based incremental game
- Bitcoin and quantum computing
- Bitcoin miners are losing $19,000 on every BTC produced as difficulty drops 7.8%
- Bitmap fonts make computers feel like computers again
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- Bjarne Stroustrup: How do I deal with memory leaks? (2022)
- Blacksky AppView
- Blaise – A modern self-hosting zero-legacy Object Pascal compiler targeting QBE
- Block spent $68M on a single party in September 2025
- Block the "Upgrade to Tahoe" Alerts
- Block the “Upgrade to Tahoe” Alerts
- Blocking Internet Archive Won't Stop AI, but Will Erase Web's Historical Record
- Blog ran on Ubuntu 16.04 for 10 years. I migrated it to FreeBSD
- Blogger defeats photographer's copyright claim
- Blogging can just be stating the obvious
- Blood test boosts Alzheimer's diagnosis accuracy to 94.5%, clinical study shows
- Bloom (YC P26) Is Hiring
- Blorp Language
- Blue Origin's New Glenn blows up during static fire test
- Bluesky CEO Jay Graber is stepping down
- Bluesky has been dealing with a DDoS attack for nearly a full day
- Bobby Prince, composer for Doom, Wolfenstein 3D, and Duke Nukem 3D, has died
- Boffin claims Microsoft’s “quantum leap” is invalid due to “basic Python errors”
- Bombarding gamblers with offers greatly increases betting and gambling harm
- Books Are Not Remotely Too Expensive
- Boot Naked Linux
- Bootc and OSTree: Modernizing Linux System Deployment
- Bootimus – A Self-Contained PXE and HTTP Boot Server
- Borrow-checking without type-checking
- Boss-CSS: I created another "CSS-in-JS" lib
- Bot vs human traffic
- Bouncer: Block "crypto", "rage politics", and more from your X feed using AI
- Boy I was wrong about the Fediverse
- Brazil's Pix Payment System Faces Pressure from Visa and Mastercard
- Breaking Down 50M Pins: A Smarter Way to Design 3D IC Packages
- Breaking Free
- Breakthroughs for batteries could soon make them better
- Bricks and Minifigs Stole a Man's $200k Lego Collection
- Bring Back Idiomatic Design
- Bring back crappy forums
- Bring your own Agent to MS Teams
- Bringing Chrome to ARM64 Linux Devices
- Bringing Up DeepSeek-V4-Flash on AMD MI300X
- Britain is ejecting hereditary nobles from Parliament after 700 years
- Britain today generating 90%+ of electricity from renewables
- British Columbia to end time changes, adopt year-round daylight time
- British Columbia, Time Zones, and Postgres
- Bubble Sorted Amen Break
- Bucketsquatting is (finally) dead
- Buckle Up for Bumpier Skies
- Bugs Rust won't catch
- Build your own Dial-up ISP with a Raspberry Pi
- Build your own vulnerability harness
- BuildKit: Docker's Hidden Gem That Can Build Almost Anything
- Building Better Country Selects
- Building Gin: Simple over Easy
- Building Pi with Pi
- Building Principia for Windows XP
- Building a Blog with Elixir and Phoenix
- Building a JavaScript runtime in one month
- Building a Minimal Transformer for 10-digit Addition
- Building a Procedural Hex Map with Wave Function Collapse
- Building a SaaS in 2026 Using Only EU Infrastructure
- Building a Shell
- Building a UMatrix Replacement
- Building a Z-Machine in the worst possible language – Whitebeard's Realm
- Building a new Flash
- Building a real-time AI tutor for 5-year-olds
- Building a serial and VGA "everything console"
- Building an E2E Encrypted Chat Application with LanceDB and Libsodium
- Building an FPGA 3dfx Voodoo with Modern RTL Tools
- Building an HTML-first site doubled our users overnight
- Building an Open-Source Robot Vacuum – Meet Oomwoo
- Building for the Future
- Building from Zero After Addiction, Prison, and a Felony
- Building from zero after addiction, prison, and a felony
- Building relationships with customers through support didn't turn out as hoped
- Building reliable agentic AI systems
- Building the TD4 4-Bit CPU
- Bun has an open PR adding shared-memory threads to JavaScriptCore
- Bun is being ported from Zig to Rust
- Bun's unreleased Rust port has 13,365 unsafe blocks
- Bun: cgroup-aware AvailableParallelism / HardwareConcurrency on Linux
- BunnyCDN has been silently losing our production files for 15 months
- Burnout is real for open source maintainers
- Bus stop balancing is fast, cheap, and effective
- Butterflies are in decline across North America, a look at the Western Monarch
- Byrne's Euclid
- C# strings silently kill your SQL Server indexes in Dapper
- C++26 is done ISO C++ standards meeting, Trip Report
- C++: The Documentary
- C, Just In Time!
- C64 Basic: Game Map Overhead "Camera View"
- CATL's new LFP battery can charge from 10 to 98% in less than 7 minutes
- CBP Directive 3340-049B: Border Search of Electronic Devices
- CBP updated its electronic device search directive in Jan 2026
- CC-Canary: Detect early signs of regressions in Claude Code
- CC-Wiki: Turn Claude Code sessions into a shareable knowledge base wiki
- CEOs Who Think AI Replaces Their Employees Are Just Bad CEOs
- CERN levels up with new superconducting karts
- CERN to host a new phase of Open Research Europe
- CERN uses tiny AI models burned into silicon for real-time LHC data filtering
- CERT is releasing six CVEs for serious security vulnerabilities in dnsmasq
- CISA Admin Leaked AWS GovCloud Keys on GitHub
- CODA: Rewriting Transformer Blocks as GEMM-Epilogue Programs
- CPanel and WHM Authentication Bypass – CVE-2026-41940
- CPanel's Black Week: 3 New Vulnerabilities Patched After Attack on 44k Servers
- CRDTs merge concurrent edits. Why not concurrent creation?
- CSP for Pentesters: Understanding the Fundamentals
- CSS as a Query Language
- CSS is DOOMed
- CSS-Native Parallax Effect
- CSSQuake
- CT scans of BYD car parts
- CUDA-oxide: Nvidia's official Rust to CUDA compiler
- CVE-2026-28952: Apple macOS 26.5 Kernel Vuln found by Claude
- CVE-2026-31431: Copy Fail vs. rootless containers
- CVE-2026-3888: Important Snap Flaw Enables Local Privilege Escalation to Root
- CVE-Bench: testing LLM agents on real-world vulnerability patches
- Cal.diy: open-source community edition of cal.com
- California bill would require patches or refunds when online games shut down
- California farmers to destroy 420k peach trees following Del Monte bankruptcy
- California ghost-gun bill wants 3D printers to play cop, EFF says
- California moves to exempt Linux from its age-verification law after backlash
- California to begin ticketing driverless cars that violate traffic laws
- California's Battery Array Is as Powerful as 12 Nuclear Power Plants
- California's Digital Age Assurance Act, and FOSS
- Cambodia unveils a statue of famous landmine-sniffing rat Magawa
- Can Claude Fly a Plane?
- Can I disable all data collection from my vehicle?
- Can We Understand How Large Language Models Reason?
- Can a wealthy family change the course of a deadly brain disease?
- Can the stockmarket swallow Anthropic, SpaceX and OpenAI?
- Can we code our way out of gentrification?
- Can we have the day off?
- Can you instruct a robot to make a PBJ sandwich?
- Can you stop beans from making you gassy?
- Can't Stop the Signal. Poison It
- Canada is looking to build up to 10 new nuclear reactors over the next 15 years
- Canada plans 'nuclear renaissance' with up to 10 reactors built by 2040
- Canada to order military plane fleet from Sweden in shift from US suppliers
- Canada's bill C-22 mandates mass metadata surveillance
- Canada's bill C-22 mandates mass metadata surveillance of Canadians
- Canada’s Bill C-22 Is a Repackaged Version of Last Year’s Surveillance Nightmare
- Cancel ChatGPT AI boycott surges after OpenAI pentagon military deal
- Cannabinoids remove plaque-forming Alzheimer's proteins from brain cells
- Cannabinoids remove plaque-forming Alzheimer's proteins from brain cells (2016)
- Cannibalism
- Canonical Under Attack
- Canvas (Instructure) LMS Down in Ongoing Ransomware Attack
- Canvas is down as ShinyHunters threatens to leak schools’ data
- Capability-Based Security for Redox: Namespace and CWD as Capabilities
- Capitalism Gone Wrong
- Capstone – multi-platform, multi-architecture disassembly framework
- Captcha proves you're human. HATCHA proves you're not
- Capybara: A Unified Visual Creation Model
- CarPlay Is Additive
- Carbon dioxide overload in human blood suggests a toxic atmosphere in 50 years
- Cardiorespiratory fitness is associated with lower anger and anxiety
- Care homes and hotels in Japan shut as expansion strategy unravels
- Carrot Disclosure: Forgejo
- Cars collect a startling amount of data about you
- Cartoon Network Flash Games
- CasNum
- Case study: recovery of a corrupted 12 TB multi-device pool
- Cash Issuing Terminals
- Cash issuing terminals
- Castor: CERN Advanced STORage Manager
- Casus Belli Engineering
- Cat (YC S22) Seeks Fractional Engineer to Build AI-Native Growth Toolkit
- Category Theory Illustrated – Orders
- Cedana (YC S23) Is Hiring
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- Celebrating Tony Hoare's mark on computer science
- Cell Service for the Fairly Paranoid
- Ceno, browse the web without internet access
- Cessation of public development of Kefir C compiler
- Changes in the system prompt between Claude Opus 4.6 and 4.7
- Changes to OpenTTD Distribution on Steam
- Changing How We Develop Ladybird
- Chaos and Dystopian news for the dead internet survivors
- Chaosnet
- Chaosnet (1981)
- Charcuterie – Visual similarity Unicode explorer
- Charge Robotics (YC S21) Is Hiring Software and Hardware Engineers
- ChatGPT Images 2.0
- ChatGPT Pro now starts at $100/month
- ChatGPT Work
- ChatGPT for Google Sheets exfiltrates workbooks
- ChatGPT serves ads. Here's the full attribution loop
- ChatGPT won't let you type until Cloudflare reads your React state
- Chatto is now Open Source
- Cheap Iranian drone downed $25M US Army helicopter–maybe by chance
- Cheese Paper: a text editor specifically designed for writing
- Chemistry behind the Garden Grove chemical tank
- Chess Invariants
- Chest Fridge (2009)
- Chewing gum restores dad's taste and smell years after Covid
- Chibil: A C compiler targeting .NET IL
- Chicago artist creates tourism posters for city's neighborhoods
- Childhood Computing
- Chimpanzees in Uganda locked in eight-year 'civil war', say researchers
- Chimpanzees in Uganda locked in vicious 'civil war', say researchers
- China sentences official to death for taking $325M in bribes
- China's 450kmph bullet train is the fastest ever built
- Chip Off the Old Block
- Chipotlai Max
- Choosing a Public DNS Resolver
- Choosing the Right AI Agent Memory Strategy: A Decision-Tree Approach
- Chrome removes claim of On-device Al not sending data to Google Servers
- Chrome's AI features may be hogging 4GB of your computer storage
- Chuck Norris has died
- Chuwi Minibook X
- Chuwi Minibook X: the netbook we deserve
- Circle Medical (YC S15) Is Hiring a Mobile Engineer
- Circuit-level PDP-11/34 emulator
- Circular Obstacle Pathfinding (2017)
- Cirrus Labs to join OpenAI shut down Circus CI on Monday, June 1, 2026
- Cisco workforce reductions
- City Learns Flock Accessed Cameras in Children's Gymnastics Room as a Sales Demo
- Clarification on the Notepad++ Trademark Issue
- Claude Account Suspended Seconds After Purchase?
- Claude Brain
- Claude Code Cheat Sheet
- Claude Code Found a Linux Vulnerability Hidden for 23 Years
- Claude Code LSP
- Claude Code Remote Control
- Claude Code Unpacked : A visual guide
- Claude Code as a Daily Driver: Claude.md, Skills, Subagents, Plugins, and MCPs
- Claude Code conducts A/B tests on core features
- Claude Code runs Git reset –hard origin/main against project repo every 10 mins
- Claude Code sends 33k tokens before reading the prompt; OpenCode sends 7k
- Claude Code to be removed from Anthropic's Pro plan?
- Claude Code wiped our production database with a Terraform command
- Claude Code – Everything You Can Configure That the Docs Don't Tell You
- Claude Code, Claude Cowork and Codex #5
- Claude Code: Channels
- Claude Corps
- Claude Design System Prompt
- Claude Desktop spins up a VM without no way of stopping it
- Claude Fable 5
- Claude Fable 5 Promotional Access
- Claude Fable 5: mid-tier results on coding tasks
- Claude Fable is relentlessly proactive
- Claude Is Not Your Architect. Stop Letting It Pretend
- Claude Managed Agents
- Claude Opus 4.7
- Claude Opus 4.7 Model Card
- Claude Opus 4.7 costs 20–30% more per session
- Claude Platform on AWS
- Claude Science
- Claude Sonnet 5
- Claude Tag
- Claude Token Counter, now with model comparisons
- Claude Wrote a Full FreeBSD Remote Kernel RCE with Root Shell (CVE-2026-4747)
- Claude for Creative Work
- Claude for Small Business
- Claude mixes up who said what and that's not OK
- Claude now creates interactive charts, diagrams and visualizations
- Claude struggles to cope with ChatGPT exodus
- Claude system prompt bug wastes user money and bricks managed agents
- Claude's AskUserQuestion: "No response after 60s – continued without an answer"
- Claude.ai Down Again?
- Claude.ai and API Unavailable
- Claude.ai unavailable and elevated errors on the API
- Claude: Elevated errors across many models
- ClawIRC – IRC Chat for Agents
- ClawRun – Deploy and manage AI agents in seconds
- Clay PCB Tutorial
- Cleaning up after AI rockstar developers
- Cleve Moler has died
- Click (2016)
- Clockwise acquired by Salesforce and shutting down next week
- Clojure Hosted on Go
- ClojureScript Gets Async/Await
- Clojurists Together – Q2 2026 Open Source Funding Announcement
- Closure of the Weatheradio Service in Canada
- Closure of the Weatheradio service in Canada
- Closure of the Weatherradio Service in Canada
- Cloud VM benchmarks 2026
- Cloudflare Crawl Endpoint
- Cloudflare Email Service: now in public beta. Ready for your agents
- Cloudflare Flagship
- Cloudflare crawl endpoint
- Cloudflare flags archive.today as "C&C/Botnet"; no longer resolves via 1.1.1.2
- Cloudflare launched self-managed OAuth for all
- Cloudflare's AI Platform: an inference layer designed for agents
- CoMaps – FOSS Offline Maps
- Cockpit is a web-based graphical interface for servers
- Cocoa-Way – Native macOS Wayland compositor for running Linux apps seamlessly
- Codex Hacked a Samsung TV
- Codex for almost everything
- Codex just found a "workaround" of not having sudo on my PC
- Codex logging bug may write TBs to local SSDs
- Codex pricing to align with API token usage, instead of per-message
- Codex-maxxing
- Coding Agents Could Make Free Software Matter Again
- CodingFont: A game to help you pick a coding font
- Coffee with a splash of physics: how to make the most out of your brew
- Cognitive Debt: When Velocity Exceeds Comprehension
- Cohere Transcribe: Speech Recognition
- Coldkey – Post-quantum age key generation and paper backup tool
- Colibri – chat platform built on the AT Protocol for communities big and small
- CollectWise (YC F24) Is Hiring
- College instructor turns to typewriters to curb AI-written work
- College students drown out AI-praising commencement speeches with boos
- Colombia hosts talks on exiting fossil fuels as global energy crisis deepens
- Colonization of Venus
- Colorado Adds Open-Source Exemption to Age-Verification Bill
- Colorado House passes bill to limit surveillance pricing and wage setting
- Colored Shadow Penumbra
- Columnar Storage Is Normalization
- Command and Conquer Generals natively ported to macOS, iPhone, iPad using Fable
- Commission fines Temu €200M for breaching the Digital Services Act
- Commodore 64 Basic for PostgreSQL
- Common Lisp Development Tooling
- Common drug tests lead to tens of thousands wrongful arrests a year
- Communication on European Tech Sovereignty, and an EU Open-Source Strategy
- Composite Video on the NES: Why's it so wobbly?
- Composition Shouldn't be this Hard
- Compound drivers of Antarctic sea ice loss and Southern Ocean destratification
- Computational Physics (2nd Edition)
- Computer Hobby Movement in Canada
- Computer Use is 45x more expensive than structured APIs
- Computer chip material inspired by the human brain could slash AI energy use
- Computer use in Gemini 3.5 Flash
- Computer-Aided Language Development in Nonspeaking Children (1968) [pdf]
- Computer-generated dream world: Virtual reality for a 286 processor
- Computex 2026: Are We Heading for the Agentic PC Era Yet?
- Confidential submission of draft S-1 to the SEC
- Config Files That Run Code: Supply Chain Security Blindspot
- Connecticut and the 1 Kilometer Effect
- Connections in Math: the two kinds of random
- Consciousness likely not unique to earthlings, paper says
- Constraint Decay: The Fragility of LLM Agents in Back End Code Generation
- Context Sculpting
- Contextual commits – An open standard for capturing the why in Git history
- Converge (YC S23) Is Hiring a Founding Platform Engineer (NYC, Onsite)
- Conway's Game of Life, in real life
- Cook: A simple CLI for orchestrating Claude Code
- Copilot edited an ad into my PR
- Copy Fail – CVE-2026-31431
- Copy That Floppy – Cambridge guide for preserving data from fragile floppy disks
- CopyFail was not disclosed to Gentoo developer
- Core PPI up 9.6% annualized (0.8% MoM) in May
- Corgi Labs (YC W23) Is Hiring
- Corporate America Is Starting to Ration AI as Cost Skyrockets
- Correlated randomness in Slay the Spire 2
- Corruption erodes social trust more in democracies than in autocracies
- Cosmodial Sky Atlas
- Cosmology with Geometry Nodes
- Cost of enum-to-string: C++26 reflection vs. the old ways
- Costco is the anti-Amazon
- Countries are competing to see which can carry out mass surveillance the best
- Country that put backdoors in Cisco routers to spy on world bans foreign routers
- Coursera and Udemy are now one company
- Court Records Should Be Free
- Cpp2Rust: Translates C++ to safe Rust automatically
- Craig Venter has died
- Craig Venter of Human Genome Project Dies at 79
- Create an MP4 video of a web page scrolling at a steady speed
- Create value for others and don’t worry about the returns
- Creatine raise brain energy levels and slow Alzheimer's cognitive decline by 30%
- Credit cards are vulnerable to brute force kind attacks
- Croatia declared free of landmines after 31 years
- Cronboard: A terminal-based dashboard for managing cron jobs
- Cross-Model Void Convergence: GPT-5.2 and Claude Opus 4.6 Deterministic Silence
- Crypto firms have spent $189M so far on 2026 US election, report says
- Crypto in 2026: Oh, This Is the Bad Place
- Crystal Nights (2008)
- Curl will not accept vulnerability reports during July 2026
- Cursing the government does not fix potholes. Spray-painting them does
- Cursor 3
- Cursor Composer 2 is just Kimi K2.5 with RL
- CursorBench 3.1
- Customer Update on Simplenote
- Cutting inference cold starts by 40x with LP, FUSE, C/R, and CUDA-checkpoint
- Cyber.mil serving file downloads using TLS certificate which expired 3 days ago
- Cyberattack on vehicle breathalyzer company leaves drivers stranded in the US
- Cyberpunk Comics, Manga and Graphic Novels
- DARPA Heavy Life Challenge
- DARPA's new X-76 Experimental Plane
- DHS Contracts Explorer – Hacked data from the Office of Industry Partnership
- DHS Quits Granting Green Cards–Almost
- DIY Soft Drinks
- DLL that was not present in memory despite not being formally unloaded
- DMCA-resistant Claude Code source code
- DNI Gabbard Reveals Evidence of U.S. Taxpayer-Funded Global Biolab Program
- DNSGlobe – Rust TUI to watch DNS propagate around the world
- DOJ confirms FBI Director Kash Patel's personal email was hacked
- DOS Memory Management
- DOS Zone
- DRAM pricing is killing the hobbyist SBC market