frontpage.
newsnewestaskshowjobs

Open Source @Github

fp.

HackerTube: YouTube built from videos recommended by HN

https://karpathy.bearblog.dev/hacker-tube/
1309•karpathy•14h ago•368 comments

Japan's trains are great. Why is booking one so hard?

https://vinibrasil.com/japan-train/
16•vnbrs•1h ago•20 comments

An Italian farmer found some unknown seeds in his attic and planted them

https://www.smithsonianmag.com/science-nature/italian-farmer-found-unknown-seeds-attic-with-nothi...
439•ecares•11h ago•125 comments

The AI cost of JavaScript frameworks

https://nolanlawson.com/2026/10/28/the-ai-cost-of-javascript-frameworks/
70•luu•3h ago•36 comments

Running a bootstrapped SaaS for 20 years with my brother

https://blog.zamzar.com/2026/10/30/20-years-766-million-files-two-chameleons/
85•whyleyc•1d ago•23 comments

Brazilian Court Sanctions Lawyers for Prompt Injection in Court Filing

https://jetstream.security/insights/brazilian-court-sanctions-prompt-injection-filing/
119•doodlesdev•7h ago•50 comments

No AI, 52 min. Build all Linux Files utils in C by Hand [video]

https://www.youtube.com/watch?v=gQRmSlcTq9c
12•surprisetalk•2d ago•3 comments

TCP Use-After-Free: CVE-2026-98432 / CVSS 9.8

https://atlasum.net/blog/cve-2026-98432-linux-ipv4-tcp-uaf
505•oger•14h ago•234 comments

Memdoor: A team of 5 Qwen3.8-27B models beats Fable 5 on LiveCodeBench Hard

https://github.com/guregodevo/memdoor/tree/main/examples/workflows/team-solve
229•guregodevo•11h ago•111 comments

Leaking Secrets from Air-Gap Computers by Spelling Radio Signals from RAM (2024)

https://arxiv.org/abs/2409.02292
87•hapax_legomena•8h ago•40 comments

OpenIDEA: The IDE you know, rebuilt in Rust

https://github.com/l0ng-ai/openidea
5•theanonymousone•47m ago•1 comments

Pac-Man's Siren Call

https://unsung.aresluna.org/pac-mans-siren-call/
20•tobr•3h ago•6 comments

Zinc creep in cable spelter sockets brought down the Arecibo telescope in 2020

https://maketecheasier.com/arecibo-zinc-creep-collapse/
112•ohjeez•1d ago•27 comments

ChatGPT and Codex usage limits merging

https://help.openai.com/en/articles/20001625-understanding-chatgpt-and-codex-usage-limits
123•Zariel•12h ago•60 comments

Pilot-wave hydrodynamics (Quantum phenomena in macroscopic hydrodynamic systems)

http://thales.mit.edu/bush/index.php/4801-2/
38•peter_d_sherman•1d ago•6 comments

Altoids Project

https://uvdn7.github.io/altoids-project/
110•uvdn7•11h ago•5 comments

It's the memory latency, stupid

https://pivotlake.io/blog/its-the-memory-latency-stupid/
195•ntur1337•15h ago•60 comments

A 1580 Map Shows Why Data Visualization Is Never Neutral

https://thereader.mitpress.mit.edu/a-1580-map-shows-why-data-visualization-is-never-neutral/
41•the-mitr•1d ago•2 comments

A brief history of just-in-time: forty years of JIT work, from 1960–2000

https://dl.acm.org/doi/10.1145/857076.857077
26•gjvc•2d ago•0 comments

Electrification Could Cut Global Energy Use in Half

https://fullycharged.show/podcasts/podcast-361-why-electrification-could-cut-global-energy-use-in...
107•toomuchtodo•14h ago•46 comments

Jepsen: ParticleDB 1.1.4

https://jepsen.io/analyses/particledb-1.1.4
264•aphyr•20h ago•150 comments

Surviving "The Graduate"

https://www.newyorker.com/culture/the-weekend-essay/dustin-hoffman-on-surviving-the-graduate
116•samizdis•14h ago•35 comments

Understanding Email Encryption

https://www.fastmail.com/blog/email-encryption/
10•nmjenkins•1d ago•3 comments

Do the math: How we took over ChatGPT accounts

https://www.parameter.ai/labs/we-found-a-gap-at-openai
330•armcat•23h ago•165 comments

Edgar Allan Poe, Quintessential American Writer

https://slate.com/culture/2026/10/edgar-allan-poe-poems-stories-most-influential-american-writer-...
32•samclemens•3d ago•1 comments

Simple circuits can create complex behaviors

https://aatishb.com/myriad/lets-build-a-brain/
251•aatish•4d ago•78 comments

The Duty of a Scholar

https://www.daemonology.net/blog/2026-10-31-The-Duty-of-a-Scholar.html
118•gslin•14h ago•32 comments

Anthropic blocks users for anything touching training larger models

https://twitter.com/jiahaoshao1/status/2116475922190922088
350•pretext•14h ago•205 comments

Show HN: BBRouter – Ben Eater's 8-bit computer, simulated on 3D breadboards

https://bbrouter.com/bbrouter/ben-eater-sap-1
30•creack•9h ago•8 comments

Reading and writing are less symmetric than you (probably) think

https://fgiesen.wordpress.com/2015/10/25/reading-and-writing-are-less-symmetric-than-you-probably...
112•luu•4d ago•26 comments
Open in hackernews

Fixrleak: Fixing Java Resource Leaks with GenAI

https://www.uber.com/blog/fixrleak-fixing-java-resource-leaks-with-genai/
17•carimura•1y ago

Comments

stevoski•1y ago
> “Resource leaks, where resources like files, database connections, or streams aren’t properly released after use, are a persistent issue in Java applications”

This was true maybe back in 2005. Java has had try-with-resources for a loooong time. As I see it this has been the dominant idiom for ages, for handling resources that might leak.

okr•1y ago
People tend to forget. Stream-API is a good candidate, that people like to not consider for leakage. If you don't own your stream, if you do not definitly know, that your stream comes from a collection, then ya better close it with a try-block.
bob778•1y ago
How much effort was spent automating this to fix 112 instances across Uber’s code base? I assume code reviews would catch any new issues so this seems like overkill for a small one-off task?
hawk_•1y ago
Spotbugs or checkstyle etc... would catch these. What does AI add here?
xyst•1y ago
It gives marketing team at Uber to say "wE uSe AI hErE!!1". C-levels approve since anything AI gets a nice pump.

Engineering wise. This adds nothing. It’s an absolute waste of compute and energy to run this through LLMs

sigotirandolas•1y ago
> This analysis ensures that FixrLeak skips functions where resources are passed as parameters, returned, or stored in fields, as these resources often outlive the function’s scope.

> FixrLeak delivers precise, reliable fixes while leaving more complex cases for advanced analysis at the caller level.

In other words, this will only fix trivial leaks, which are best seen as a language design issue and can be fixed by RAII, reference counting, etc.

It won't fix the more insidious leaks like `UNBOUNDED_QUEUE.add(item)` that are more likely to pass through code review in the first place.

xyst•1y ago
Using AI when a static scanner like SonarQube easily picks up these types of resource leaks, especially in Java.

Peak waste.

What’s next?

"Get rid of your GitHub dependabot alerts and replace it with my shitty ChatGPT wrapper”

rvz•1y ago
> Using AI when a static scanner like SonarQube easily picks up these types of resource leaks, especially in Java.

Exactly.

It's very disappointing to see that Uber engineers would rather trust an LLM to that claims to spot these issues when a battle-tested scanner such as SonarQube would have caught this in the first place.

The LLM hype-train is almost just as bad as the JavaScript hype train in the 2010s where some of the worst technologies are used on everything.

rvz•1y ago
Why exactly do you need LLMs for this when efficient alternatives like SonarQube or checkstyle already do this without the expensive waste LLMs create?

This adds little to no technical advantage over existing solutions what so ever for this particular use case.

yahoozoo•1y ago
stupid af
Traubenfuchs•1y ago
So you tell me those 200-600k software engineers that can easily solve leetcode hard are so incompetent they missed using try-with-resources at such scale, they needed to introduce new AI tooling to fix it?

Hey Uber, I am from the EU, I usually can‘t even solve leetcode medium but I will write you scalable, spotless Java for a third of the salary.

Our industry and its economics are a joke.

hello_moto•1y ago
So you write bug-free scalable code 100% in any jobs you ever worked for?

I guess we don’t need QA and Dev/Staging environment

rad_gruchalski•1y ago
Can the QA team? How does the dev/staging environment help writing less buggy code?
rad_gruchalski•1y ago
But can you leetcode heh.
TYMorningCoffee•1y ago
A lot of commenters point out that there already are many established static checkers that do this. That is not what Uber attempts here.

Uber is not proposing a static checker. They even use sonar qube in their architecture. They propose using an LLM to resolve the leak detected by sonar qube.