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Pi 1.0

https://earendil.com/posts/pi-1-0/
674•sergiotapia•4h ago•223 comments

Clef: Open-weight decision models, and new RL fine-tuning platform

https://blog.cloudflare.com/clef-decision-models/
406•jasondavies•8h ago•156 comments

SvelteKit 3

https://svelte.dev/blog/sveltekit-3-is-here
91•sampsn•4h ago•29 comments

Several vulnerabilities have been discovered in the Linux kernel

https://lwn.net/Articles/1097401/
19•luispa•1h ago•4 comments

Ask HN: Who is hiring? (October 2026)

141•whoishiring•9h ago•146 comments

Show HN: Janus – Go binary that runs GGUF models via Vulkan on AMD/Intel/Nvidia

https://github.com/Vibra-Ingenn/Janus
44•Maverick617•3h ago•5 comments

CSS Bed: Classless CSS themes to use as starting points in web development

https://www.cssbed.com
45•sea-gold•2h ago•9 comments

Pi Durable

https://earendil.com/posts/pi-durable/
195•paulsmith•4h ago•21 comments

StreetComplete on iOS is now in public beta

https://github.com/streetcomplete/StreetComplete/issues/5421
512•Snowly•13h ago•123 comments

Using Opus 5.5 to discover a new eyewitness record of the dodo

https://resobscura.substack.com/p/using-opus-55-to-discover-a-new-eyewitness
43•benbreen•3h ago•2 comments

RIP, vector database

https://turbopuffer.com/blog/rip-vector-database
264•razin•8h ago•76 comments

ArXiv's Updated Rate Limit Policy

https://blog.arxiv.org/2026/10/01/updated-rate-limit-policy/
61•50kIters•4h ago•19 comments

Git 3.0's upcoming SHA-256 default will be a costly mistake

https://blog.gitbutler.com/git-3-sha-256
185•chmaynard•7h ago•207 comments

Oxygen-deprived underwater zones may not be “dead zones” but clue to early life

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2026AV002570
73•gumby•5h ago•3 comments

Automatic Transmission – a data-privacy study of connected vehicles

https://automatictransmission.khoury.northeastern.edu/index.html
134•rafaelc•3h ago•130 comments

Aweb – Communication for AI Agents

https://aweb.ai
12•gurjeet•2h ago•6 comments

Vote on which of Hacker News' challenges for AI have been met

https://stoppels.ch/goalposts/
76•stabbles•6h ago•74 comments

Apple's smart home camera reportedly won't record video

https://www.theapplepost.com/2026/10/01/72882/apples-smart-home-camera-reportedly-wont-record-video/
8•mikelgan•1h ago•7 comments

Various Projects Find Hidden SDR Capabilities in ESP32 Microcontrollers

https://www.rtl-sdr.com/various-projects-independently-find-hidden-sdr-capabilities-in-esp32-micr...
157•nkw•9h ago•25 comments

Cloudflare K2: serverless event streams

https://blog.cloudflare.com/cloudflare-k2-streams/
189•elffjs•10h ago•78 comments

Bez: Generating a browser engine from specs and tests

https://tangled.org/burrito.space/bez
83•nerdypepper•6h ago•32 comments

Show HN: Open-source model routing for coding agents at Astra-level performance

74•adchurch•1d ago•21 comments

RacketCon Is Saturday

https://con.racket-lang.org/
121•spdegabrielle•9h ago•33 comments

2026 International Utility Locate Rodeo

https://locaterodeo.net/
8•K7PJP•1h ago•0 comments

The death of web development education

https://molily.de/web-dev-education/
142•ibobev•3h ago•110 comments

Context Language Models

https://arxiv.org/abs/2609.37725
100•emersonmacro•9h ago•25 comments

Ask HN: Who wants to be hired? (October 2026)

86•whoishiring•9h ago•266 comments

How to speed up the Rust compiler in September 2026

https://nnethercote.github.io/2026/09/30/how-to-speed-up-the-rust-compiler-in-september-2026.html
226•trickypr•11h ago•114 comments

Your Big Mac might cost more if McDonald's AI thinks people nearby can afford it

https://neow.in/NGxhb3d6
6•bundie•2h ago•1 comments

Butterflies use optical illusions to dodge predators

https://www.essex.ac.uk/news/2026/09/30/butterflies-use-optical-illusions-to-dodge-predators
5•gmays•1h ago•0 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.