---
draft: false
authors:
  - mwahl
description: "Last week's Pony news, Christmas Edition."
categories:
  - "Last Week in Pony"
title: "Last Week in Pony - December 24, 2017"
date: 2017-12-24T00:00:00+01:00
---
_Last Week In Pony_ is a weekly blog post to catch you up on the latest news for the Pony programming language. To learn more about Pony check out [our website](https://ponylang.io), our Twitter account [@ponylang](https://twitter.com/ponylang), or our [Zulip community](https://ponylang.zulipchat.com).

Got something you think should be featured? There's a GitHub issue for that! Add a comment to the [open "Last Week in Pony" issue](https://github.com/ponylang/ponylang.github.io/issues?q=is%3Aissue+is%3Aopen+label%3Alast-week-in-pony).
<!-- more -->

## Pony 0.21.0 released

***Merry Christmas everybody!***

We managed to slip the new Release [0.21.0](https://github.com/ponylang/ponyc/releases/tag/0.21.0) of Ponyc into your Christmas stocking.

This is one of the biggest releases so far, containing tons of bug fixes, some really sweet additions and even some breaking changes. So unwrapping ... errr ... updating is highly recommended. But the greatest feature of them all in this release is definitely the [Generalised Runtime Backpressure](https://stdlib.ponylang.io/backpressure--index).

The [Release Blog Post](https://github.com/ponylang/ponyc/releases/tag/0.21.0) contains all the gory details.

## Items of note

- [Ponycheck](https://github.com/mfelsche/ponycheck) [0.2.0](https://github.com/mfelsche/ponycheck/releases/tag/0.2.0) has been released. Ponycheck is a library for property based testing for Pony. With this release Ponycheck supports compositional shrinking. If you ask yourself what the heck that means (like me), check out the [Release Notes](https://github.com/mfelsche/ponycheck/releases/tag/0.2.0)

- Another Week, another Pony Development Sync Call. Those calls are public and if you'd like to join and bring up a burning topic, just We'd love to have you on board to discuss your issues and/or ideas. Here is the [Recorded Audio for last weeks Call](https://vimeo.com/915356196).

## RFCs

Interested in making a change, or keeping up with changes to Pony? Check out the [RFC repo](https://github.com/ponylang/rfcs). Contributors welcome!
