Scala 2.12.20 release planning

SethTisue · February 26, 2024, 10:10pm

This thread is for updates and discussions about the eventual Scala 2.12.20 release.

As of yet, we don’t know anything about the release’s likely timing or contents.

We can use this thread to ask, propose, discuss.

SethTisue · August 8, 2024, 7:58pm

It would be good to ship 2.12.20 at around the same time we ship 2.13.15, to ship JDK 23 support in the optimizer.

(2.13.15 thread)

SethTisue · August 14, 2024, 7:29pm

Everything merged, 2.12.20 milestone closed. I’ll post draft release notes after we have green community build runs.

SethTisue · August 19, 2024, 4:21pm

There are no more open 2.12.x PRs. The 2.12 community build is green, including on JDK 23.

2.12.20 release candidate is: 2.12.20-bin-13f19f4 (to use, see How do I use a nightly build of Scala? - Stack Overflow)

PRs with “release-notes” label: Pull requests · scala/scala · GitHub

Please test! We’ll release it as soon as 2.13.15 is also ready.

SethTisue · August 19, 2024, 6:44pm

draft release notes. feedback welcome (on the PR)

github.com

SethTisue/scala-dev/blob/scala-2.12.20/2.12.20.md

# Scala 2.12.20 (DRAFT)

This release improves **compatibility**:

* Support JDK 23 in optimizer (via upgrade to patched ASM 9.7.0) ([#10747](https://github.com/scala/scala/pull/10747) by [@Philippus](https://github.com/Philippus))
* Bump scala-xml dependency to 2.3.0 (was 2.2.0) ([#10782](https://github.com/scala/scala/pull/10782))

and **compiler profiling**:

* [backport] Collect statistics without printing them ([#10798](https://github.com/scala/scala/pull/10798) by [@szeiger](https://github.com/szeiger))

For complete 2.12.20 change lists, see [all merged PRs](https://github.com/scala/scala/pulls?q=is%3Amerged%20milestone%3A2.12.20) and [all closed bugs](https://github.com/scala/bug/issues?utf8=%E2%9C%93&q=is%3Aclosed+milestone%3A2.12.20).

## Compatibility

As usual for our minor releases, Scala 2.12.20 is [binary-compatible](https://docs.scala-lang.org/overviews/core/binary-compatibility-of-scala-releases.html) with the whole Scala 2.12 series.

## Contributors

A big thank you to everyone who's helped improve Scala by reporting bugs, improving our documentation, spreading kindness in discussions around Scala, and submitting and reviewing pull requests! You are all magnificent.

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SethTisue · August 22, 2024, 12:56am

We will publish the final releases (2.13.15 and 2.12.20) to Maven Central no sooner than Mon Sep 2, and then fully announce no sooner than Wed Sep 4.

sjrd · September 2, 2024, 10:02am

Better late than never, I successfully tested Scala.js 1.16.0 with the candidate for 2.12.20.

SethTisue · September 2, 2024, 3:43pm

2.12.20 JARs are now on Maven Central.

Tooling and compiler plugin maintainer powers, activate! Please publish support.

We won’t announce before Wednesday, September 4, 2024.

(If you need a little more time, e.g. because of the Labor Day holiday in the USA, don’t hesitate to ask.)

sjrd · September 2, 2024, 4:05pm

Scala.js 1.16.0 support for 2.12.20 is on its way to Maven Central.

I can back-publish older releases upon request.

lrytz · September 3, 2024, 11:23am

Macro paradise (version 2.1.1) for 2.12.20 is now on Maven Central.

WojciechMazur · September 3, 2024, 2:40pm

Scala Native 0.4.17 and 0.5.0 … 0.5.5 artifacts are on the way to Maven Central

SethTisue · September 4, 2024, 3:50pm

We’re done!

Thanks to everyone who participated in this modest release. With luck, 2.13.15 will follow next week.

SethTisue · September 4, 2024, 3:54pm

scoverage is available now, too (thanks Chris Kipp!)