Preparing releasing 0.42.1. No code changes. (0.42.1)

web/_posts/2026-06-09-announcing-fun-0.42.1.md

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+---
+layout: post
+published: true
+author: hanez
+author_email: you@hanez.org
+author_url: https://hanez.org
+noToc: false
+title: Announcing Fun 0.42.1
+description: Maintenance release with documentation updates and a small test script fix
+date: 2026-06-09
+categories:
+- news
+- releases
+tags:
+- fun
+- release
+- docs
+- redis
+---
+
+We just released Fun 0.42.1. This is a small, safe maintenance update you can adopt immediately.
+
+### What’s in 0.42.1
+
+- Fixed: Small test script issue.
+- Changed: Documentation and website updates. No runtime code changes.
+- Changed: README, `make`, and `Doxyfile` updates. No runtime code changes.
+
+If you’re already on 0.42.0, this update has no behavioral impact on your programs.
+
+### Recap: Highlights from 0.42.0
+
+In case you missed the previous release, 0.42.0 introduced the optional Redis/Valkey extension powered by `hiredis`, along with example programs and docs.
+
+- New extension: `redis` (connect, cmd, close)
+- Examples: `basic_ping.fun`, `hash_ops.fun`, `kv_set_get.fun`, `list_ops.fun`, `redis_test.fun`
+- Docs: see Documentation → Extensions → Redis
+
+To enable the Redis extension when building Fun, pass the CMake option `-DFUN_WITH_REDIS=ON` (ensure `hiredis` is installed and visible to the toolchain). See the build guide for details.
+
+Example (Release build directory shown by your setup):
+
+```
+cmake -S . -B build_release -DFUN_WITH_REDIS=ON
+cmake --build build_release --target fun
+```
+
+### Changelog
+
+For the complete list of changes and dates, see the project’s [CHANGELOG.md](https://git.xw3.org/fun/fun/src/branch/main/CHANGELOG.md){:class="git"} in the repository.
+
+### Thank you
+
+Thanks to everyone testing, filing issues, and contributing examples and docs. If you want to help, check out the repository, read the docs, and say hi in the community.
+
+Happy hacking!
+
+Johannes Findeisen (hanez) — hanez@fun-lang.xyz