Software update: Racket 8.5

Racket is a development language with which other development languages ​​can be developed. In addition, you can simply develop in Racket itself. It was previously known as the PLT Scheme and comes from the Lisp-Scheme family. For the background we refer to the manifest, written under the direction of Matthias Felleisen. The developers have released version 8.5 of Racket with the following changes:

Racket v8.5

As of this release:

• Racket’s new -y flag automatically keeps compiled files up to date, reducing subsequent load times.
• Error-message realms allow Racket-hosted languages ​​to adapt and rewrite error messages to make sense in a particular context.
• Nonprivileged users can control package installation scope using an “other-version” directory in the addon-dir.
• Racket CS runs on platforms where native-code generation is not currently supported (eg, s390x or ppc64). See “README.txt” in the source distribution for more information on the —enable-pb flag to configure.
• DrRacket’s new ‘Reopen Closed Tab’ file menu item will open previously closed tabs.
• Typed Racket has support for the xml library; use typed/xml.
• Rackunit reports source locations for failed test cases in the Typed Racket language.
• Plot has violin plots and improved box-and-whisker plots.
• Boxes are supported alongside lists, vectors etc. in place-channel messages.
• Those who manually configure Racket CS to use Zlib compression for compiled code should be aware of CVE–2018–25032; the next release and the current snapshot builds use a newer, safer version of zlib.

The release includes many other repairs and changes!