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Scala 2.11.11: all the way to eleven!

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@adriaanm adriaanm released this 18 Apr 14:32

The 2.11.11 release concludes the 2.11.x series, with no further releases planned. Please consider upgrading to 2.12!

Do not use 2.11.9 or 2.11.10, which introduced significant regressions (see below). This also means this series goes to eleven. (No further, though.)


Significant changes since 2.11.8 include:

  • #5730, #5846 Allow custom apply and unapply methods in case class companions. Also allows case class constructors and apply methods to be private. (In 2.11.11, -Xsource:2.12 is needed to enable these changes. In Scala 2.12.2, they are on by default.)
  • #5343 Add support for higher order unification under -Ypartial-unification (SI-2712)
  • #5341 Fix for higher-kinded GADT refinement
  • #5061 JMH-based benchmark framework for contributors
  • #5026 Upgrade to newer scala-xml (1.0.5)

2.11.11 resolves regressions introduced in 2.11.9 and 2.11.10: #5730 (fixed by #5828 and #5846), #5664 (fixed by #5821). Special thanks to @xuwei-k and @sjrd for reporting and helping diagnose these.

For more information, check out all closed bugs and merged PRs.

As usual for minor releases, Scala 2.11.11 is binary compatible with the whole Scala 2.11 series (with the exception of 2.11.9, which should not be used to publish artifacts, see #5821).

To share your feedback on this release, please use our new GitHub-based bug tracker and Discourse-based contributors forum.


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.

This release was brought to you by 33 contributors, according to git shortlog -sn --no-merges v2.11.8..v2.11.11. Thank you Adriaan Moors, A. P. Marki, Jason Zaugg, Seth Tisue, Lukas Rytz, Performant Data LLC, Stefan Zeiger, Pap Lőrinc, Iulian Dragos, Rory Graves, Miles Sabin, Martijn Hoekstra, Mike Skells, Sébastien Doeraene, Dale Wijnand, Raphael Jolly, ptrcarta, Łukasz Gieroń, Carsten Varming, CodingTwinky, Jasper-M, Johannes Rudolph, Krzysztof Romanowski, Martynas Mickevičius, Masaru Nomura, Nicolas Stucki, Oscar Boykin, Paul Kernfeld, Philippus Baalman, Tobias Schlatter, Viktor Klang, af, and jvican!

Scala 2.11 Notes

The release notes for Scala 2.11.0 have important information applicable to the whole 2.11 series.

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