chore(deps): update dependency scala to v2.13.12 - #344

v2.13.12: Scala 2.13.12

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The Scala team at Lightbend is pleased to announce Scala 2.13.12.

The following changes are highlights of this release:

Feature: Quickfixes

For some errors and warnings, the compiler now suggests an edit that could fix the issue. Tooling such as IDEs can then offer the edits, or the compiler itself will make the change if run again with -quickfix.

• Implement quickfixes, aka actionable diagnostics (via CodeAction) (#​10406 by @​eed3si9n)
• Add -quickfix compiler option to apply quickfixes to source files (#​10482 by @​lrytz)
• Add quickfixes to some warnings and errors (#​10484 by @​lrytz)

Align with Scala 3

• Emit migration warnings under -Xsource:3 as fatal warnings, not errors (#​10439 by @​som-snytt, #​10511)
  • -Xmigration will demote the errors to warnings
  • -Wconf:cat=scala3-migration:s will silence these errors/warnings altogether
• Warn about @elidable under -Xsource:3 (#​10377 by @​som-snytt)

Collections

• IndexedSeq#head now throws NoSuchElementException (not IndexOutOfBoundsException) (#​10392 by @​som-snytt)

Regression fixes

• Deduplicate JavaDeprecatedAttr in ClassfileParser (#​10422 by @​som-snytt)
• Avoid brittle flags encoding for Java enums (#​10424 by @​som-snytt)

Scaladoc tool changes

Library authors should be aware that the behavior of -doc-source-url has changed, as follows:

• https://github.com/scala/bug/issues/12867

You may need to adjust your build accordingly, to avoid generating broken source links.

Tooling

The following change is mainly of concern to tooling maintainers.

• In-source sbt compiler bridge (#​10472 by @​lrytz)

Other notable changes

For the complete 2.13.12 change lists, see all merged PRs and all closed bugs.

Compatibility

As usual for our minor releases, Scala 2.13.12 is binary-compatible with the whole Scala 2.13 series.

Upgrading from 2.12? Enable -Xmigration while upgrading to request migration advice from the compiler.

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.

We especially acknowledge and thank A. P. Marki, also known as Som Snytt, who is responsible for a large share of the improvements in this release.

This release was brought to you by 12 contributors, according to git shortlog -sn --no-merges @​ ^v2.13.11 ^2.12.x ^366ba2f. Thank you A. P. Marki, Lukas Rytz, Seth Tisue, Scala Steward, Michel Davit, Nicolas Stucki, Alex Leigh, Eugene Yokota, Georgi Krastev, Jamie Willis, Julien Richard-Foy, NthPortal.

Thanks to Lightbend for their continued sponsorship of the Scala 2 team’s efforts. Lightbend offers commercial support for Scala.

Scala 2.13 notes

The release notes for Scala 2.13.0 have important information applicable to the whole 2.13 series.

Obtaining Scala

Scala releases are available through a variety of channels, including (but not limited to):

• Bump the using scala setting in your Scala CLI project
• Bump the scalaVersion setting in your sbt or Mill project
• Download a distribution from scala-lang.org
• Obtain JARs via Maven Central

v2.13.11: Scala 2.13.11

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The Scala team at Lightbend is pleased to announce Scala 2.13.11.

The following changes are highlights of this release:

Collections

• Faster Vector concatenation (#​10159 by @​ansvonwa)
• New LinkedHashMap/LinkedHashSet implementation (#​10221 by @​liang3zy22)

Compatibility

• Support JDK 20 and 21 by upgrading to ASM 9.5 (#​10363, #​10184 by @​Philippus)
• Fix crash reading JDK 21 classfiles (#​10397)
• Support Java 17 sealed in Java sources and classfiles (#​10348, #​10105 by @​som-snytt)
• Support Scala 3.3 in TASTy reader (#​10299 by @​bishabosha)

Align with Scala 3

• Accept implicit _, implicit (x: Int) in lambdas, like Scala 3 does (#​10327 by @​som-snytt)
• Deprecate infix type args, as they are dropped in Scala 3 (#​10255 by @​som-snytt)
• Allow eta-expansion of methods with dependent types (#​10166)
• Abstract parent copy does not suspend case copy (#​10085 by @​som-snytt)
• Don't GLB binders of type patterns, use the type directly (#​10247)
• Under -Xsource:3, warn that inherited members no longer take precedence over outer definitions in Scala 3 (#​10220, #​10339)
• Under -Xsource:3, adjust 2.13.9 change to ignore override type for whitebox macro expansion (#​10188 by @​som-snytt)
• Under -Xsource:3, use narrowest type for pt of override (#​10198 by @​som-snytt)
• Under -Xsource:3, warn about change to parenless lambda parens (#​10320 by @​som-snytt)

Lints and warnings

• Lint select from Unit, or Int that incurs widening (#​10372 by @​som-snytt)
• Lint for integral divisions that are widened to a float (#​10369 by @​som-snytt)
• Lint if args adapted to Unit and discarded (#​10150 by @​som-snytt)
• Warn that implicit should have explicit type (#​10083 by @​som-snytt)

Other notable changes

• Disallow mixins where super calls bind to vals (#​10268)
• Make scalac's argument-file processing more like javac's in handling spaces and line breaks (#​10319 by @​som-snytt)
• Bump JLine and JNA versions (#​10318)
• javabootclasspath supersedes jrt (#​10336 by @​som-snytt)
• Report total errors on stderr (#​10272 by @​som-snytt)
• Fix pathologically slow compilation of some pattern matches since 2.13.7 (#​10258 by @​KisaragiEffective)
• Provide equals and hashCode on IterableWrapper again (fixing 2.13.9 regression) (#​10205 by @​som-snytt)
• Improvements to -Vimplicits; errors now show complete implicit search tree (#​9944 by @​tribbloid)
• -Vprint defaults to -Vprint:typer; phases may be prefixed with ~ to mean "before and after" (#​10173 by @​som-snytt)

2.13.11 also includes the changes from Scala 2.12.18. (A few of the most significant, such as those involving JDK 20 and 21 compatibility, are listed above.)

For the complete 2.13.11 change lists, see all merged PRs and all closed bugs.

Known issues

A few regressions have been discovered:

• Exhaustivity checker emits spurious warning when matching on Java enum type (2.13.11 regression) (scala/bug#12800)
• Duplicated @Deprecated annotations when extending Java interface with deprecated default method cause java.lang.annotation.AnnotationFormatError when accessed via Java reflection (2.13.11 regression) (scala/bug#12799)

We'll address these in Scala 2.13.12.

Compatibility

As usual for our minor releases, Scala 2.13.11 is binary-compatible with the whole Scala 2.13 series.

Upgrading from 2.12? Enable -Xmigration while upgrading to request migration advice from the compiler.

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.

We especially acknowledge and thank A. P. Marki, also known as Som Snytt, who is responsible for a large share of the improvements in this release.

This release was brought to you by 28 contributors, according to git shortlog -sn --no-merges @​ ^v2.13.10 ^2.12.x. Thank you A. P. Marki, Lukas Rytz, Seth Tisue, Anselm von Wangenheim, Scala Steward, Liang Yan, Jamie Thompson, jxnu-liguobin, AminMal, Jason Zaugg, Kenji Yoshida, Rituraj, ashish, Chris Kipp, Dale Wijnand, Francesco Kriegel, Georgi Chochov, Goooler, João Costa, Kisaragi Marine, Rafał Sumisławski, Ruslans Tarasovs, Simon R, Sébastien Doeraene, Tomasz Godzik, Zhang Zhipeng, danarmak, hepin.p.

Thanks to Lightbend for their continued sponsorship of the Scala 2 team’s efforts. Lightbend offers commercial support for Scala.

Scala 2.13 notes

The release notes for Scala 2.13.0 have important information applicable to the whole 2.13 series.

Obtaining Scala

Scala releases are available through a variety of channels, including (but not limited to):

• Bump the scalaVersion setting in your sbt project
• Bump the using scala setting in your Scala-CLI project
• Download a distribution from scala-lang.org
• Obtain JARs via Maven Central

v2.13.10: Scala 2.13.10

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The Scala team at Lightbend is pleased to announce the availability of Scala 2.13.10.

The following changes are highlights of this release:

Binary compatibility regression fixed

• Fix 2.13.9 regression which broke binary compatibility of case classes which are also value classes (#​10155)

Library maintainers should avoid publishing libraries using Scala 2.13.9.

Other notable changes

• Fix 2.13.9 regression in linting, causing spurious "variable x is never used" warnings (#​10154)
• -Xsource:3 now respects refinements by whitebox macro overrides (#​10160 by @​som-snytt)
• Scaladoc tool: fix parsing bug which could cause very slow performance or incorrect output (#​10175 by @​liang3zy22)
• Restore -Vprint-args, for echoing arguments provided to compiler (#​10164 by @​som-snytt)

For the complete 2.13.10 change lists, see all merged PRs and all closed bugs.

Compatibility

As usual for our minor releases, Scala 2.13.10 is binary-compatible with the whole Scala 2.13 series.

Upgrading from 2.12? Enable -Xmigration while upgrading to request migration advice from the compiler.

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.

We especially acknowledge and thank A. P. Marki, also known as Som Snytt, who is responsible for an especially large share of the improvements in this release.

This release was brought to you by 6 contributors, according to git shortlog -sn --no-merges @​ ^v2.13.9 ^2.12.x. Thank you A. P. Marki, Liang Yan, Seth Tisue, Antoine Parent, Luc Henninger, 梦境迷离.

Thanks to Lightbend for their continued sponsorship of the Scala core team’s efforts. Lightbend offers commercial support for Scala.

Scala 2.13 notes

The release notes for Scala 2.13.0 have important information applicable to the whole 2.13 series.

Obtaining Scala

Scala releases are available through a variety of channels, including (but not limited to):

• Bump the scalaVersion setting in your sbt-based project
• Download a distribution from scala-lang.org
• Obtain JARs via Maven Central

v2.13.9: Scala 2.13.9

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The following changes are highlights of this release:

Regression

Library maintainers should avoid publishing libraries using Scala 2.13.9. Please use 2.13.10 instead. 2.13.9 has a regression where binary-incompatible bytecode is emitted for case classes which are also value classes (case class ... extends AnyVal).

Compatibility with Scala 3

• Tasty Reader: Add support for Scala 3.2 (#​10068)
• Tasty Reader: Restrict access to experimental definitions (#​10020)
• To aid cross-building, accept and ignore using in method calls (#​10064 by @​som-snytt)
• To aid cross-building, allow ? as a wildcard even without -Xsource:3 (#​9990)
• Make Scala-3-style implicit resolution explicitly opt-in rather than bundled in -Xsource:3 (#​10012 by @​povder)
• Prefer type of overridden member when inferring (under -Xsource:3) (#​9891 by @​som-snytt)

JDK version support

• Make -release more useful, deprecate -target, align with Scala 3 (#​9982 by @​som-snytt)
• Support JDK 19 (#​10001 by @​Philippus)

Warnings and lints

• Add -Wnonunit-statement to warn about discarded values in statement position (#​9893 by @​som-snytt)
• Make unused-import warnings easier to silence (support filtering by origin=) (#​9939 by @​som-snytt)
• Add -Wperformance lints for *Ref boxing and nonlocal return (#​9889 by @​som-snytt)

Language improvements

• Improve support for Unicode supplementary characters in identifiers and string interpolation (#​9805 by @​som-snytt)

Compiler options

• Use subcolon args to simplify optimizer options (#​9810 by @​som-snytt)
• For troubleshooting compiler, add -Vdebug-type-error (and remove -Yissue-debug) (#​9824 by @​tribbloid)

Security

• Error on source files with Unicode directional formatting characters (#​10017)
• Prevent Function0 execution during LazyList deserialization (#​10118)

Bugfixes

• Emit all bridge methods non-final (perhaps affecting serialization compat) (#​9976)
• Fix null-pointer regression in Vector#prependedAll and Vector#appendedAll (#​9983)
• Improve concurrent behavior of Java ConcurrentMap wrapper
  (#​10027 by @​igabaydulin)
• Preserve null policy in wrapped Java Maps (#​10129 by @​som-snytt)

Changes that shipped in Scala 2.12.16 and 2.12.17 are also included in this release.

For the complete 2.13.9 change lists, see all merged PRs and all closed bugs.

Compatibility

As usual for our minor releases, Scala 2.13.9 is binary-compatible with the whole Scala 2.13 series.

Upgrading from 2.12? Enable -Xmigration while upgrading to request migration advice from the compiler.

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.

We especially acknowledge and thank A. P. Marki, also known as Som Snytt, who is responsible for an especially large share of the improvements in this release.

This release was brought to you by 27 contributors, according to git shortlog -sn --no-merges @​ ^v2.13.8 ^2.12.x. Thank you A. P. Marki, Lukas Rytz, Seth Tisue, Jamie Thompson, Sébastien Doeraene, Scala Steward, Georgi Krastev, Jason Zaugg, Philippus, Balys Anikevicius, Gilad Hoch, NthPortal, Zhang Zhipeng, Arman Bilge, Dale Wijnand, Dominik Helm, Eric Huang, Guillaume Martres, Harrison Houghton, Krzysztof Pado, Michał Pałka, Zeeshan Arif, counter2015, jxnu-liguobin, mcallisto, naveen, philwalk.

Thanks to Lightbend for their continued sponsorship of the Scala core team’s efforts. Lightbend offers commercial support for Scala.

Scala 2.13 notes

The release notes for Scala 2.13.0 have important information applicable to the whole 2.13 series.

Obtaining Scala

Scala releases are available through a variety of channels, including (but not limited to):

• Bump the scalaVersion setting in your sbt-based project
• Download a distribution from scala-lang.org
• Obtain JARs via Maven Central