chore(deps): update dependency scala to v2.12.20

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
scala (source)	2.12.15 -> 2.12.20

Test plan: CI should pass with updated dependencies. No review required: this is an automated dependency update PR.

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Release Notes

scala/scala (scala)

v2.12.20: Scala 2.12.20

Compare Source

This release improves compatibility:

• Support JDK 23 in optimizer (via upgrade to patched ASM 9.7.0) (#​10747 by @​Philippus)
• Bump scala-xml dependency to 2.3.0 (was 2.2.0) (#​10782)

and compiler profiling:

• Collect statistics without printing them (#​10798 by @​szeiger)

For complete 2.12.20 change lists, see all merged PRs and all closed bugs.

Compatibility

As usual for our minor releases, Scala 2.12.20 is binary-compatible 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.

This release was brought to you by 8 contributors, according to git shortlog -sn --no-merges @​ ^v2.12.19. Thank you Scala Steward, Seth Tisue, Lukas Rytz, A. P. Marki, Hamza Remmal, Philippus Baalman, Stefan Zeiger, nbauma109.

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

Scala 2.12 notes

The release notes for Scala 2.12.0 have important information applicable to the whole 2.12 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

v2.12.19: Scala 2.12.19

Compare Source

This release improves compatibility:

• Support certain Java libraries compiled on JDK 21 (#​10675 by @​SethTisue)
• Support JDK 22 in optimizer (by upgrading to ASM 9.6) (#​10575 by @​Philippus)
• New -Yrelease option supplements -release, allows access to additional JVM packages (#​10671 by @​som-snytt)
• Update compiler's scala-xml dependency to 2.2.0 (was 2.1.0) (#​10459 by @​SethTisue)

And it has bugfixes:

• Fix rare NullPointerException in some tree-based collections (#​10640 by @​lrytz)
• Improved InterruptedException handling for Futures (#​10379 by @​szeiger)

For complete 2.12.19 change lists, see all merged PRs and all closed bugs.

Compatibility

As usual for our minor releases, Scala 2.12.19 is binary-compatible 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.

This release was brought to you by 9 contributors, according to git shortlog -sn --no-merges @​ ^v2.12.18 ^2.11.x. Thank you Scala Steward, Seth Tisue, A. P. Marki, Lukas Rytz, Stefan Zeiger, Dmitry Komanov, Philippus Baalman, cahilltr, dependabot.

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

Scala 2.12 notes

The release notes for Scala 2.12.0 have important information applicable to the whole 2.12 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

v2.12.18: Scala 2.12.18

Compare Source

This release improves compatibility:

• Support JDK 20 and 21 with ASM 9.5 upgrade, by @​Philippus (#​10185, #​10362)
• Fix crash reading JDK 21 classfiles (#​10397)

It also aids migration to Scala 2.13 and Scala 3:

• Under -Xsource:2.13, warn when inherited takes precedence over outer definitions (#​10297, #​10321)
• Under -Xsource:2.13, flag eta-expanding methods without parameter lists (#​10283)
• Under -Xsource:2.13, don't GLB binders of type patterns, use the type directly (#​10298)

and improves linting:

• Lint for integral divisions that are widened to a float (#​10313)

and enables improved tooling:

• Preserve tree attachment in the typer's Block/Apply inversion transform (#​10176)

For complete 2.12.18 change lists, see all merged PRs and all closed bugs.

Compatibility

As usual for our minor releases, Scala 2.12.18 is binary-compatible 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.

This release was brought to you by 6 contributors, according to git shortlog -sn --no-merges @​ ^v2.12.17 ^2.11.x. Thank you Seth Tisue, Lukas Rytz, Scala Steward, A. P. Marki, Jason Zaugg, Philippus Baalman.

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

Scala 2.12 notes

The release notes for Scala 2.12.0 have important information applicable to the whole 2.12 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

v2.12.17: Scala 2.12.17

Compare Source

This release has the following notable changes affecting compatibility:

• Always emit Java 8 bytecode on 2.12, regardless of -release; deprecate -target (#​10109)
• Upgrade the 2.12 scala-compiler's dependency on scala-xml to 2.1.0 (was 1.0.6) (#​10108)

It also fixes this regression in Scala 2.12.16:

• Correctly handle overloads in mixed compilation with Java inner classes (fixing 2.12.16 regression) (#​10045)

and aids migration to Scala 2.13:

• Under -Xsource:2.13, warn about changed precedence in imports (#​10095)

and eases cross-compilation with Scala 3:

• Accept and ignore using in method signature (to aid cross-building with Scala 3) (#​10075)

and enables improved tooling:

• Tooling support: Add a tree attachment to mark auto-applications (#​10063)
• Tooling support: Attachments for infix Apply and postfix Select (#​10042)
• Tooling support: Fix AST positions for XML literals, selections from blocks (#​10040)

For complete 2.12.17 change lists, see all merged PRs and all closed bugs.

Compatibility

As usual for our minor releases, Scala 2.12.17 is binary-compatible 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.

This release was brought to you by 7 contributors, according to git shortlog -sn --no-merges @​ ^v2.12.16 ^2.11.x. Thank you Lukas Rytz, Seth Tisue, Sébastien Doeraene, A. P. Marki, Jason Zaugg, Scala Steward, Daniel Esik.

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

Scala 2.12 notes

The release notes for Scala 2.12.0 have important information applicable to the whole 2.12 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

v2.12.16: Scala 2.12.16

Compare Source

This release improves compatibility with recent JDKs:

• Use ASM 9.3, enabling JDK 19 support (#​10000)
• Make -target support JDK 8 through 19 (and deprecate 5 through 7) (#​9916)
• Fix codegen for MethodHandle.invoke (et al) under JDK 17 -release (#​9930)
• Deprecate AnyVal#formatted(formatString), to avoid conflict with JDK 15+ method (#​9783)

and aids cross-compiling with Scala 3:

• Allow ? as a wildcard even without -Xsource:3 (#​10005)

and improves security and error reporting:

• For security, error on source files with Unicode directional formatting characters (#​10023, #​10030)
• Fix range position end for infix calls (#​9761)

For complete 2.12.16 change lists, see all merged PRs and all closed bugs.

Known issue

Scala 2.12.16 contains a regression that was discovered after the artifacts were published. Only mixed compilation of Scala and Java source files together is affected, and only when the Scala code contains references to certain nested classes in the Java sources. The problem manifests as a compile-time type error. Follow link for details and workarounds. We'll fix the problem in Scala 2.12.17 which we expect to release in a few months.

Compatibility

As usual for our minor releases, Scala 2.12.16 is binary-compatible 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.

This release was brought to you by 18 contributors, according to git shortlog -sn --no-merges @​ ^v2.12.15 ^2.11.x. Thank you Scala Steward, Seth Tisue, Lukas Rytz, Sébastien Doeraene, A. P. Marki, Daniel Le, Jason Zaugg, Guillaume Martres, Frank Thomas, Philippus, Daniela Sfregola, Dale Wijnand, Vadzim Marchanka, hepin.p, naferx, Fredrik Svensson, Štefan Jurčo, Georgi Krastev.

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

Scala 2.12 notes

The release notes for Scala 2.12.0 have important information applicable to the whole 2.12 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

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