Allow either -Xsource:3 (for preparing to switch to 3) or -Xsource:3-cross (for crossbuilding on 2 and 3); some existing users of -Xsource:3 should switch to -Xsource:3-cross to avoid unwanted behavior changes (#10573 by @som-snytt)
A new section in the Scala 3 Migration Guide documents -Xsource:3 and -Xsource:3-cross: documentation
For migration to 3, accommodate case companion as function (#10648 by @som-snytt)
Scala 3 migration warning for implicits found in package prefix (#10621 by @lrytz)
Other improvements
-Yrelease supplements -release, allows access to additional JVM packages (#10543 by @som-snytt)
-Xlint now enables -Xlint:named-booleans to lint unnamed boolean literal args (#10612 by @som-snytt)
Respect java.lang.Deprecated annotation even in Scala sources (#10517 by @kapunga)
Optimize tail recursion on effectively final methods even when final keyword is absent (#10629 by @som-snytt)
Add -Xlint:pattern-shadow to lint pattern varids which are backquotable (#8806 by @som-snytt)
In mixed compilation, allow Java sources to reference MODULE$ (#10644 by @som-snytt)
Scaladoc: re-align -doc-source-url behavior with 2.12 (#10581 by @lrytz)
Known issues
When upgrading to 2.13.13, existing users of -Xsource:3 should explicitly consider switching to -Xsource:3-cross. Some behaviors of -Xsource:3 have changed, e.g. in result type inference for inherited methods; see new doc page for details
Some library authors who were already using -Xsource:3 are getting MiMa failures when upgrading to 2.13.13 and switching from -Xsource:3 to -Xsource:3-cross. If you’re in this situation, you may need to wait for 2.13.14; see scala/bug#12961
Users of sbt must upgrade to sbt 1.9.9 to use the console task to access the 2.13.13 REPL (sbt/sbt#7502); error message is NoSuchMethodError: org.jline.utils.AttributedString.fromAnsi
Regression: Scaladoc generation may fail if you are using the TASTy reader to access Scala 3 dependencies (scala/bug#12955); error message is "Unsupported Scala 3 generic tuple type"; we'll fix it in 2.13.14
Regression: on JDK 11 (but not 8 or 17 or 21), the REPL prints a harmless "illegal reflective access" warning at startup (scala/bug#12957); we'll fix it in 2.13.14
The inclusion of -Xlint:named-booleans in -Xlint (#10612) has already proved at least somewhat controversial, and will likely be adjusted for 2.13.14; you can leave feedback on this at #10704
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Bumps org.scala-lang:scala-library from 2.12.18 to 2.13.14.
Release notes
Sourced from org.scala-lang:scala-library's releases.
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Commits
a527019
Merge pull request #10758 from som-snytt/fix/repl-color-reduxa064a89
Minimize diff for isTerminal probe6b68db9
Merge pull request #10739 from som-snytt/issue/9609-doc-doc-options83332ad
Merge pull request #10755 from lrytz/10704-followupfcf69c4
Merge pull request #10753 from som-snytt/test/fixup698369d
Align WConf category for WFlagUnnamedBooleanLiteraleea7029
Move terminal test to propertiesb68ac48
Merge pull request #10751 from som-snytt/sd/867-jdk22-tests2c78ad2
Console color only if JDK 22 says isConsole770e6a0
Merge pull request #10749 from SethTisue/skip-jdeps-on-jdk-22You can trigger a rebase of this PR by commenting
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