Note

Scala 3.6.2 would become the first official release for the Scala 3.6 series.
Versions 3.6.0 (a broken release) and 3.6.1 (a hotfix release) should never be used. For more information, refer to the Scala 3.6.0 Post Mortem blogpost

Scala 3.6.2 should effectively be regarded as "3.6.0" for all intents and purposes.
This includes also an exception in versioning of produced TASTy files by its release candidates - 3.6.2-RC*.
Scala compiler emits TASTy files in an experimental version for candidates of a new minor version (e.g. 3.x.0-RC1), contrary to release candidates of a new patch version (e.g. 3.x.1-RC1) that emit a non-experimental TASTy in version established by the first stable release of their respective minor version.
Libraries should never publish artifacts containing experimental TASTy files. Instead, authors should wait until the stabilization of the TASTy format in Scala 3.6.2.

Highlights of the release

Stabilise SIP-47 (Adding Clause Interleaving to method definitions) #20861
Stablise SIP-64 #21668
Context Bounds for Polymorphic Functions #21643
Make named tuples a standard feature #21680
Switch mapping of context bounds to using clauses in 3.6 #21257
Enable betterMatchTypeExtractors in >= 3.6 #21198
Require named arguments for java defined annotations #21329
Refine the bounds of the Tuple.Filter type lambda predicate .. #21286
Add an infix shorthand for Tuple.{Append, Concat} #21288
Move NonEmptyTuple members into Tuple #21291
Add .msi artifacts to release assets #21834
Migration rewrites for infix arguments interpreted as named tuples #21949
Implement SIP-62 as experimental - For comprehension improvements #20522
Implement SIP-57 as experimental - add runtimeChecked method and annotation #20987

Other changes and fixes

Annotations

Tighten java annot value parsing #21650

Erasure

Fixes IllegalAccessError with Java package protected class #21362

Experimental: Capture Checking

Fix setup of CapSet arguments. #21309
Check all top-level covariant capture sets in checkNotUniversal #21428
Charge also dcs of local reaches to capture set of enclosing method #21443
No need to unbox if expected type is LhsProto #21508
Treat more closure parameter types as inferred #21583
Existential Capabilities #20566
Fixes for cleanup retains scheme #21350
Improve Contains handling #21361
Expand Capability types T to T^ only if no explicit capture set is given #21375
Tighten closure extractor in TreeInfo #21621

Experimental: Global Initialization

Analyze object when selecting from package #21511
Fix bug in init checker while compiling scodec-bits community project #21574

Experimental: Strict Equality

Fix #21392: Adjust canComparePredefined(Nothing, T) in explicit nulls #21504
Add tracking of NotNullInfo for Match, Case, Try trees (fix #21380) #21389

Experimentals

[experimental feature] Support HOAS pattern with type variables for quote pattern matching #18271

Exports

Re-use attachment in exportForwarders to handle ambiguous overloads #21518
Allow export statements in AnyVal #21653

Extension Methods

Make right assoc ext method fwd refs error #21641

Inline

Fix: throw an error before assigning ErrorType when expanding constValue #21364

Implicits

Fix prioritization of givens over implicits #21226

JVM Backend

Backend computes line number from source of position #21763

Linting

CheckUnused checks type param annotations #20549

Match Types

Fix #21295: Restrict provablyDisjoint with Nothings in invariant type params. #21891
Do not propagate TypeErrors of ops from TypeComparer#tryAlso #21070
Fix #21402: Always allow type member extraction for stable scrutinees in match types. #21700
Add a 3.6-migration warning for MT lubbing #21336
Always interpret underscores inside patterns as type bounds #21718

Opaque Types

Capture the kse3 issue in test cases and close it #21260

Parser

Guard against recursive lower bounds in constraints #21587
Handle old given syntax where identifier and type are seperated by new line #21957
Fix: Allow as as an infix type in non context bound types #21849
Revised given syntax #21208

Pattern Matching

Optimise SpaceEngine.signature #21791
Fix a bundle of patmat issues #21000

Pickling

Some fixes for AnnotatedTypes mapping #19957

Polyfunctions

Fix: Check if a PolyFunction TypeTree has no ByName parameters #21671

Presentation Compiler

Add regression test for issue 18726 #20318
Remove artificial CURSOR added to code in the completions #20899
Fix autoimports with using directives #21590

Quotes

Handle suspension due to macro call in arbitrary phases #21651
Have a better error message when healing types #21711
Bound TypeRepr by Matchable in Quotes #21377
Expr#show: Don't crash when the expression contains an unsupported type (like a SkolemType) #20494

Reflection

Add the possibility to create a typeSymbol in the Quotes API #20347
Fix stale symbols connected to lazy vals in macros #21559

Reporting

Add better error reporting for inlined non-immutable paths #21639
Only replace new errors by warnings under -migration #21289
Warn when named tuples resemble assignments #21823

REPL

REPL: JLine 3.27.0 (was 3.25.1) #21752
Ignore best effort settings in repl and update docs #21540

Rewrites

Remove empty argument lists for classes with only context bounds #21513
Fix rewrite logic for old <function> _ syntax #21715
Remove the -rewrite option for typechecks methods in Quotes #21547
Add migration rewrite for non-named arguments in Java annotations #21397

Scaladoc

Only trim one newline when preprocessing the content of a markdown code snippet #21519
Filter opaque modifier from object documentation #21640
Bump Inkuire version to fix it for the new Scala versions #21611

Standard Library

Scala 2.13.15 (was .14) #21648
Define binary symbolic compiletime ops as infix #21683
Finalize named tuples #21710
Move NamedTuple.head to NamedTupleDecomposition #21308

Transform

Fix treatment of separately compiled @native methods in FirstTransform #21593
Three fixes to SAM type handling #21596
Always rewrite empty List() to Nil #21689
Add support for clauseInterleaving in JVM generic signatures #21709

Typeclass Derivation

Nicer error message in case a derived method has an explicit term param #21332

Typer

Calm param autotupling for overloads #21552
Survive inaccessible types when computing implicit scope #21589
Avoid cyclic errors forcing default arg types #21597
Allow autotupling if fn's param is a type param #21741
Fix extending protected nested java classes #21857
Fix incorrect caching with dependent method parameters #21699

Contributors

Thank you to all the contributors who made this release possible 🎉

According to git shortlog -sn --no-merges 3.5.2..3.6.2-RC1 these are:

   128 Martin Odersky
    44 Dale Wijnand
    42 Wojciech Mazur
    35 Hamza REMMAL
    33 Kacper Korban
    31 Eugene Flesselle
    22 Hamza Remmal
    11 Katarzyna Marek
    10 Matt Bovel
     9 noti0na1
     9 rochala
     8 Jamie Thompson
     8 Jan Chyb
     7 Adrien Piquerez
     7 Som Snytt
     7 Sébastien Doeraene
     7 dependabot[bot]
     6 Yichen Xu
     5 EnzeXing
     5 Guillaume Martres
     4 Fengyun Liu
     4 kasiaMarek
     3 Martin Duhem
     3 Oliver Bracevac
     3 Piotr Chabelski
     2 Aleksander Rainko
     2 David Hua
     2 Florian3k
     2 HarrisL2
     2 Joel Wilsson
     2 Jędrzej Rochala
     2 Kenji Yoshida
     1 Eugene Yokota
     1 Kavin Satheeskumar
     1 Lorenzo Gabriele
     1 Michel Charpentier
     1 Ondrej Lhotak
     1 Raphael Jolly
     1 Tomasz Godzik
     1 Yuito Murase
     1 crunchyfrog
     1 philippus

scala/scala3 3.6.2-RC1 on GitHub