3.7.1-RC1

Highlights of the release

• Support for JDK 25 #23004
• Warn if interpolator uses toString #20578
• Warn if match in block is not used for PartialFunction #23002

Other changes and fixes

Annotations

• Approximate annotated types in wildApprox #22893
• Keep unused annot on params #23037

Erasure

• Disallow context function types as value-class parameters #23015

Experimental: Capture Checking

• Two fixes to handling of abstract types with cap bounds #22838
• Drop idempotent type maps #22910
• Fix setup of class constructors #22980

Named Tuples

• Call dealias after stripping type variables for tupleElementTypesUpTo #23005
• Avoid loosing denotations of named types during integrate #22839

Experimental: Unroll

• Fix #22833: allow unroll annotation in methods of final class #22926

Experimental: Referencable Package Objects

• Add experimental.packageObjectValues language setting #23001

Exports

• Respect export alias for default arg forwarder #21109

Extension Methods

• Extension check checks for no parens not empty parens #22825

GADTs

• Fix: Prevent GADT reasoning in pattern alternatives #22853

Linting

• Dealias when looking into imports #22889
• Process Export for unused check #22984
• Drill into QuotePattern bindings symbol info #22987
• No warn implicit param of overriding method #22901
• No warn for evidence params of marker traits such as NotGiven #22985

Initialization

• Check for tasty error in template trees. #22867

Metaprogramming: Compile-time

• Fix issue with certain synthetics missing in compiletime.typechecks #22978

Pattern Matching

• Fix existing GADT constraints with introduced pattern-bound symbols #22928

Pickling

• Fix fromProduct synthesized code for parameter-dependent case classes #22961

Presentation Compiler

• Completions for requests just before string #22894
• Fix: go to def should lead to all: apply, object and class #22771
• Ignore ending $ when looking at end marker names #22798
• Feature: Skip auto importing symbols we know are wrong in current context #22813
• Show the Autofill completion case as what would be auto-filled #22819
• Bugfix: Fix issues with annotations not detected #22878
• Improvement: Rework IndexedContext to reuse the previously calculated scopes #22898
• Pc: Properly adjust indentation when inlining blocks #22915
• Improvement: Support using directives in worksheets #22957
• Fix: show hover for synthetics if explicitly used #22973
• Pc: fix: inline value when def indentation equals 2 #22990

Rewrites

• Fix insertion of using in applications with trailing lambda syntax #22937
• Test chars safely when highlighting #22918

Reporting

• Print infix operations in infix form #22854

Scaladoc

• Chore: add support for 'abstract override' modifier #22802
• Scaladoc: fix generation of unique header ids #22779

Typer

• Disallow context bounds in type lambdas #22659
• Refuse trailing type parameters in extractors #22699
• Fix #22724: Revert the PolyType case in #21744 #22820
• Fix isGenericArrayElement for higher-kinded types #22938
• Tighten condition to preserve denotation in IntegrateMap #23060

Transform

• Mix in the productPrefix hash statically in case class hashCode #22865

Value Classes

• Fix #21918: Disallow value classes extending type aliases of AnyVal #23021

Contributors

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

According to git shortlog -sn --no-merges 3.7.0..3.7.1-RC1 these are:

   135  Martin Odersky
    27  Som Snytt
    13  Matt Bovel
    10  Wojciech Mazur
     9  Hamza Remmal
     5  Quentin Bernet
     5  Tomasz Godzik
     4  aherlihy
     3  HarrisL2
     3  Jan Chyb
     3  Natsu Kagami
     3  Ondrej Lhotak
     3  Sébastien Doeraene
     2  Piotr Chabelski
     2  Yichen Xu
     2  Yoonjae Jeon
     2  kasiaMarek
     1  Aleksey Troitskiy
     1  Daisy Li
     1  Dale Wijnand
     1  Jan-Pieter van den Heuvel
     1  Jędrzej Rochala
     1  Kacper Korban
     1  Katarzyna Marek
     1  Lukas Rytz
     1  Mikołaj Fornal
     1  Nikita Glushchenko
     1  Oliver Bračevac
     1  Ondřej Lhoták
     1  dependabot[bot]
     1  noti0na1
     1  philippus

3.7.0

See release blogpost: https://www.scala-lang.org/news/3.7.0/

Highlights of the release

• Add @scala.annotation.internal.preview annotation and -preview flag. #22317
• Make SIP-52 @publicInBinary a stable feature in 3.7 #22591
• Make SIP-58 - Named Tuples a stable feature in 3.7 #22753
• Make SIP-62 - Better Fors a preview feature in 3.7 #22776
• Implement SIP-61 @unroll annotation as experimental #21693
• Upgrade Scala 2 Standard Library to 2.13.16 #22386
• Upgrade Scala.js to 1.19.0 #23026
• Upgrade Scala CLI to 1.7.1 #22843
• Expression Compiler is now part of Scala 3 compiler #22597
• Quotes API: Added apply methods to import selectors #22457
• Quotes API: Implement experimental summonIgnoring method #22417
• Quotes API: Add class parameters, flags, and privateWithin and annotations to experimental newClass methods #21880
• Experimental: Capture Calculus - Inferring tracked modifier #21628
• Presentation Compiler: Show inferred type on holes in hover #21423
• JVM Backend: Fix #15736 blocking Scala 3 on Android #22632
• REPL: add flag to quit after evaluating init script #22636
• REPL: implement :jar (deprecate :require) #22343
• Linting: Improvements to -Wunused and -Wconf #20894
• Implicit parameters warn at call site without using keyword #22441
• Support for dependent case classes #21698
• Deprecate Yno-kind-polymorphism #22814

Other changes and fixes

Annotations

• Lift arguments of explicitly constructed annotations #22553
• Fix copy of annotation on @main methods #22582
• @publicInBinary has now effect on secondary constructors #22630
• Fix mapping of annotations #22407

Backend: Scala.js

• Emit js.NewArray IR nodes when possible. #22446
• Fix #22794: Emit the definition of Arrays.newArray even though it's a primitive #22797

Classpath

• Fix empty ClassPath attribute in one or more classpath jars causes crash #22462

Documentation

• Improve the usage of inclusive language #22360

Erasure

• Handle type aliases in contextFunctionResultTypeAfter #21517
• Align erasure of Array[Nothing] and Array[Null] with Scala 2 #22517

Desugering

• Under betterFors don't drop the trailing map if it would result in a different type (also drop _ => ()) #22619

Experimental: Capture Checking

• Canonicalize capture variable subtype comparisons #22299
• Permit Capture Refs for Uninitialized Type and Term Params in BiTypeMap #22451
• Fix maximal capability handling and expand aliases #22341

Experimental: Modularity

• Widen skolem types when adding parent refinements #22488

Experimental: Global Initialization Checker

• Refactor the abstract domain of global init checker to compile http4s #22179
• Fix global init checking crash when using a value defined in by-name closure #22625

Experimentals

• Expand value references to packages to their underlying package objects #22011

Implicits

• Restrict implicit args to using #22458

Linting

• Suppress spurious Suppression #22383
• CheckUnused checks span.exists before testing its parts #22504
• Don't warn retainedBody #22510
• Handle Typeable #22663
• Nowarn public implicit val class params #22664
• Exclude synthetic this.m, Any.m from import lookup #22695
• Warn unused member of anonymous class #22729
• Ignore params to default arg getters #22749
• Lazy val def member is pattern var #22750
• Restore resolving prefixes of implicit Ident #22751
• No warning for parameter of overriding method #22757
• Dealias before checking for member in lint #22708
• Warn on bad extensions of aliases #22362
• Warn universal extensions on opaque types #22502
• Discourage default arg for extension receiver #22492
• Rename on import is never wildcard #22712
• Collect nowarn symbols instead of skipping them #22766
• Revert unconditional lint of Inlined expansion #22815

Match Types

• Handle NoType in TypeComparer.disjointnessBoundary #21520

Named Tuples

• Special case NamedTuple.From for arguments derived from Tuple #22449
• Generate mirrors for named tuples #22469
• Two fixes to NamedTuple pattern matching #22953

Opaque Types

• Fix stack overflow errors when generating opaque type proxies #22479
• Fix inline proxy generation for opaque types referencing other opaque types #22381
• Fix opaque types leaking rhs when inlined and found in type params (and a related stale symbol issue) #22655

Overloading

• Make overload pruning based on result types less aggressive #21744
• Fail compilation if multiple conflicting top-level private defs/vals are in the same package #22759

Parser

• Fix annotations being not expected in the middle of an array type by java parser #22391
• No outdent at eof #22435
• Allow observing an indent after conditional #22611
• Correctly detect colon lambda eol indent for optional brace of argument #22477

Pattern Matching

• Avoid crash in uninhab check in Space #22601
• Account for named tuples in space subtraction #22658
• Check exhaustivity of any case class #22604

Presentation Compiler

• Add enum type param support in sourceSymbol #18603
• Map name position to desugared version of named context bound #22374
• Hover and go to definition for named tuples #22202
• Completions: do not complete package #20532
• Print parens for single method argument only if a direct tuple type #21510
• Improvement: use heuristic to figure out nameSpan if pointDelta too big #22484
• Fix inferredTypeEdits for symbols #22485
• Fix: Only fallback to the definition of a synthetic valdef if it is zero extent #22551
• Better LSP completions inside of backticks #22555
• Don't search for members in pc info when irrelevant #22674
• Backport from Metals #22426
• Backport from Metals #22491
• Backport from Metals #22665

Runner

• Upgrade Scala CLI to [1.7.1 highlights](https://github.com/VirtusLab/scala...

3.3.6-RC3

Backported fixes

• classfile reader: handle JDK 9+ constant types in constant pool #19533
• Update asm to 9.8.0 #23004

Contributors

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

According to git shortlog -sn --no-merges 3.3.6-RC2..3.3.6-RC3 these are:

     2  Seth Tisue
     1  Tomasz Godzik
     1  philippus

3.3.6-RC2

Reverted changes

• Do not lift annotation arguments #22035 and #22046

Contributors

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

According to git shortlog -sn --no-merges 3.3.6-RC1..3.3.6-RC2 these are:

     3  Tomasz Godzik

3.7.0-RC4

Backported changes

• Backport "Upgrade to Scala.js 1.19.0." to 3.7 #23035

Contributors

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

According to git shortlog -sn --no-merges 3.7.0-RC3..3.7.0-RC4 these are:

     2  Sébastien Doeraene
     1  Tomasz Godzik

3.7.0-RC3

Backported changes

• Backport "Two fixes to NamedTuple pattern matching" to 3.7.0 #22995
• Backport "changes to scala.caps in preparation to make Capability stable" to 3.7.0 #22967

Contributors

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

According to git shortlog -sn --no-merges 3.7.0-RC2..3.7.0-RC3 these are:

     4  Martin Odersky
     2  Wojciech Mazur
     1  Natsu Kagami

3.7.0-RC2

Backported changes

• Backport "Check trailing blank line at EOF for OUTDENT" to 3.7.0 #22942
• Backport "Fail compilation if multiple conflicting top-level private defs/vals are in the same package" to 3.7 #22932
• Backport "Deprecate Yno-kind-polymorphism" to 3.7 #22931
• Backport "Revert unconditional lint of Inlined expansion" to 3.7 #22930
• Backport "Bump Scala CLI to v1.7.1 (was v1.7.0)" to 3.7 #22929
• Backport "Fix #22794: Emit the definition of Arrays.newArray even though it's a primitive." to 3.7.0 #22801

Reverted changes

• Revert "Make overload pruning based on result types less aggressive" in 3.7.0 #22940

Contributors

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

According to git shortlog -sn --no-merges 3.7.0-RC1..3.7.0-RC2 these are:

     4  Som Snytt
     4  Wojciech Mazur
     1  Jan Chyb
     1  Piotr Chabelski
     1  Sébastien Doeraene
     1  Yichen Xu

3.3.6-RC1

Highlights of the release

• Partial Fix #21242: Add REPL init script setting #22206
• Update asm to patched 9.7.1 #22250
• REPL: Add back :silent command #22248
• Do not lift annotation arguments #22035 and #22046
• Scala 2 forwardport: -Yprofile-trace #19897

Other changes and fixes

Annotations

• Make sure symbols in annotation trees are fresh before pickling #22002
• Fix Java parsing of annotations on qualified types #21867
• Rename InlineCopier to ConservativeTreeCopier, use it in TypeMaps #21941
• Consider all arguments in Annotations.refersToParamOf #22001

Backend

• Flag class file collision as error #19332
• Backend computes line number from source of position #21763

CI

• In CI, use new standard scala/cla-checker action #22203
• Cancel stale CI executions when CI is re-triggered in the same branch/PR #21974
• Drop support for old experimental in community-build #21729

Coverage

• Fix coverage serialization when encountering macro suspension #22303

Dependencies

• Sbt 1.10.5 (was 1.9.9) #20157
• Scala 2.13.16 (was .15) #22386

Desugaring

• Fix #22051: only trust the type application part for case class unapplies #22099

Documentation

• Fix: typo in documentation for Tuple.zip #22313
• Copyright 2025 #22326
• Documentation only: update Example code linked to obsolete content in macros-spec.md #22256
• Doc fix, removed repeated use of the word with #21915
• Fix typos #21913

Enums

• Add type parameters derived from enum to default param getters of enum cases #22157

Extension Methods

• Add regression test for #22320 #22321
• Tweak ExtensionNullifiedByMember #22268

Infrastructure

• Improve, document and group versioning code in Build.scala #21837
• Fix: drop jackson-module-scala from CB #22353
• Fix inductive-implicits benchmark #22007
• Remove tests/pos-with-compiler-cc from VSCode ignored files #22198
• Bump webrick from 1.8.2 to 1.9.1 in /docs/_spec #22066
• Fix Windows OS detection in TraceNameManglingTest #21937
• Don't warn for deprecated Thread.getId() calls in ChromeTrace #21831
• Improvement: Remove workaround for Bloop and update docs #21842
• Ensure ChromeTraceTest event timestamps are emitted in correct invervals #21911
• Remove tests/pos-with-compiler-cc #21956
• Shade scalajs.ir under dotty.tools #21765

Implicits

• Rollback constraints in compareAppliedTypeParamRef #22339
• Apply implicit conversion from derived Conversion instance defined as implicit rather than given #21785

Imports

• Allow imports nested in packagings to shadow #21539

Inline

• Fix inline reduction for CaseDef guards with asInstanceOf #22305
• Avoid using the current denotation in NamedType.disambiguate #21414

Linting

• Append instead of prepending import selectors for the current scope when collecting them in CheckUnused #22314
• Allow discarding "Discarded non-Unit" warnings with : Unit #21927
• Disallow open modifier on objects #21922
• Only count associated files of direct members of package objects in dropStale #22190

Metaprogramming

• Rethrow SuspendExceptions caught in CodeGen phase #22009
• Extend compiletime.testing.typechecks with certain transform phases #21185

Match Types

• Fix #21841: Check more that an unapplySeq on a NonEmptyTuple is valid. #22366
• Type avoidance in MT bound inference #22142

Nullability

• Fix #21619: Refactor NotNullInfo to record every reference which is retracted once. #21624

Parser

• Fix: don't consider into as a soft-modifier #21924
• Fix: Allow as as an infix type in non context bound types #21849
• Undo patch of double-block apply #21982

Pattern Matching

• (Re-)Drop inaccessible subclasses from refineUsingParent #21930
• Fix #21914: Don't project nested wildcard patterns to nullable #21934
• Fix use of class terms in match analysis #21848
• Fix provablyDisjoint handling enum constants with mixins #21876
• Do not consider uninhabited constructors when performing exhaustive match checking #21750

Pickling

• Avoid orphan param from default arg #21824
• Make sure definition tree has the defined symbol #21851

Presentation Compiler

• Use new infer expected type for singleton complations #21421
• Fix presentation compiler testcases #22253
• Fix match error in keyword completions #22138
• Add test cases project for presentation compiler #22101
• Improvement: Update mtags to 1.4.1 and backport remaining changes #21859
• Backport changes for the presentation compiler from Metals #21756

Quotes

• Fix tupleTypeFromSeq for XXL tuples #21782
• Do not bring forward symbols created in transform and backend phases #21865
• Fix #20471: owners of top-level symbols in cached quoted code being incorrect #21945
• Fix for macro annotation that resolves macro-based implicit crashing the compiler #20353
• Allow macro annotations to recover from suspension #21969

REPL

• REPL: JLine: follow recommendation to use JNI, not JNA; also JLine 3.27.1 (was 3.27.0) #22205
• Fix #9879: allow top-level opaque type definitions in REPL #21753

Reflection

• Do not return java outline dummy constructor in primaryConstructor #22104

Reporting

• Normalise the types for Type Mismatch Error (E007) #22337
• Do not warn about expected missing positions in quotes.reflect.Symbol #21677
• Add missing error messages to asserts in QuotesImpl #21852
• Don't point to the compiler backlog when a compiler plugin phase crashes #21887
• Nowarn extension matching nonpublic member #21825
• Fix: better error messages when an enum derives from AnyVal #22236

Scaladoc

• [ISSUE-#19208] If scaladocs on file protocol don't do SPA routing. #22013
• Fix scaladoc graph highlight background color in dark mode #21814

SemanticDB

• Extract semanticDB for lifted definitions #21856

Specification

• Align the spec to allow the marker #22323
• Fix #202...

3.7.0-RC1

Highlights of the release

• Add @scala.annotation.internal.preview annotation and -preview flag. #22317
• Make SIP-52 @publicInBinary a stable feature in 3.7 #22591
• Make SIP-58 - Named Tuples a stable feature in 3.7 #22753
• Make SIP-62 - Better Fors a preview feature in 3.7 #22776
• Implement SIP-61 @unroll annotation as experimental #21693
• Implement SIP-68 Reference-able Package Objects as experimental #22011
• Upgrade Scala 2 Standard Library to 2.13.16 #22386
• Upgrade Scala.js to 1.18.1. #22397
• Upgrade Scala CLI to 1.7.0 #22735
• Expression Compiler is now part of Scala 3 compiler #22597
• Quotes API: Added apply methods to import selectors #22457
• Quotes API: Implement experimental summonIgnoring method #22417
• Quotes API: Add class parameters, flags, and privateWithin and annotations to experimental newClass methods #21880
• Experimental: Capture Calculus - Inferring tracked modifier #21628
• Presentation Compiler: Show inferred type on holes in hover #21423
• JVM Backend: Fix #15736 blocking Scala 3 on Android #22632
• REPL: add flag to quit after evaluating init script #22636
• REPL: implement :jar (deprecate :require) #22343
• Linting: Improvements to -Wunused and -Wconf #20894
• Implicit parameters warn at call site without using keyword #22441
• Minimal support for dependent case classes #21698

Other changes and fixes

Annotations

• Lift arguments of explicitly constructed annotations #22553
• Fix copy of annotation on @main methods #22582
• @publicInBinary has now effect on secondary constructors #22630
• Fix mapping of annotations #22407

Backend: Scala.js

• Emit js.NewArray IR nodes when possible. #22446

Classpath

• Fix empty ClassPath attribute in one or more classpath jars causes crash #22462

Documentation

• Improve the usage of inclusive language #22360

Erasure

• Handle type aliases in contextFunctionResultTypeAfter #21517
• Align erasure of Array[Nothing] and Array[Null] with Scala 2 #22517

Desugering

• Under betterFors don't drop the trailing map if it would result in a different type (also drop _ => ()) #22619

Experimental: Capture Checking

• Canonicalize capture variable subtype comparisons #22299
• Permit Capture Refs for Uninitialized Type and Term Params in BiTypeMap #22451
• Fix maximal capability handling and expand aliases #22341

Experimental: Modularity

• Widen skolem types when adding parent refinements #22488

Experimental: Global Initialization Checker

• Refactor the abstract domain of global init checker to compile http4s #22179
• Fix global init checking crash when using a value defined in by-name closure #22625

Experimentals

• Expand value references to packages to their underlying package objects #22011

Implicits

• Restrict implicit args to using #22458

Linting

• Suppress spurious Suppression #22383
• CheckUnused checks span.exists before testing its parts #22504
• Don't warn retainedBody #22510
• Handle Typeable #22663
• Nowarn public implicit val class params #22664
• Exclude synthetic this.m, Any.m from import lookup #22695
• Warn unused member of anonymous class #22729
• Ignore params to default arg getters #22749
• Lazy val def member is pattern var #22750
• Restore resolving prefixes of implicit Ident #22751
• No warning for parameter of overriding method #22757
• Dealias before checking for member in lint #22708
• Warn on bad extensions of aliases #22362
• Warn universal extensions on opaque types #22502
• Discourage default arg for extension receiver #22492
• Rename on import is never wildcard #22712
• Collect nowarn symbols instead of skipping them #22766

Match Types

• Handle NoType in TypeComparer.disjointnessBoundary #21520

Named Tuples

• Special case NamedTuple.From for arguments derived from Tuple #22449
• Generate mirrors for named tuples #22469

Opaque Types

• Fix stack overflow errors when generating opaque type proxies #22479
• Fix inline proxy generation for opaque types referencing other opaque types #22381
• Fix opaque types leaking rhs when inlined and found in type params (and a related stale symbol issue) #22655

Overloading

• Make overload pruning based on result types less aggressive #21744

Parser

• Fix annotations being not expected in the middle of an array type by java parser #22391
• No outdent at eof #22435
• Allow observing an indent after conditional #22611
• Correctly detect colon lambda eol indent for optional brace of argument #22477

Pattern Matching

• Avoid crash in uninhab check in Space #22601
• Account for named tuples in space subtraction #22658
• Check exhaustivity of any case class #22604

Presentation Compiler

• Add enum type param support in sourceSymbol #18603
• Map name position to desugared version of named context bound #22374
• Hover and go to definition for named tuples #22202
• Completions: do not complete package #20532
• Print parens for single method argument only if a direct tuple type #21510
• Improvement: use heuristic to figure out nameSpan if pointDelta too big #22484
• Fix inferredTypeEdits for symbols #22485
• Fix: Only fallback to the definition of a synthetic valdef if it is zero extent #22551
• Better LSP completions inside of backticks #22555
• Don't search for members in pc info when irrelevant #22674
• Backport from Metals #22426
• Backport from Metals #22491
• Backport from Metals #22665

Runner

• Upgrade Scala CLI to 1.7.0 highlights
  • Switch to scalameta/scalafmt images of scalafmt 3.9.1+ #3502
  • Support the --test command line option for run subcommand #3519
  • Support the --test command line option for package subcommand #3519
  • Detect objects with main class in scripts #3479
  • ...

3.6.4

Highlights of the release

• Support for JDK 24 #22250
• REPL :silent command to toggle automatic printing of outputs #22248
• REPL --repl-init-script: setting to run a code on startup #22206
• Deprecated setting -Xno-decode-stacktraces is now an alias to -Xno-enrich-error-messages #22208
• Annotation arguments are no longer lifted #22035
• Experimental Capture Checking: Implement tracked members #21761

Breaking changes

• Align @implicitNotFound and @implicitAmbigous with the language specification #22371

  This change may impact users who previously used these annotations using variables or string interpolation.

  Previously, a bug in the Scala 3 compiler allowed non-literal strings to be passed as arguments to the @implicitNotFound and @implicitAmbiguous annotations.
  This could have affected how failed implicit search results were reported by the compiler.

  Starting from Scala 3.6.4, the arguments for these annotations must be string literals.
  If a message is too long, it can be concatenated using the + operator, allowing for constant folding.

Other changes and fixes

Annotations

• Make sure symbols in annotation trees are fresh before pickling #22002
• Consider all arguments in Annotations.refersToParamOf #22001
• Do not lift annotation arguments (bis) #22046

Desugaring

• Fix #22051: only trust the type application part for case class unapplies #22099

Documentation

• Update example code linked to obsolete content in macros-spec.md #22256

Experimental: Capture Checking

• Fix #21868, #21869, and #21870: handle CapsOf in more places #21875
• Refine rules for capture parameters and members #22000
• Add a hint for using CC with REPL #22220
• Consolidate CC #21863

Experimental: Global Initialization

• Fix crash when initializing val in ByName closure #22354

Experimental: Named Tuples

• Handle TypeProxy of Named Tuples in unapply #22325
• Fail more eagerly when trying to adapt named unapply patterns #22315
• Widen singleton types when computing fields from .Fields #22149
• Fix .toTuple insertion #22028

Extension Methods

• Tweak ExtensionNullifiedByMember #22268
• Nowarn extension matching nonpublic member #21825

Implicits

• Rollback constraints in compareAppliedTypeParamRef #22339
• Try implicit searching after finding dynamic select #22318

Linting

• Allow discarding "Discarded non-Unit" warnings with : Unit #21927

Match Types

• Fix #21841: Check more that an unapplySeq on a NonEmptyTuple is valid. #22366
• Type avoidance in MT bound inference #22142

Metaprogramming

• Rethrow SuspendExceptions caught in CodeGen phase #22009

Metaprogramming: Compile-time

• Extend compiletime.testing.typechecks with certain transform phases #21185

Nullability

• Fix #21619: Refactor NotNullInfo to record every reference which is retracted once. #21624

Presentation Compiler

• Use new infer expected type for singleton complations #21421
• Fix match error in keyword completions #22138

Reflection

• Do not return java outline dummy constructor in primaryConstructor #22104

Reporting

• Normalise the types for Type Mismatch Error (E007) #22337
• Improve given search preference warning #22189
• Better error messages when an enum derives from AnyVal #22236
• Correctly print litteral types in the refined printer #22351

Rewrites

• Undo patch of double-block apply #21982

Scaladoc

• Scaladoc: Add support for named tuples #22263

Settings

• Limit exposure to ConcurrentModificationException when sys props are replaced or mutated #22180

Specification

• Align the spec to allow the marker #22323
• Integrate the specification for match types. #22164

Transform

• Fix #22226: Use classOf[BoxedUnit] for Unit array in ArrayConstructors. #22238

Typer

• Fixes for isLegalPrefix change #22241
• Resolve name when named imp is behind wild imps #21888

Contributors

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

According to git shortlog -sn --no-merges 3.6.3..3.6.4 these are:

    46  Martin Odersky
    33  noti0na1
    24  Wojciech Mazur
    14  Dale Wijnand
    13  Matt Bovel
    11  Hamza Remmal
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