3.3.2-RC1

Highlights of the release

• Improvements to code coverage (detailed list below)
• Add Stable Presentation Compiler #17528

Other changes and fixes

Backend

• Make sure synthetic apply methods are generated in deterministic order #18210

Coverage

• Only lift inner expressions when lifting repeated Typed arguments #18424
• Fix: scoverage statement's line number should be 1-base #18932
• Do not lift applications of context functions #18498
• Don't lift the argument of a synchronized block in scoverage #16941
• Fix the issue with coverage inside of a TypeApply #18420
• Coverage: mark case bodies as branches; don't ignore branches with synthetic spans #18437

Documentation

• Compiler plugin Scaladoc: document phase requirement #18394

Exports

• Refine override exclude criterion for export forwarders #17590

Incremental Compilation

• Fix overcompilation due to unstable context bound desugaring #18280

Inline

• Don't generate a super accessor for an inline method call #17598

Linting

• Wunused: Only use type treverser for checking refinements in refined type trees #17929

Parser

• Add examples taken from reference page #18066
• Test for #18345 #18349

Pattern Matching

• Properly refine type of inlined unapply pattern #18292

Presentation Compiler

• Bugfix: suggest correct arg name completions for lambda expressions #18379
• Improvement: print better bracket suffix in completion item label #18380
• Fix presentation compiler autoimports, update presentation compiler dependencies #18264
• Update scala3-presentation-compiler to 39e349e #18296
• Update presentation compiler with changes from PR 5287 #18301
• Update presentation compiler to a829a6a #18347
• Bugfix: highlight enum cases correctly #18362

Quotes

• Do not beta-reduce/eta-expand pattern splices with contextual function types #18198
• XcheckMacro types of Block expression and Apply/TypeApply function #18242
• Fix owner of splices in class statements #18359
• Handle macro dependencies through class of this #18396
• Add missing span in QuoteMatcher #18178
• Fix stale symbol crashes in some path depended types in macro contexts #18077
• Simplify avoidance of local types of Hole #17571

Reporting

• Detail "not a constant type" message #17626
• Suggest imports for the expected type of the underlying implicit not found error #17976
• Fix: report correct location on a repeat modifier #17982
• Warn when calling synchronized on AnyVal #18021
• Fix compile error message in wildcard exports #18189
• Improve parameter type inference error messaging #18190
• Don't report warnings in migration when performing rewrites #15589
• Fix crash reporter, units and phases #17754
• Omit more prefixes in non-package module printing #17758
• Fix pretty printer to handle using and erased modifier #17952
• Add -Yprint-tasty compiler flag #17986
• Add actionable item to PatternMatchExhaustivity diagnostic #18314

Scaladoc

• Fix: -no-link-warnings does not work #17028
• Fix: Validation for API link #17099
• Scaladoc: type rendering fixes and improvements #17213
• Feat: Add a custom icon #17241
• Fix: Correction of the siteRoot path #17297
• Fix: Correct the navigation to anchor #17910
• Fix: Style for wiki syntax #18079
• Fix NoSuchElementException in scaladoc #18184

SemanticDB

• Check for primary constructor in namePresentInSource #18325
• Add -semanticdb-text compiler option #18307

Typer

• Fix pattern generation in "ordinal" mirror method #17570
• Fix superType of SuperType #17574
• Avoid crash in erasure when reference cannot be emitted #18056
• Disallow overloading from breaking stable patterns #18327
• Fix widen types before checking an implicit view exists #18719
• Properly handle SAM types with wildcards #18201
• Handle recursion in collectParts #18214
• Allow eta-expansion of inline defs #18249
• Stable names for lambda lifted methods #18281

Contributors

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

According to git shortlog -sn --no-merges 3.3.1..3.3.2-RC1 these are:

    37 Nicolas Stucki
    36 Paweł Marks
    28 Chris Kipp
    15 Sébastien Doeraene
    13 Lucas Leblanc
    13 Martin Odersky
    12 Guillaume Martres
    10 Dale Wijnand
    10 Jamie Thompson
     8 ghostbuster91
     6 Florian3k
     5 Kacper Korban
     4 Jędrzej Rochala
     4 Katarzyna Marek
     4 Quentin Bernet
     3 Jan Chyb
     3 Lucas
     3 Matt Bovel
     3 Seth Tisue
     2 Julien Richard-Foy
     2 Wojciech Mazur
     1 Aleksey Troitskiy
     1 Arnout Engelen
     1 Bjorn Regnell
     1 Eugene Yokota
     1 Justin Reardon
     1 Kisaragi
     1 Martin Kučera
     1 Matthew Rooney
     1 Matthias Kurz
     1 Ondrej Lhotak
     1 Rikito Taniguchi
     1 Stefan Wachter
     1 Yuito Murase
     1 rochala

3.3.1

Highlights of the release

• Support records in JavaParsers #16762
• Port JVM backend refactor from Scala 2 #15322

Other changes and fixes

Backend

• Disallow mixins where super calls bind to vals #16908
• Fix #15107: Avoid re-emitting a LineNumber after only LabelNodes. #16813

Coverage

• Fix #17042: Preserve the shape of secondary ctors in instrumentCoverage. #17111

Default parameters

• Dupe fix when finding default arg getters #17058

Documentation

• Fix: ensure syntax blocks for ebnf are marked as such #16837

Erasure

• Handle @companionClass and @companionMethod meta-annotations #17091

Extension Methods

• Support extension methods imported from different objects #17050

GADTs

• Fix tuple member selection so it works with GADT healing #16766
• Fix upper bound constraints, that are higher-kinded #16744
• Split out immutable GadtConstraint #16602

Implicits

• Improve subtyping check for not yet eta-expanded higher kinded types #17139
• Harden tpd.Apply/TypeApply in case of errors #16887
• Try to be more subtle when inferring type parameters of class parents #16896
• Include P in the implicit scope of P.this.type #17088

Incremental Compilation

• Fix under-compilation when the method type in a SAM changes #16996

Infrastructure

• Set reference version to 3.3.0-RC6 #17504
• Fix #17119: Download Coursier from GitHub directly #17141

Inline

• Remove NamedArg from inlined arguments #17228
• Don't generate a Select for a TermRef with NoPrefix #16754
• Prepare bodies of inline forwarders eagerly #16757
• Do not remove inline method implementations until PruneErasedDefs #17408

Java Interop

• ClassfileParser: allow missing param names (for JDK 21) #17536

Linting

• Improve -Wunused: locals, privates with unset vars warning #16639 #17160
• Fix wunused false positive when deriving alias type #17157
• Port -Wnonunit-statement setting for dotty #16936

Match Types

• Normalize match type usage during implicit lookup #17457
• Fix #13757: Explicitly disallow higher-kinded scrutinees of match types. #17322
• Fix match type reduction with wildcard type arguments #17065
• Fix check whether classtag can be generated for match types #16708

Parser

• Allow lines starting with . to fall outside previous indentation widths #17056

Pattern Matching

• Fix #11541: Specialize ClassTag[T] in exhaustivity check #17385
• Check outer class prefixes in type projections when pattern matching #17136
• Make unchecked cases non-@unchecked and non-unreachable #16958
• Fix #16899: Better handle X instanceOf P where X is T1 | T2 #17382

Pickling

• ClassfileParser: Avoid cycle when accessing companion in inner class lookup #16882

Polyfunctions

• Fix type aliases in beta-reduction of polyfunctions #17054

Quotes

• Register paramProxy and thisProxy in Quote type #17541
• Only check newVal/newMethod privateWithin on -Xcheck-macros #17437
• Unencode quote and splice trees #17342
• Correctly type Expr.ofTupleFromSeq for arity > 22 #17261
• Use TermRef to distinguish distinct Type[T] instances #17205
• Check level consistency of SingletonTypeTree as a type #17209
• Fix splice type variable pattern detection #17048
• Avoid creation of @SplicedType quote local refrences #17051
• Dealias type references when healing types in quotes #17049
• Replace quoted type variables in signature of HOAS pattern result #16951
• Beta-reduce directly applied PolymorphicFunction #16623
• Use Object.toString for quoted.{Expr, Type} #16663
• Fix Splicer.isEscapedVariable #16838
• Fix references to class members defined in quotes #17107
• Handle pickled forward references in pickled expressions #16855
• Fix #16615 - crashes of path dependent types in spliced Type.of #16773
• Disallow local term references in staged types #16362
• Refactor level checking / type healing logic #17082
• Dealias quoted types when staging #17059
• Fix quotes with references to path dependent types #17081
• Make arguments order in quote hole deterministic #17405
• Only transform the body of the quote with QuoteTransformer #17451
• Place staged type captures in Quote AST #17424
• Add SplicePattern AST to parse and type quote pattern splices #17396

Reflection

• -Xcheck-macros: add hint when a symbol in created twice #16733
• Assert that symbols created using reflect API have correct privateWithin symbols #17352
• Fix reflect.LambdaType type test #16972
• Improve New/Select -Ycheck message #16746
• Improve error message for CyclicReference in macros #16749
• Add reflect defn.FunctionClass overloads #16849

REPL

• Always load REPL classes in macros including the output directory #16866

Reporting

• Improve missing argument list error #17126
• Improve implicit parameter error message with aliases #17125
• Improve "constructor proxy shadows outer" handling #17154
• Clarify ambiguous reference error message #16137
• Hint about forbidden combination of implicit values and conversions #16735
• Attach explanation message to diagnostic message #16787
• Propagate implicit search errors from implicit macros #16840
• Detail UnapplyInvalidReturnType error message #17167
• Add way to debug -Xcheck-macros tree checking #16973
• Enrich and finesse compiler crash reporting #17031
• Allow @implicitNotFound messages as explanations #16893
• Include top-level symbols from same file in outer ambiguity error #17033
• Do not issue deprecation warnings when declaring deprecated case classes #17165

Scala-JS

• Fix #17344: Make implicit references to this above dynamic imports explicit. #17357
• Fix #12621: Better error message for JS trait ctor param. #16811
• Fix #16801: Handle Closure's of s.r.FunctionXXL. #16809
• Fix #17549: Unify...

3.3.1-RC7

Backported fixes

• Tweak selection from self types #18467
• Revert "Add reflect defn.FunctionClass overloads" #18473

Contributors

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

According to git shortlog -sn --no-merges 3.3.1-RC6..3.3.1-RC7 these are:

     3	Paweł Marks
     1	Martin Odersky

3.3.1-RC6

Backported fixes

• Refine infoDependsOnPrefix #18204
• FDo not compute protoFormal if param.tpt is empty #18288
• Revert "Normalize match type usage during implicit lookup" #18440

Contributors

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

According to git shortlog -sn --no-merges 3.3.1-RC5..3.3.1-RC6 these are:

     3	Paweł Marks
     2	Martin Odersky
     1	Nicolas Stucki

3.3.1-RC5

Backported fixes

• Heal stage inconsistent prefixes of type projections #18239
• Fix regression #17245: Overloaded methods with ClassTags #18286
• Disallow taking singleton types of packages again #18232
• A slightly more conservative version of #14218 #18352
• Record failures to adapt application arguments #18269
• Fix regression in exhaustivity of HK types #18303

Contributors

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

According to git shortlog -sn --no-merges 3.3.1-RC4..3.3.1-RC5 these are:

     5 Dale Wijnand
     2 Martin Odersky
     2 Paweł Marks
     1 Jan Chyb
     1 Nicolas Stucki

3.3.1-RC4

Backported fixes

• Revert "Include top-level symbols from same file in outer ambiguity error" #17438

Contributors

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

According to git shortlog -sn --no-merges 3.3.1-RC3..3.3.1-RC4 these are:

     2 Paweł Marks
     1 Nicolas Stucki

3.3.1-RC3

Backported fixes

• Add clause for protected visibility from package objects #18134

Contributors

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

According to git shortlog -sn --no-merges 3.3.1-RC2..3.3.1-RC3 these are:

     2 Paweł Marks
     1 Martin Odersky

3.3.1-RC2

Backported fixes

• Dealias types in `New`` before matching quotes #17615
• Fix accessibleType for package object prefixes #18057

Contributors

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

According to git shortlog -sn --no-merges 3.3.1-RC1..3.3.1-RC2 these are:

     2 Martin Odersky
     2 Paweł Marks
     1 Nicolas Stucki

3.3.1-RC1

Highlights of the release

• Support records in JavaParsers #16762
• Port JVM backend refactor from Scala 2 #15322

Other changes and fixes

Backend

• Disallow mixins where super calls bind to vals #16908
• Fix #15107: Avoid re-emitting a LineNumber after only LabelNodes. #16813

Coverage

• Fix #17042: Preserve the shape of secondary ctors in instrumentCoverage. #17111

Default parameters

• Dupe fix when finding default arg getters #17058

Documentation

• Fix: ensure syntax blocks for ebnf are marked as such #16837

Erasure

• Handle @companionClass and @companionMethod meta-annotations #17091

Extension Methods

• Support extension methods imported from different objects #17050

GADTs

• Fix tuple member selection so it works with GADT healing #16766
• Fix upper bound constraints, that are higher-kinded #16744
• Split out immutable GadtConstraint #16602

Implicits

• Improve subtyping check for not yet eta-expanded higher kinded types #17139
• Harden tpd.Apply/TypeApply in case of errors #16887
• Try to be more subtle when inferring type parameters of class parents #16896
• Include P in the implicit scope of P.this.type #17088

Incremental Compilation

• Fix under-compilation when the method type in a SAM changes #16996

Infrastructure

• Set reference version to 3.3.0-RC6 #17504
• Fix #17119: Download Coursier from GitHub directly #17141

Inline

• Remove NamedArg from inlined arguments #17228
• Don't generate a Select for a TermRef with NoPrefix #16754
• Prepare bodies of inline forwarders eagerly #16757
• Do not remove inline method implementations until PruneErasedDefs #17408

Java Interop

• ClassfileParser: allow missing param names (for JDK 21) #17536

Linting

• Improve -Wunused: locals, privates with unset vars warning #16639 #17160
• Fix wunused false positive when deriving alias type #17157
• Port -Wnonunit-statement setting for dotty #16936

Match Types

• Normalize match type usage during implicit lookup #17457
• Fix #13757: Explicitly disallow higher-kinded scrutinees of match types. #17322
• Fix match type reduction with wildcard type arguments #17065
• Fix check whether classtag can be generated for match types #16708

Parser

• Allow lines starting with . to fall outside previous indentation widths #17056

Pattern Matching

• Fix #11541: Specialize ClassTag[T] in exhaustivity check #17385
• Check outer class prefixes in type projections when pattern matching #17136
• Make unchecked cases non-@unchecked and non-unreachable #16958
• Fix #16899: Better handle X instanceOf P where X is T1 | T2 #17382

Pickling

• ClassfileParser: Avoid cycle when accessing companion in inner class lookup #16882

Polyfunctions

• Fix type aliases in beta-reduction of polyfunctions #17054

Quotes

• Register paramProxy and thisProxy in Quote type #17541
• Only check newVal/newMethod privateWithin on -Xcheck-macros #17437
• Unencode quote and splice trees #17342
• Correctly type Expr.ofTupleFromSeq for arity > 22 #17261
• Use TermRef to distinguish distinct Type[T] instances #17205
• Check level consistency of SingletonTypeTree as a type #17209
• Fix splice type variable pattern detection #17048
• Avoid creation of @SplicedType quote local refrences #17051
• Dealias type references when healing types in quotes #17049
• Replace quoted type variables in signature of HOAS pattern result #16951
• Beta-reduce directly applied PolymorphicFunction #16623
• Use Object.toString for quoted.{Expr, Type} #16663
• Fix Splicer.isEscapedVariable #16838
• Fix references to class members defined in quotes #17107
• Handle pickled forward references in pickled expressions #16855
• Fix #16615 - crashes of path dependent types in spliced Type.of #16773
• Disallow local term references in staged types #16362
• Refactor level checking / type healing logic #17082
• Dealias quoted types when staging #17059
• Fix quotes with references to path dependent types #17081
• Make arguments order in quote hole deterministic #17405
• Only transform the body of the quote with QuoteTransformer #17451
• Place staged type captures in Quote AST #17424
• Add SplicePattern AST to parse and type quote pattern splices #17396

Reflection

• -Xcheck-macros: add hint when a symbol in created twice #16733
• Assert that symbols created using reflect API have correct privateWithin symbols #17352
• Fix reflect.LambdaType type test #16972
• Improve New/Select -Ycheck message #16746
• Improve error message for CyclicReference in macros #16749
• Add reflect defn.FunctionClass overloads #16849

REPL

• Always load REPL classes in macros including the output directory #16866

Reporting

• Improve missing argument list error #17126
• Improve implicit parameter error message with aliases #17125
• Improve "constructor proxy shadows outer" handling #17154
• Clarify ambiguous reference error message #16137
• Hint about forbidden combination of implicit values and conversions #16735
• Attach explanation message to diagnostic message #16787
• Propagate implicit search errors from implicit macros #16840
• Detail UnapplyInvalidReturnType error message #17167
• Add way to debug -Xcheck-macros tree checking #16973
• Enrich and finesse compiler crash reporting #17031
• Allow @implicitNotFound messages as explanations #16893
• Include top-level symbols from same file in outer ambiguity error #17033
• Do not issue deprecation warnings when declaring deprecated case classes #17165

Scala-JS

• Fix #17344: Make implicit references to this above dynamic imports explicit. #17357
• Fix #12621: Better error message for JS trait ctor param. #16811
• Fix #16801: Handle Closure's of s.r.FunctionXXL. #16809
• Fix #17549: Unify...

3.3.0

Highlights of the release

• Stabilize new lazy vals #16614
• Experimental Macro annotations #16392 #16454 #16534
• Fix stability check for inline parameters #15511
• Make fewerBraces a standard feature #16297
• Add new front-end phase for unused entities and add support for unused imports #16157
• Implement -Wvalue-discard warning #15975
• Introduce boundary/break control abstraction. #16612

Other changes and fixes

Annotations

• Support use-site meta-annotations #16445

Desugaring

• Reuse typed prefix for applyDynamic and applyDynamicNamed #16552
• Fix object selftype match error #16441

Erasure

• Dealias before checking for outer references in types #16525
• Fix generic signature for type params bounded by primitive #16442
• Avoid EmptyScope.cloneScope crashing, eg on missing references #16314

GADTs

• Inline GADT state restoring in TypeComparer #16564
• Add extension/conversion to GADT selection healing #16638
• Split out immutable GadtConstraint #16602
• Avoid bidirectional GADT typebounds from fullBounds #15683

Incremental compilation

• Unpickle arguments of parent constructors in Templates lazily #16688

Initialization

• Fix #16438: Supply dummy args for erroneous parent call in init check #16448

Inline

• Dealias in ConstantValue, for inline if cond #16652
• Set Span for top level annotations generated in PostTyper #16378
• Interpolate any type vars from comparing against SelectionProto #16348
• Handle binding of beta reduced inlined lambdas #16377
• Do not add dummy RHS to abstract inline methods #16510
• Warn on inline given aliases with functions as RHS #16499
• Support inline overrides in value classes #16523

Java interop

• Represent Java annotations as interfaces so they can be extended, and disallow various misuses of them #16260

Linting

• Fix -Wunused:import registering constructor <init> instead of its owner (also fix false positive for enum) #16661
• Fix #16675 : -Wunused false positive on case class generated method, due to flags used to distinguish case accessors. #16683
• Fix #16682: CheckUnused missed some used symbols #16690
• Fix "-Wunused: False positive on parameterless enum member" #16927
• Register usage of symbols in non-inferred type trees in CheckUnused #16939
• Traverse annotations instead of just registering in -Wunused #16956
• Ignore parameter of accessors in -Wunused #16957
• Ignore parameter of accessors in -Wunused #16957
• Improve override detection in CheckUnused #16965
• WUnused: Fix unused warning in synthetic symbols #17020
• Fix WUnused with idents in derived code #17095
• WUnused: Fix for symbols with synthetic names and unused transparent inlines #17061
• Skip extension method params in WUnused #17178
• Fix wunused false positive when deriving alias type #17157
• Fix WUnused for accessible symbols that are renamed #17177
• Fix WUnused false positive in for #17176
• Make CheckUnused run both after Typer and Inlining #17206
• Disable WUnused for params of non-private defs #17223
• Wunused: Check if symbol exists before isValidMemberDef check #17316
• Wunused: Include import selector bounds in unused checks #17323
• Fix compiler crash in WUnused #17340

Opaque Types

• Delay opaque alias checking until PostTyper #16644

Overloading

• Handle context function arguments in overloading resolution #16511

Parser

• Improve support for Unicode supplementary characters in identifiers and string interpolation (as in Scala 2) #16278
• Require indent after colon at EOL #16466
• Help givens return refined types #16293

Pattern Matching

• Tweak AvoidMap's derivedSelect #16563
• Space: Use RHS of & when refining subtypes #16573
• Freeze constraints in a condition check of maximiseType #16526
• Restrict syntax of typed patterns #16150
• Test case to show that #16252 works with transparent #16262
• Support inline unapplySeq and with leading given parameters #16358
• Handle sealed prefixes in exh checking #16621
• Detect irrefutable quoted patterns #16674
• Patmat: Use less type variables in prefix inference #16827

Pickling

• Allow case classes with up to 254 parameters #16501
• Correctly unpickle Scala 2 private case classes in traits #16519

Polyfunctions

• Fix #9996: Crash with function accepting polymorphic function type with singleton result #16327

Quotes

• Remove contents of inline methods #16345
• Fix errors in explicit type annotations in inline match cases #16257
• Handle macro annotation suspends and crashes #16509
• Fix macro annotations spliceOwner #16513
• Fix HK quoted pattern type variables #16907

REPL

• REPL: Fix crash when printing instances of value classes #16393
• Attempt to fix completion crash #16267
• Fix REPL shadowing bug #16389
• Open up for extensibility #16276
• Don't crash if completions throw #16687

Reflection

• Fix reflect typeMembers to return all members #15033
• Deprecate reflect Flags.Static #16568

Reporting

• Suppress follow-on errors for erroneous import qualifiers #16658
• Fix order in which errors are reported for assignment to val #16660
• Fix class name in error message #16635
• Make refined type printing more source compatible #16303
• Add error hint on local inline def used in quotes #16572
• Fix Text wrapping #16277
• Fix #16680 by registering Ident not containing a symbol #16689
• Fix the non-miniphase tree traverser #16684
• Just warn on type ascription on a pattern #17454

Scala-JS

• Fix #14289: Accept Ident refs to js.native in native member rhs. #16185

Scaladoc

• Added jpath check to `ClassLi...