3.2.2-RC1

Highlights of the release

• Make truncation by characters in repl configurable #16167
• New (experimental for now) lazy vals implementation #15296

Other changes and fixes

Coverage

• Make coverage instrumentation more robust #16235

Default parameters

• Resolve overloading: keep track of prefix and indices of all default getters #16009

Experimentals

• Let accessors inherit @experimental annotations from accessed symbols #16099

Extension Methods

• Fix i14451 #16010

GADTs

• Add fixed GADT exhaustivity test cases #16169
• Eliminate class hierarchy in GadtConstraint #16194

Initialization

• Code refactoring of initialization checker #16066

Inline

• Refine checking for outer references #16122

Java interoperability

• Parse native in Java bytecode as @Native #16232

Opaque Types

• Disallow opaque type aliases of context functions #16041

Parser

• Align implementation with spec of soft modifiers #15961

Pattern Matching

• Fix redundancy (unreachability) warning #16179

Polyfunctions

• Avoid checking purity of Apply without symbols #16221

Reporting

• Expose reason for unchecked warning #16086
• Refine AsSeenFrom approximation scheme #15957
• Better output under -Ydetailed-stats #15950
• Fix crash in -Vprofile code #16007
• Name stripped of module suffix must not be empty #15597
• Fix InlineMatch pos for summonFrom #16025

Rewrites

• Rewrites are UTF-8 #15622

Scala-JS

• Fix the detection of inferred types of = js.native. #16184
• Do not elide fields required for Scala.js interop semantics. #16187

Scaladoc

• Update quick links for new ui #15912
• Avoid parsing code comment twice #16154
• Make footer text configurable #16064
• Add typography fallback fonts #16063

SemanticDB

• Emit SymbolInformation and Occurrence for anonymous class #15865
• Fix regression in type apply synthetics #16031

Transform

• Fix creating forwarders for simple alias givens #16193
• Only check for Scala2LocalSuffix in methods on Scala2x classes #16014
• Fix mapping TypeMaps over annotations #15948
• Peephole optimization to drop .apply from partially applied methods #16022

Typer

• Fix approximateOr of (A & Double) | Null #16241
• Create boxed environments only for references and function values #16136
• Fix higher-order unification incorrectly substituting tparams #16181
• Handle copies of constrained type lambdas when determining an implicit scope #16159
• Create message for missing arguments #16158
• Make singleton types subtypes of their refined type #16135
• Disallow overriding val parameters #16096
• Avoid crash where creator proxies are referenced indirectly #16098
• Refine estimation of default arguments in overloading resolution #15962
• Harden canAssign #15963
• Fix isSubType for static objects filling in type projections #15959
• Fix expected type of TupleXXL unapply #16248
• Drop lazy recursive application in approximateParent #16073
• Type match with a match type when a match type is expected #15599

Contributors

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

According to git shortlog -sn --no-merges 3.2.1..3.2.2-RC1 these are:

    83  Martin Odersky
    24  Yichen Xu
    23  Quentin Bernet
    18  Michael Pollmeier
    17  Dale Wijnand
     8  Fengyun Liu
     8  Paweł Marks
     7  Guillaume Raffin
     6  Som Snytt
     6  Szymon Rodziewicz
     5  Kacper Korban
     4  Chris Kipp
     3  Matt Bovel
     3  Rikito Taniguchi
     2  Ben Hutchison
     2  Florian3k
     2  Guillaume Martres
     2  Jamie Thompson
     2  João Costa
     2  Julien Richard-Foy
     2  Lukas Rytz
     2  Sébastien Doeraene
     1  Anton Sviridov
     1  Gabriel Volpe
     1  Liang Yan
     1  Noah Rosamilia
     1  Ondra Pelech
     1  Seth Tisue
     1  Tomasz Godzik
     1  Vadim Chelyshov
     1  nmc.borst
     1  nmcb
     1  olsdavis

3.2.1

Highlights of the release

• Add experimental capture checking #15877
• Scaladoc: New UI design #15697

Other changes and fixes

Backend

• Set ACC_FINAL access flag to final variable accessors #15707

Coverage

• Avoid instrumentation of inline and erased definitions #15504

Erasure

• Fix #15199: Exclude JavaDefined Modules from bridge generation. #15499

Extension Methods

• Merge nested polytypes in more cases in resolveOverloaded #15636

GADTs

• Fix GADT casting when typing if expressions #15646
• Use GADT constraints in maximiseType #15544
• Add the expected type to Poly's desugaring #15570
• Allow refineUsingParent to infer GADT bounds #15706
• Avoid leaking internal types in GadtConstraint.approximation #15558
• Improve GADT usage tracing for MatchType reduction #15872
• Add gadtAddBound to ExplainingTypeComparer tracing #15819
• Avoid adding NoSymbol to gadt constraints in TypeOps.instantiateToSubType #15965

IDE Support

• Recover from TypeErrors in isErroneous #15442
• Add a guard against empty ident #15542

Initialization

• Fix #15465: Use resolveThis for outerSelect resolution #15606
• Fix #15459: Display uninitialized fields in promotion error #15488
• Fix #15363: Improve error messages for leaking of this #15364
• Make sure inner classes are checked first #15527
• Handle super accessors in initialization checker #15703

Inline

• Check is inline unapply has leading implicits #15583
• Fix #15374: Make sure prefix of outer select has the correct class symbol #15592

Java Interoperability

• Don't check import selectors for Java code #15617

JS Interoperability

• Fix #15701: Implement js.dynamicImport for dynamic module loading. #15720
• Implement support for js.new.target. #15734
• Fix #14488: Scala.js: Add compiler support for scala.Enumeration. #15770

Match Types

• Avoid null types when reducing match types #15748
• Avoid references to unbound parameters in applied type patterns #15710

Nullability

• Fix checking ctx to carry correct modes #15350

Pattern Matching

• Teach provablyDisjoint to handle FromJavaObject #15769
• Don't trust case class extractors with explicit type arguments #15669
• Space: Fix how sealed abstract classes decompose #15553
• Local classes are uncheckable (type tests) #15134
• Fix ValDef span assignment in PatternMatcher #15783
• Reject all explicitly written type references with bad bounds #15577

Pickling

• Make simplify replace type parameters inside method types #15430

Quotes

• Ignore types in macro runtime dependencies #15529

REPL

• ReplDriver.run and :load take complete input #15811
• REPL goes through a phase #15663
• Avoid assertion failure for illegal trait inheritance #15631

Reporting

• Underline assignment correctly in error message #15584
• Better error message for "implicit search must be more specific" #15747
• Provide better info on compiler crashes #15890

SemanticDB

• Handle colons in file names when producing SemanticDB #15863

Standard Library

• Fix throwReturn of NonLocalReturns to allow wider usage #15495
• Update Scala 2 library dependency to 2.13.10 #16074

Tooling

• Fix scala runner exit codes #15604
• Command line parser respects outer escaped quote #15497
• Added quotes to Scala home paths in scala and scalac scripts #15824
• Retain partial type params typying information on error #15825

Transform

• Implementation restriction: No partial functions with CFT results #15744
• Fix treatment of parameter selections via this in constructors. #15737
• Fix expansion and unexpansion of mixin qualified names #15712
• Fix #15514 in Parser #15524
• Check type arguments for bad bounds #15571

Typer

• Fix swapKey #15894
• Insert GADT casts for needy match types #15851
• Add missing dealias in isContextFunctionRef #15742
• Look for synthetic applies also under type applications #15572
• Optimize isSameType for invariant applied types with the same structure #15556
• Fix cycle detection for type aliases with wildcard arguments #15508
• Handle recursions in isFullyDefined #15443
• Do level checking on instantiation #15746
• Use fullyDefinedType for mirror synthesis #15814
• Instantiate more type variables to hard unions #15632
• Simplify level fixing scheme #15936
• Don't normalize in AppliedType#superType #15453
• Try promotion while widening arguments #15467
• Check import selectors at Typer #15477
• Turn some calls to underlying into superType. #15455
• Find more looping implicits #15481
• Fix findFunctionType for OrTypes #15478
• Fix looping implicits check #15655
• Try to avoid static symbols if leaving them would make a leak #15548
• Do not fold IsConst applied to dependent parameters #15759
• Only look for synthetic applies under TypeApply with inferred arguments #15970
• Improvements for implicit searches with top-level type variables #16001
• Better types for class type parameters #15951
• Fix tuple casting #16113
• Be even more careful when combining argument and info in computeAsSeenFrom #16070
• Be still more careful when computing denotations of class parameters #16112

Contributors

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

According to git shortlog -sn --no-merges 3.2.0..3.2.1 these are:

   215 Martin Odersky
    94 Filip Łukasik
    69 Fengyun Liu
    57 Filip Zybała
    31 Dale Wijnand
    16 Paweł Marks
    14 Sébastien Doeraene
    10 Guillaume Raffin
     9 rochala
     8 Chris Kipp
     8 Som Snytt
     7 Jędrzej Rochala
     7 Nicolas Stucki
     7 Yichen Xu
     6 Jamie Thompson
     6 Tom Grigg
     5 Kacper Korban
     5 noti0na1
     2 Arman Bilge
     2 Matt Bovel
     2 Ondrej Lhotak
     2 Quentin Bernet
     2 Seth Tisue
     2 Tomasz Godzik
     1 Adrien Piquerez
     1 Florian3k
     1 Gagandeep Kalra
     1 Jentsch
     1 Kieren Dav...

3.2.1-RC4

Backported fixes

• Update Scala 2 library dependency to 2.13.10 #16074

Contributors

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

According to git shortlog -sn --no-merges 3.2.1-RC3..3.2.1-RC4 these are:

     2  Paweł Marks
     1  Seth Tisue

3.2.1-RC3

Backported fixes

• Fix tuple casting #16113
• Be even more careful when combining argument and info in computeAsSeenFrom #16070
• Be still more careful when computing denotations of class parameters #16112

Contributors

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

According to git shortlog -sn --no-merges 3.2.1-RC2..3.2.1-RC3 these are:

     4  Martin Odersky
     2  Paweł Marks

3.2.1-RC2

Backported fixes

• Only look for synthetic applies under TypeApply with inferred arguments #15970
• Improvements for implicit searches with top-level type variables #16001
• Better types for class type parameters #15951
• Avoid adding NoSymbol to gadt constraints in TypeOps.instantiateToSubType #15965

Contributors

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

According to git shortlog -sn --no-merges 3.2.1-RC1..3.2.1-RC2 these are:

     7  Martin Odersky
     3  Kacper Korban
     2  Paweł Marks

3.2.1-RC1

Highlights of the release

• Add experimental capture checking #15877
• Scaladoc: New UI design #15697

Other changes and fixes

Backend

• Set ACC_FINAL access flag to final variable accessors #15707

Coverage

• Avoid instrumentation of inline and erased definitions #15504

Erasure

• Fix #15199: Exclude JavaDefined Modules from bridge generation. #15499

Extension Methods

• Merge nested polytypes in more cases in resolveOverloaded #15636

GADTs

• Fix GADT casting when typing if expressions #15646
• Use GADT constraints in maximiseType #15544
• Add the expected type to Poly's desugaring #15570
• Allow refineUsingParent to infer GADT bounds #15706
• Avoid leaking internal types in GadtConstraint.approximation #15558
• Improve GADT usage tracing for MatchType reduction #15872
• Add gadtAddBound to ExplainingTypeComparer tracing #15819

IDE Support

• Recover from TypeErrors in isErroneous #15442
• Add a guard against empty ident #15542

Initialization

• Fix #15465: Use resolveThis for outerSelect resolution #15606
• Fix #15459: Display uninitialized fields in promotion error #15488
• Fix #15363: Improve error messages for leaking of this #15364
• Make sure inner classes are checked first #15527
• Handle super accessors in initialization checker #15703

Inline

• Check is inline unapply has leading implicits #15583
• Fix #15374: Make sure prefix of outer select has the correct class symbol #15592

Java Interoperability

• Don't check import selectors for Java code #15617

JS Interoperability

• Fix #15701: Implement js.dynamicImport for dynamic module loading. #15720
• Implement support for js.new.target. #15734
• Fix #14488: Scala.js: Add compiler support for scala.Enumeration. #15770

Match Types

• Avoid null types when reducing match types #15748
• Avoid references to unbound parameters in applied type patterns #15710

Nullability

• Fix checking ctx to carry correct modes #15350

Pattern Matching

• Teach provablyDisjoint to handle FromJavaObject #15769
• Don't trust case class extractors with explicit type arguments #15669
• Space: Fix how sealed abstract classes decompose #15553
• Local classes are uncheckable (type tests) #15134
• Fix ValDef span assignment in PatternMatcher #15783
• Reject all explicitly written type references with bad bounds #15577

Pickling

• Make simplify replace type parameters inside method types #15430

Quotes

• Ignore types in macro runtime dependencies #15529

REPL

• ReplDriver.run and :load take complete input #15811
• REPL goes through a phase #15663
• Avoid assertion failure for illegal trait inheritance #15631

Reporting

• Underline assignment correctly in error message #15584
• Better error message for "implicit search must be more specific" #15747
• Provide better info on compiler crashes #15890

SemanticDB

• Handle colons in file names when producing SemanticDB #15863

Standard Library

• Fix throwReturn of NonLocalReturns to allow wider usage #15495

Tooling

• Fix scala runner exit codes #15604
• Command line parser respects outer escaped quote #15497
• Added quotes to Scala home paths in scala and scalac scripts #15824
• Retain partial type params typying information on error #15825

Transform

• Implementation restriction: No partial functions with CFT results #15744
• Fix treatment of parameter selections via this in constructors. #15737
• Fix expansion and unexpansion of mixin qualified names #15712
• Fix #15514 in Parser #15524
• Check type arguments for bad bounds #15571

Typer

• Fix swapKey #15894
• Insert GADT casts for needy match types #15851
• Add missing dealias in isContextFunctionRef #15742
• Look for synthetic applies also under type applications #15572
• Optimize isSameType for invariant applied types with the same structure #15556
• Fix cycle detection for type aliases with wildcard arguments #15508
• Handle recursions in isFullyDefined #15443
• Do level checking on instantiation #15746
• Use fullyDefinedType for mirror synthesis #15814
• Instantiate more type variables to hard unions #15632
• Simplify level fixing scheme #15936
• Don't normalize in AppliedType#superType #15453
• Try promotion while widening arguments #15467
• Check import selectors at Typer #15477
• Turn some calls to underlying into superType. #15455
• Find more looping implicits #15481
• Fix findFunctionType for OrTypes #15478
• Fix looping implicits check #15655
• Try to avoid static symbols if leaving them would make a leak #15548
• Do not fold IsConst applied to dependent parameters #15759

Contributors

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

According to git shortlog -sn --no-merges 3.2.0..3.2.1-RC1 these are:

   204 Martin Odersky
    94 Filip Łukasik
    69 Fengyun Liu
    57 Filip Zybała
    31 Dale Wijnand
    14 Sébastien Doeraene
    10 Guillaume Raffin
     9 rochala
     8 Chris Kipp
     8 Paweł Marks
     8 Som Snytt
     7 Jędrzej Rochala
     7 Nicolas Stucki
     7 Yichen Xu
     6 Jamie Thompson
     6 Tom Grigg
     5 noti0na1
     2 Arman Bilge
     2 Kacper Korban
     2 Matt Bovel
     2 Ondrej Lhotak
     2 Quentin Bernet
     2 Tomasz Godzik
     1 Adrien Piquerez
     1 Florian3k
     1 Gagandeep Kalra
     1 Jentsch
     1 Kieren Davies
     1 Michał Pałka
     1 Naveen
     1 Oron Port
     1 Rubin Simons
     1 Seth Tisue
     1 Wojciech Mazur
     1 esteban marin
     1 naveen

3.2.0

Highlights of the release

• Add runtime.TupleMirror to avoid anonymous classes for mirrors of tuples #15404
• Fix TupleXXL.productPrefix #15411
• Synthesize mirrors for small generic tuples #15250
• Fix #14150: Constrain refinements to type parameters #15014
• Gradual warning for deprecated nonlocal return #15303
• Restrict mirrors of any union type #15279
• Stabilize 3.2 APIs #15197
• Add error reporting for mirror synthesis #15164
• Fix #14432: Check if scala 2 case class is accessible #15008
• Fix #12919: Summon anonymous mirror when companion is a case object #14986
• Erase Int | Nothing signatures types into Int #14971
• Allow exports in extension clauses #14497
• Fix Scala Wart about implicit () class parameters #14840
• Re-architecture quote pickling #12540
• Add scala.annotation.MainAnnotation #14558
• Add in initial support for code coverage #13880
• Support tuple specialisation #15060
• Remove support for -scala-output-version flag #15146
• Make lazy vals and object native image friendly #14780
• Allow return in tailrec position #14067

Other changes and fixes

Backend

• Keep annotation order #15063
• Update asm to 9.3 #14926
• Fix #14773: Reuse the param slots for the tailrec local mutable vars. #14865
• Better error messages in case of TooLarge* exceptions in GenBCode #14943

Coverage

• Fix relativizing paths in coverage serializer #15240
• Fix lifting of arguments with -coverage-out #15530
• Avoid instrumentation of inline and erased definitions #15504
• Keep fun and args together when instrumenting TypeApply for coverage #15739

Erasure

• Handle & and | types when computing tuple arity #15330
• Fix two problems related to match types as array elements #15625

Experimentals

• Fix check experimental inline references #15147

Exports

• Refine criterion when to skip identifiers in pattern constructors #15367
• Simplify and harden duplicates checking in exports #14879
• Fix isAbsType prediction in TreeUnpickler #14861

F-bounds

• Recursion brake for joins in TypeComparer #14880

GADTs

• Heal pattern-bound type by gathering constraints #15095
• Consider GADT upper bounds when upcasting the scrutinee type #15351
• Extract wildcard GADT constraints more directly #14832
• Fix constraining against HKTypeLambda arguments #15688

IDE Support

• Docs: Add a comment to pathTo mentioning that it might return errorTermTree #15420
• Fix completions to properly contain public fields if they were shadowed #15236
• Add proper signatureHelp for unapply methods #15203
• Fix signatureHelp to show enclosing apply instead of closest one. #15119
• Fix implicit conversion type resolve in completions #15061
• Fix type alias completion, unify completion tests style #15047
• Support code completion for refined types #15283
• Fix SourceFile.column method. #15209

Initialization

• Check method arguments with parametricity when static #14916
• Add safe-init test to prevent adding cold elements to hot arrays #14895
• Allow non-hot values in SeqLiterals #14794

Inline

• Make private inline accessors final #15324
• Fix inlining when outer select is needed from inline call prefix #15327
• Support inline methods calling private inline methods on this #15075
• Types with only an abstract inline method are not SAMs #14874
• Don't issue unreachable error messages for inlined code #14871
• Dealias arg type to detect opaque types #15074
• Fix dependency status calculation for refined type aliases in method result types #15390
• Fix computation of class nesting level in inliner #15671
• Always expand inline accessor names #15619

Java Compatibility

• Java generic signatures can't refer to type members #15093
• Simplify and correctify calculation of the InnerClass attribute #15153
• Fix #13523: Survive missing Java inner annotation classfiles #15094

Match Types

• Implement provablyDisjoint for refined types and type aliases #15375
• Cache skolem types #14909
• Refine Matchtype checking #15423

Nullability

• Speed up .nn #15418
• Fix handling imports in TreeUnpickler #15137
• Honor language imports when unpickling #14962
• Remove special eq/ne in unsafeNulls #15186
• Add eq/ne extension for AnyRef|Null to Scala3RunTime #14632

Parser

• Fix parser error for type arguments with trailing comma #15395
• Change fewerbraces to always use a colon, even before lambdas #15273
• Deprecate 3.1-migration, err on import #14978
• Treat all incomplete ifs as statements #14960
• Clarify and test rules for newline suppression #14877
• Tweak assertion in withMods #14857
• Fix loop in parser #15421
• Parse unary operators as regular identifiers when backquoted #15198
• Harden erasure of TermRefs #15658

Pattern Matching

• Preserve modifiers when desugaring for-comps #15403
• Extract unapply types like typedUnApply #15254
• Force Java enum children to be queried #15109
• Enable stricter pattern binding warnings by default #14294
• Irrefutable for generators don't require withFilter under -source:future #15593
• Refutable extractor may be an Apply tree #15651

Pickling

• Survive unpickling crashes when completing from Tasty #14884

Quotes

• Transform RHS of captured assignment reference #15247
• Properly look for inline methods #15072
• Fix hash code of ExprImpl and TypeImpl #15281
• Compute correct argument type in ExprMap #15269
• Detect quoted pattern variables in alternatives #15073
• Disallow old ...

3.2.0-RC4

Backported fixes

• Refutable extractor may be an Apply tree #15651
• Bump compiler-interface and capture the diagnosticCode #15565
• Support Mirror synthesis for local and inner classes #15847

Contributors

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

According to git shortlog -sn --no-merges $3.2.0-RC3..3.2.0-RC4 these are:

     2  Chris Kipp
     2  Paweł Marks
     1  Jamie Thompson
     1  odersky

3.2.0-RC3

Backported fixes

• Refutable extractor may be an Apply tree #15672
• Fix coverage instrumentation of Java-defined and parameterless methods #15648
• Keep fun and args together when instrumenting TypeApply for coverage #15739
• Fix two problems related to match types as array elements #15625
• Survive TypeErrors in isMatchedBy #15675
• deprecate ToString type which should be deprecated at 3.2.0 #15645
• Fix constraining against HKTypeLambda arguments #15688
• Fix computation of class nesting level in inliner #15671
• Don't ignore expected types of New #15679
• Better infos for dependent class parameter references #15667
• Always expand inline accessor names #15619
• Harden erasure of TermRefs #15658

Contributors

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

According to git shortlog -sn --no-merges $3.2.0-RC2..3.2.0-RC3 these are:

    13  odersky
     5  Guillaume Raffin
     2  Paweł Marks
     2  Tom Grigg
     1  Dale Wijnand
     1  rochala

3.2.0-RC2

Backported fixes

• Handle non-specialized functions in EtaReduce #15498
• Refine Matchtype checking #15423
• Fix lifting of arguments with -coverage-out #15530
• Avoid instrumentation of inline and erased definitions #15504
• Irrefutable for generators don't require withFilter under -source:future #15593

Contributors

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

According to git shortlog -sn --no-merges 3.2.0-RC1..3.2.0-RC2 these are:

     4  Guillaume Raffin
     4  odersky
     2  Paweł Marks
     1  Nicolas Stucki
     1  Sébastien Doeraene
     1  Tom Grigg