3.3.0-RC5

Backported fixes

• Remove experimental from Mirror#fromProductTyped #16829
• Wunused: Check if symbol exists before isValidMemberDef check #17316
• Wunused: Include import selector bounds in unused checks #17323
• Fix compiler crash in WUnused #17340

Contributors

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

According to git shortlog -sn --no-merges 3.3.0-RC4..3.3.0-RC5 these are:

     2 Kacper Korban
     2 Michael Pilquist
     2 Paweł Marks
     2 Szymon Rodziewicz
     1 Matt Bovel

3.3.0-RC4

Backported fixes

• Fix HK quoted pattern type variables #16907
• Fix caching issue caused by incorrect isProvisional check #16989
• Fix race condition in new LazyVals #16975
• 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 -W #16956
• 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

Contributors

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

According to git shortlog -sn --no-merges 3.3.0-RC3..3.3.0-RC4 these are:

    41 Szymon Rodziewicz
     4 Paul Coral
     3 Paweł Marks
     1 Guillaume Martres
     1 Kacper Korban
     1 Nicolas Stucki

3.3.0-RC3

Backported fixes

• Added jpath check to ClassLikeSupport getParentsAsTreeSymbolTuples #16759
• Split out immutable GadtConstraint #16602
• Avoid bidirectional GADT typebounds from fullBounds #15683
• Fix static lazy field holder for GraalVM #16800
• Add support for disabling redirected output in the REPL driver for usage in worksheets in the Scala Plugin for IntelliJ IDEA #16810
• Add missing criterion to subtype check #16889

Contributors

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

According to git shortlog -sn --no-merges 3.3.0-RC2..3.3.0-RC3 these are:

     7 Dale Wijnand
     5 Szymon Rodziewicz
     2 Paweł Marks
     2 Vasil Vasilev
     1 Martin Odersky
     1 Mohammad Yousuf Minhaj Zia

3.3.0-RC2

This release is nearly identical to 3.3.0-RC1. The only difference is that 3.3.0-RC1 generated output with incorrect TASTy version.

The following changelog is identical to the changelog of 3.3.0-RC1.

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

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

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

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

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 -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 #16680 by registering Ident not containing a symbol #16689
• Fix #16682: CheckUnused missed some used symbols #16690
• Fix the non-miniphase tree traverser #16684

Scala-JS

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

Standard Library

• Add CanEqual instance for Map #15886
• Refine Tuple.Append return type #16140

TASTy format

• Make it a fatal error if erasure cannot resolve a type #16373

Tooling

• Add -Yimports compiler flag #16218
• Allow BooleanSettings to be set with a colon #16425

Transform

• Avoid stackoverflow in ExplicitOuter #16381
• Make lazy vals run on non-fallback graal image - remove dynamic reflection #16346
• Patch to avoid crash in #16351 #16354
• Don't treat package object's <init> methods as package members #16667
• Space: Refine isSubspace property & an example #16574

Typer

• Drop requirement that self types are closed #16648
• Disallow constructor params from appearing in parent types for soundness #16664
• Don't search implicit arguments in singleton type prefix #16490
• Don't rely on isProvisional to determine whether atoms computed #16489
• Support signature polymorphic methods (MethodHandle and VarHandle) #16225
• Prefer parameterless alternatives during ambiguous overload resolution #16315
• Fix calculation to drop transparent classes #16344
• Test case for issue 16311 #16317
• Skip caching provisional OrType atoms #16295
• Avoid cyclic references due to experimental check when inlining #16195
• Track type variable dependencies to guide instanti...

3.2.2

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

Overloading

• Fix curried overloading resolution for polymorphic methods #16485

Parser

• Align implementation with spec of soft modifiers #15961

Pattern Matching

• Fix redundancy (unreachability) warning #16179
• Teach SpaceEngine that generic tuples are irrefutable #16051
• Fix exhaustivity warning #16168

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 Scala 2.x 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
• Compute completions at typerPhase #16371
• Only include accessible base classes in orDominator #16477

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 these are:

    86 Martin Odersky
    24 Yichen Xu
    23 Quentin Bernet
    19 Dale Wijnand
    18 Michael Pollmeier
    13 Paweł Marks
     8 Fengyun Liu
     7 Guillaume Raffin
     7 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

3.2.2-RC2

Backported fixes

• Compute completions at typerPhase #16371
• Only include accessible base classes in orDominator #16477
• Fix curried overloading resolution for polymorphic methods #16485
• Teach SpaceEngine that generic tuples are irrefutable #16051
• Fix exhaustivity warning #16168

Contributors

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

According to git shortlog -sn --no-merges 3.2.2-RC1..3.2.2-RC2 these are:

     3  Martin Odersky
     3  Paweł Marks
     2  Dale Wijnand
     1  Som Snytt

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