build(deps): update dependency scala to v3.8.4 (main)

[renovate]

ℹ️ Note

This PR body was truncated due to platform limits.

This PR contains the following updates:

Package	Change	Age	Confidence
scala (source)	3.3.0 → 3.8.4

---

Release Notes

scala/scala3 (scala)

v3.8.4

Compare Source

v3.8.3

Compare Source

Release highlights

• Add support for local coverage on and off with // $COVERAGE-OFF$ and // $COVERAGE-ON$ #​24486
• Deprecate for removal -print-lines compiler setting #​25330
• Add safe mode capture checking extension #​25307
• Port the Scala2 JVM backend optimizer #​25165

Other changes and fixes

Desugaring

• Fix #​24997: Avoid unnecessary CHECKCAST in untupled function parameters #​25085

Documentation

• Fix little errors in the API documentation #​25241
• CC Language Reference: Rename cap to any/fresh #​25057

Enums

• Deprecate override class, improve checks #​24828
• Fix Java enum forwarders to pull from companion on initialization #​24361

Experimental: Capture Checking

• Rename caps.cap to caps.any #​24923
• Track global capabilities #​24883
• Treat local mutable vars as capabilities #​24815
• Fix Crashes when Capture-set Parameters Conflict with Terms #​25029
• Replace "cannot be included in" by "cannot flow into" in error messages #​25155
• CC: Add field captures to self-type constraints #​24984
• Add uses clauses for templates #​24857
• Drop special code paths for objects #​24881
• Do not consider generated getters to be update def #​24906
• Under cc, mark inferred type arguments to inline methods with an @inferred annotation #​25175
• Handle call-by-name types in bad locations under cc #​25154
• Fixes for global capabilities #​25123
• Warn if reach capability in result will likely cause leakage #​24860
• Make <fluid> decorations replace existing capture sets #​25012
• Make TypeMaps in Setup work correctly for fresh #​24985
• For a limited time, also recognize caps.cap #​25076
• Fix closure typing #​25014
• Map class capture sets via as-seen-from with prefix of created types #​24830
• Drop SafeMode attribute in Tasty #​25357
• Fix @​assumeSafe addition in safe mode #​25364
• Disallow @​assumeSafe under safe mode #​25462

Experimental: Modularity

• Fix nested desugaring of applied constructor types #​25288

Exports

• Add ctor proxies before exports #​24884

Inline

• Make containsOuterRefsAnywhere follow aliases #​25214
• Find annotation args in inline expansion #​24895
• Also substitute symbols in case bindings symbols #​24849

JDK

• Skip over JEP 445 compact compilation units #​23247
• Handle MissingType during Erasure phase #​24817

JVM Backend

• Simplify JVM interface list emission, remove a mini-phase #​25203
• Don't generate bridge methods for inaccessible Java package-private methods #​25166
• Revise isLocalToCompilationUnit #​24856
• Enforce JVM UTF-8 string limits in the backend #​25300
• Fix class super-call invokespecial owner #​25437

Linting

• Extension check handles hiBound of opaque type #​25172
• Distrust tree pos for patvar lint #​25043
• Move second CheckUnused after pattern matcher #​25114
• Unused lint ignores args to ctor of enclosing class #​24768
• Check inline expansion for exclusion #​23019

Metaprogramming

• Fix: Fix incremental compilation of (some unquoted) macros #​24969

Named Tuples

• Don't try checking for ambiguous single-element tuples when in types #​24910
• Fix "NamedTuple type in match is parsed as named pattern" #​24929
• Fix "Named pattern matching doesn't work in val statements or for generators" #​24928
• Fix false exhaustivity warning for pattern returning NamedTuple #​23362

Overloading

• Prefer non-extension to extension #​24943

Parser

• Check seen for TypeParamRef in TypeSizeAccumulator #​25264
• End of new expr never shrinks #​25253
• Use toVector for XML literal sequences #​23221

Pattern Matching

• Emit unchecked warnings for trait patterns #​24962

Presentation Compiler

• Bugfix: inline value false-positive shadowing with lambda params #​25140
• Test hover on backticked identifiers with whitespace #​25142
• Inlining interpolated variables #​25144
• Bugfix: treat self types as parent types #​25167
• Feat(pc): add closing labels inlay hints #​25178
• Coursier dependency imports should have lexicographic ordering #​21592
• Bugfix: Fix various minor presentation compiler issues #​25256
• Fix negative activeParameter in signature help #​24945
• Closes #​7532: Parameter hints not working for functions #​23854
• Fix opaque types displayed as Nothing & Any in hover and signature help #​24921

REPL

• Skip module-info.class files during REPL tab-completion #​24838
• Fix REPL usage of macros loaded via :dep and :jar #​25312
• Make REPL type echo-ing use partially qualified names where made possible by imports #​24850
• Force REPL to not evaluate LazyList #​25444

Reporting

• Check -Werror on summarize #​25096
• Fixes #​24233: Remove misleading JDK compatibility hint for TASTy errors #​25171
• Ignore resetting if preferPrevious #​24991
• Enhance WInferUnion to not warn propagated explicit union types #​25280
• Improve diagnostic message for unnecessary trailing underscore in eta-expansion #​25285
• More descriptive "not found" message when type/term exists with the expected term/type name #​24959
• Warn on Scala 2 auto-apply if loosely nullary #​24811
• Fix printing references to nested objects #​25086
• Add error note for type mismatch involving blocks without last expression #​25181
• Drop -print-lines option #​24905
• Don't suggest invisible members of root imports #​24999

Runner

• Bump Scala CLI to v1.12.3 (was v1.12.2) #​25365
• Bump Scala CLI to 1.12.4 (was 1.12.3) #​25434

Rewrites

• Accommodate ArrowAssoc in infix named arg migration #​25255

Scaladoc

• Init MacroClassLoader in scaladoc #​25141
• Scaladoc Overload Method Link Fix #​25156
• Fix duplicate member entries in Scaladoc generation #​24712
• Scaladoc Tests for CC #​25277
• Skip generation of API pages when building reference docs #​25153
• Docs: Enforce links checks in the generated docs #​25425

Scala.js

• Fix issues in presentation compiler when using Scala JS #​25450
• Fix issues with Scala JS and the presentation compiler #​25550

Settings

• Don't enable compact annotations under 2.13. #​25419

Standard Library

• Remove incorrect equals implementations from ArrayBuilder #​25205
• Use StringBuilder intead of StringBuffer in Regex #​24576
• Update StringOps.* implementation #​24786

TASTy format

• Don't absolutize sources outside of the sourceroot in TASTy #​25429

Tooling

• Fix behavior of -Ydump-sbt-inc #​25125

Typer

• Never widen constant type on selector type in matches #​25197
• Preserve insertion order when balancing And/OrType #​25361
• Improve ref check of constructors #​24342

Quotes

• Fix #​25208: handle AndType(TermRef, TypeRef) in TreeUnpickler path trees #​25209

Contributors

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

According to git shortlog -sn --no-merges 3.8.2..3.8.3 these are:

    92	Martin Odersky
    68	Solal Pirelli
    65	Wojciech Mazur
    27	Som Snytt
    13	Tomasz Godzik
    11	Li Haoyi
     9	Kenji Yoshida
     9	Oliver Bračevac
     8	Rikito Taniguchi
     7	dependabot[bot]
     5	Jakub Warchoł
     4	Emil Ejbyfeldt
     4	Hamza Remmal
     4	Zieliński Patryk
     4	noti0na1
     3	Binayak Das
     3	Lukas Rytz
     3	Matt Bovel
     3	Piotr Chabelski
     2	Chua Chee Seng
     2	Eugene Yokota
     2	Jamie Thompson
     2	Jędrzej Rochala
     2	Natsu Kagami
     2	Oscar Boykin
     2	P. Oscar Boykin
     2	Sébastien Doeraene
     1	Anatolii Kmetiuk
     1	Aviral Garg
     1	Bbn08
     1	Bill Venners
     1	Eric Ventor
     1	Jentsch
     1	Jeon Yoonjae
     1	Krrish Biswas
     1	Matt Dziuban
     1	Merlin Hughes
     1	Philippus Baalman
     1	Vadim Chelyshov

v3.8.2

Compare Source

Highlights of the release

• Warn if for with many vals and overloaded map #​25090
• Support :dep ... to add library dependencies in the Scala REPL #​24131
• Upgrade to Scala.js 1.20.2. #​24898
• Bump Scala CLI to v1.12.2 (was 1.11.0) #​25217:
  • New aliases for RC and nightly Scala versions
  • Detailed changelog available in scala-cli release notes for versions: v1.12.0, v1.12.1 and v1.12.2

Other changes and fixes

Context Functions

• Inferred Contextual params are less nameable #​24381

Desugaring

• A comprehension with valdef aliases is never a candidate for map elimination. #​23448

Experimental: Capture Checking

• Capture Checking of Lazy Vals #​24261
• Represent read-only with a classifier #​24295
• Fix typing closure blocks where result type refers to a closure parameter. #​24299
• Systematically recompute denotations when needed in rechecker phases #​24302
• Ensure that read-only methods don't use exclusive capabilities #​24311
• Handle capture parameters in dcs #​24328
• Don't prematurely force info of fields with inferred types #​24336
• Disallow fresh caps from parameter bounds in results #​24541
• Avoid box failures and better diagnosis if they come back #​24546
• Freshen all explicit arguments of type applications #​24354
• Optimize and harden isCaptureChecking tests #​24439
• Add Unscoped classifier #​24470
• Optimization: Introduce CompactAnnotation #​24679

Experimental: Seperation Checking

• Changes to Mutable #​24352
• Don't crash when update is used as a modifier outside cc #​24378
• Imply update only for consume methods in Mutable classes #​24383
• Decompose Mutable #​24495
• Add freeze wrapper (2) #​24518
• Make Arrays mutable types under separation checking #​24649

Experimental: Explcit Nulls

• Relax flow typing checks on Flexible Types #​24278
• Do not expose flexible types #​24292
• Do not search contextual function type in union types in general #​24393
• Add jspecify NonNull annotation to NotNullAnnots list #​24487
• Recognize Nullable annotations in explicit nulls #​25237

Experimental: Global Initialization

• Global object init checker gives warning when accessing an object before its super constructor finishes #​24349

Annotations

• Accommodate adapted Scala 2 annotation value #​17516
• Harden Annotation.refersToParamOf #​24647
• Do not allow @targetName on primary constructor too #​24682

Coverage

• Fix issues with Scala.js and coverage #​24769
• Make coverage support incremental compilation #​24773
• Improvement: Try to optimize coverage phase #​24925

Enums

• Lint enum case in outer context #​24652

Exports

• Preserve select of exported member in newExpr #​24570

Erasure

• Fix isJvmAccessible to handle nested protected Java classes #​24625

Inline

• Allow references to erased values in types #​24421
• Cast inline call results to result type, not method type #​25111
• Fix "Compiler crash when calling another file's inline def that uses a private constructor" #​24941

Implicits

• Avoid more constraints in result if trying views #​24369

Initialization

• Skip caret when source is missing in initialization checker #​23926

JVM Backend

• Preserve singleton types for final val aliases to Java enum constants #​24980

Linting

• Suppression matches inlined positions #​24092
• Wshadow option recognizes Wall #​24469

Nullability

• Record NotNullInfo for exceptional try-catch #​24320

Overloading

• Ignore selection prototypes when typing type applications #​24489
• Fix varargs overload resolution with wildcard types #​24669
• Fix override checking for Java methods with covariant array #​24408

Parser

• Permit new with trivial end #​24331
• Single line case lambda gets a region #​24497
• Error tree on outdent is zero extent #​23796

Pattern Matching

• Fix false exhaustivity for GADT under separate compilation #​23966

Presentation Compiler

• Create extension method in infer method action #​24721
• Exclude XRayModeHint for synthetics #​24722
• Fix incorrect XRay hint #​24738
• Improve multi-line code message rendering #​24723
• Improvement: Allow passing -explain to the presentation compiler #​24740
• Handle inlined tree in implicit parameter inlay hints #​24762

REPL

• Improve REPL code, echo and exception highlighting with pprint and fansi #​24298
• Replace REPL signal handling with raw mode jline terminal to make Ctrl-C handling work when REPL is a child process #​24842
• Fix "Colon as operator part at beginning of line in REPL" #​24942
• Fix "REPL dependency on scala-parallel-collections doesn't work" #​25064
• Fix "Still can't use scala-parallel-collections in REPL via :dep" #​25092

Reporting

• Addendum when apply error involves default arg #​21133
• Forward reference error includes line numbers #​22534
• Improve error messages for scope extrusion errors #​24318
• Use a better span for an anonymous class #​24640
• Add ErrorMessageID to -Winfer-union warnings (#​25073) #​25249

Scaladoc

• Allow to additional scalacOptions in Markdown code snippets #​24755

Standard Library

• Enable capture checking on Tuple #​24345
• Update StringOps.padTo implementation #​24575
• Use String.repeat in scala.io.Source #​24594
• Ensure stability of IArray.tapEach #​24727

TASTy

• Pickle CompactAnnotations as regular annotations #​25213
• Drop spurious applies in unpickler and inliner #​25201

Transform

• Adjust purity of trait with lazy member #​23788

Tuples

• Fix inconsistent typeSize calculation for TupleN vs recursive pair encodings #​24743

Typer

• Dealias type of type constructor in typedAppliedTypeTree #​24522
• Improve TypeVar instantiation logic #​24697
• Try to instantiate TypeVars inside pt when possible #​24231
• Error instead of crash when generating trees referring to skolems #​24380
• Try to fix callee type inference in typedFunctionValue #​24732
• Fix wildcardArgOK for mixed wildcard/concrete type args #​25001

Union types

• Dealias in isSimpleThrowable check #​24744

Value class

• Avoid NPE when calling hashCode on a value class wrapping null #​25110

Quotes

• Make quotes.reflect.Position.ofMacroExpansion consider -Ymagic-offset-header #​24301

Contributors

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

According to git shortlog -sn --no-merges 3.8.1..3.8.2 these are:

   103	Martin Odersky
    93	Hamza Remmal
    79	Wojciech Mazur
    36	Som Snytt
    27	noti0na1
    16	Rikito Taniguchi
     9	Li Haoyi
     8	Matt Bovel
     8	Oliver Bračevac
     7	Kenji Yoshida
     7	Natsu Kagami
     7	Tomasz Godzik
     7	Yichen Xu
     6	Jan Chyb
     6	Piotr Chabelski
     5	Zieliński Patryk
     5	dependabot[bot]
     4	HarrisL2
     4	Lukas Rytz
     3	Jamie Thompson
     2	Chua Chee Seng
     2	Fengyun Liu
     2	Guillaume Martres
     2	Lluc Santamaria Riba
     2	Sébastien Doeraene
     1	Alex1005a
     1	Bill Venners
     1	Emil Ejbyfeldt
     1	EnzeXing
     1	Evgeny Vereshchagin
     1	Jeon Yoonjae
     1	Lorenzo Gabriele
     1	Seth Tisue
     1	matsu-chara
     1	rjolly
     1	zielinsky

v3.8.1

Compare Source

Highlights of the release

Scala 3.8.1 is a hotfix release for 3.8.0.
It addresses runtime regressions found after the 3.8.0 artifacts were released, specifically JVM linkage errors affecting a small subset of Scala 2 specialized types and members.

Additional regressions

The following regressions still present in 3.8.1 will be addressed in a forthcoming 3.8.2 hotfix release:

• Some for comprehensions have incorrect behavior at runtime (#​24673)
• Certain code involving calls to certain parts of the Java standard library fail to compile (#​25133)

Cautious users may wish to wait for 3.8.2.

Fixed regressions

• Revert addition of new base trait to ReturnThrowable #​24975
• Use uninlined version of Scala 2 standard-library in ScalaLibraryPlugin #​25008
• Add missing specialized method in NumericRange #​25020
• Correct the list of files to copy from Scala 2 #​25033

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

v3.8.0

Compare Source

Please use Scala 3.8.1
Version 3.8.0 was published with runtime regressions.

Highlights of the release

• Require JDK 17+ #​24146
• Add explicit null checks to Scala 3 Standard Library #​23566
• Add capture-checking to Scala 3 Standard Library #​23688
• Add capture-checking to Scala 2 collections #​23769
• Extract REPL to be its own artifact #​24243
• SIP-57: Make runtimeChecked a standard feature #​23262
• SIP-62: Make better-fors a stable feature #​23630
• Preview SIP-71: Make into preview feature #​24090
• Experimental SIP-67: Strict equality pattern matching #​23803
• Experimental SIP-70: Allow multiple spreads in function arguments #​23855
• Experimental SIP-75: Allow single-line lambdas after : #​23821
• Experimental: Match if sub cases #​23786
• Support JDK 26 #​24430
• Make scala.caps.Pure non-experimental #​23745
• Allow annotations to annotate themselves #​24447
• Changed indicator for LTS/Next series indicator in pom.xml #​24709

Other changes and fixes

Annotations

• Emit deprecation warnings when a symbol is annotated by a deprecated annotation #​23906
• Deprecate scala.annotation.elidable #​23913
• Deprecate scala.annotation.transparentTrait #​23116

Experimental: Capture Checking

• Make scala.caps.Pure transparent #​23914
• Make scala.caps.Capability non-experimental #​23507
• Check conformance to scala.caps.Pure upper bound only under cc #​23784
• Widen type parameters before box adaptation #​23809
• Level checking: distinguish between certain capset vars with same owner #​24077
• Implement FreshCap Handling for Classes and Objects #​24136
• Skip capture sets in checkNoPrivateLeaks and drop them in posttyper when cc is not enabled #​23886
• Changes around reaches and uses #​23584
• Revise capability hierarchy and fix classifiers #​23656
• Improve closure typing #​23700
• Better printing of capabilities in error messages #​23701
• More improvements to error messages #​23721
• CC Language Ref Polishings #​23762
• CC Language Reference Improvements v2 #​23818
• Changes in CC around classes, constructors, this #​23874
• Various fixes and simplifications #​23881
• Simplify Level Checking and Fix Errors #​23934
• Introduce precise refined types #​24154
• Fix unsoundness in APPLY and SELECT rules #​24159
• Fixes for mutability #​24205
• Implement inheritance condition for Mutable types #​24253
• Don't add cap when creating instances of capability classes. #​24256
• Changes to Fresh and Separation Checking #​24112
• Avoid blowup of compute times for ill-formed retains #​24564
• Fix apply rule #​24273

Experimental: Explicit Nulls

• Only nullify tasty if Yflexify-tasty is set; Refine FlexibleType nullification rules #​23938
• Apply flexible types to files compiled without explicit nulls #​23386
• Fix NotNullInfo in multi-case match #​23864
• Fix captureWildcards with FlexibleType #​24070
• Do not assume left is non-null if another branch is null in splitLast #​24325
• Fix #​24440: Do not check public flexible types on artifact symbols or inside anonymous classes #​24471

Experimental: Global Initalization

• Modelling assigning to null in the global object initialization checker #​23858
• Fix global init checker unexpected by name #​23859
• Fix selection on safe value in the global object initialization checker #​23860
• Re-design Env of the global object init checker #​24107

Experimental: Into

• Allow into on enums #​23795

Experimental: Modularity

• Simpler inference for tracked #​22972

Implicits

• Only check seen for LazyRef for TypeSizeAccumulator #​20459
• Derived members succeed other givens in cycle test #​23898

JVM Backend

• Fix generic signatures for mixin forwarders conflicting type parameter names #​24567
• Look at the underlying of a TermRef for a getter #​24565
• Refine parameter adaptation logic for arrays #​23591
• Fix #​24573: Add stricter checks for platform SAM compatibility #​24624
• Only rename method type params shadowing enclosing class type params #​24684
• Update BackendUtils.classfileVersionMap #​23954
• Refine TypeErasure.samExpansionNotNeeded to check parent traits if SAM is covered #​24843

Linting

• Drill through type lambda for tree symbol #​23699
• Warn unused masking imports, remove obsolete unused options #​23757
• Unused lint does not rewrite suppressed warnings #​24055
• Check for synthetic case methods in unused lint #​24239
• CheckUnused examines type of Apply #​24465
• Suggest runtimeChecked in warning/error messages #​24672
• Parameter name can be masked in import #​24635

Match Types

• Prioritize tree type over proto type when typing Binds #​24175

Metaprogramming

• Warn about encoded pkg obj names #​22707

Named Tuples

• Prohibit selection of tuples with members named apply. #​24191
• Add an Ordering given instance for named tuples #​23379
• Named tuple toMap extension method #​23827

Opaque Types

• Prevent opaque types leaking from transparent inline methods #​23792
• Make opaque types decomposable #​24068

Packaging

• Ensure scala3-library does not contain .class or .tasty files #​24714
• Ensure that scala3-library artifacts are empty #​24816
• Actively remove Scala 2 pickles and emit synthetic TASTy attribute for copied stdlib .class files #​24846

Parser

• Make consume a soft modifier #​23755

Pattern Matching

• Fix false exhaustivity warning for seq match #​23968
• Use upper bound of abstract types in exhaustivity checking #​23909

Performance

• Make compilationUnitInfo of TastyLoader lazy #​24604
• Strip CC annotations in TypeMap when CC is not enabled #​24556

Pickling

• Cleanup the type of UnApply trees in posttyper #​24259

Presentation Compiler

• Make sure that we can query tree.source #​24123
• Add unsafe RawPresentationCompiler implementation #​24133

Reporting

• Fix span of private this warning #​23947
• Improve printing of strings #​22945
• Better grouping of explanations in error messages #​24155
• Better error message: reassignment to val #​24184

Reflection

• Add missing apply constructors for Refined and TypeProjection TypeTrees #​23837

REPL

• Use PPrint to handle printing of REPL output values #​23849
• Invoke pprint reflectively #​24119
• Consider rendering prefix when pretty printing values in the REPL #​24118
• Trap Ctrl-C in the REPL: if no command is running clear the prompt, if some command is running ask for confirmation before exiting #​24127
• Re-implement Ammonite's Ctrl-C interruption for Scala REPL via bytecode instrumentation #​24194
• Remove pipes from multi-line REPL prompts #​24307
• Reintroduce reflective REPL pprint call. #​24353
• Cleanups and source compatibility improvements for repl.AbstractFileClassLoader #​24514
• Fix REPL interrupt instrumentation conditional #​24837

Scala Runner

• Drop scala_legacy and MainGenericRunner #​24244
• Drop -run and -repl in MainGenericCompiler #​24289
• Bump Scala CLI to v1.10.0 (was v1.9.1) and Coursier to v2.1.25-M19 (was 2.1.24) #​24362
• Bump Scala CLI to 1.10.1 (was 1.10.0) #​24448
• Bump Scala CLI to 1.11.0 (was 1.10.1) and coursier to 2.1.25-M21 (was 2.1.25-M19) #​24739

Scaladoc

• Add FlexibleType support for scaladoc #​23320
• Render @consume as the consume modifier #​23754
• Do not render consume update in scaladoc #​23760

Scala.js

• Upgrade to Scala.js 1.20.1. #​23884
• Support js.async and js.await, including JSPI on Wasm. #​23846
• Add JS-specific version of VarArgsBuilder. #​24144
• Port scala-stdlib for Scala.js #​24115
• Do not patch the implicit scope of scala.Unit in Scala.js #​24405
• Revert "do not patch the implicit scope of scala.Unit in Scala.js" #​24475
• Have the correct properties when testing Scala.js #​24463
• Add missing mapSourceURI for scala-library-sjs project #​24450

Settings

• Option warnings are conditional #​13915
• Make -usejavacp a private setting as -Yusejavacp #​24304
• Add missing -language:experimental.* settings #​24513
• Indicate deprecated option aliases #​24359

Specification

• Update reference syntax documentation with named tuples #​23493

Standard Library

• Embed the history of the scala 2 stdlib #​23099
• Add language import in stdlib #​23102
• Add transparent modifier to already assumed transparent types #​23104
• Do not patch stdlib symbols anymore #​23193
• Stabilise Predef.runtimeChecked too #​23917
• Simplify scala.runtime.Statics.releaseFence #​23953
• Deprecate scala.runtime.SymbolLiteral #​23970
• Standard Library Sync: September 24th, 2025 #​24063
• Update method signatures in RedBlackTree to accept correct Iterators #​24085
• Module classes can sometimes extend scala.runtime.AbstractFuntionN in Scala 2 #​24147
• Drop redundant scala.caps.Pure parent traits in stdlib #​24149
• Better support for nullability in Option.apply and drop Option.fromNullable #​24238
• Officially deprecate scala.App in Scala 3 #​24242
• Be more conservative in what we copy from Scala 2 #​24339
• Fix the dependencies of the bootstrapped stdlib #​24379
• Fix bytecode attributes for patched files #​24180
• Add library.properties to resources of scala-library jars #​24332
• Make Java defined functions nullary when we override them #​24461
• Allow to compile scala.AnyVal with Scala 3 #​24406
• Fix #​24599: Remove | Null from implicit BigDecimal conversion similar to BigInt #​24600
• Deprecate the content of the scala.runtime.stdLibPatches package #​24587
• Make scala.Predef capture checked #​24643
• Make style-only changes to doc comments for the standard library. #​24754
• Update to new wildcard syntax in library scaladoc #​24751
• Synchronize standard library sources with Scala 2.13.18 #​24788
• Use up-to-date sources of Scala 2.13 stdlib when patching Scala 3 bytecode #​24855
• Add @uncheckedOverride annotation for definitions that may override #​24545
• Deprecate MapOps.KeySet, replace with private (and more performant) strict/lazy KeySet implementations #​24767

Quotes

• Make typeArgs in QuotesImpl work for AnnotatedTypes #​24018
• Quotes reflect: Allow to return DefDef from a val symbol tree #​22603
• Add ensureApplied to the quotes reflect API #​24160
• Chore: do not assume scala types as transparent, source should enforce it #​23105
• Add missing version of ValDef.let which also accepts flags #​23388
• Stabilise Quotes reflect methods used for creating new classes/objects #​23826
• Fix #​24547: Strip inferred retains annotation from Macro/inline call trees #​24560

TASTy Format

• Update the TastyFormat for matches with sub-cases #​23851

Testing

• Fix line and path separators in test #​23534

Transform

• Check extension method at typer #​24199
• Elide conversion of receiver, extension or inline map, trailing implicit args, in DropForMap #​23416
• Replace sun.misc.Unsafe used in LazyVals with VarHandles #​24109
• Handle FlexibleTypes in asContextFunctionType #​23865
• No mixin forwarder when ancestor is sealed #​23482
• Emit mixin forwarders as ordinary, non-bridge methods again #​23942
• Improve the generic signatures for singleton types #​24288

Typeclass Derivation

• Support Mirror for generic tuples arity > 22 #​23363

Typer

• Disable distribution of intersection types over applied types #​23441
• Push distributivity rule to source future #​24376
• Fix crash in Selectable unapply with custom applyDynamic #​24343
• Tweak tryParameterless to use readapt #​24078
• Mark the type of lifted definitions as inferred #​24104
• Fix "Regression in zio/zio-schema for typer/implicit resolution" #​24156
• Fix #​24456: Cleanup the info of a Bind symbol in posttyper #​24490
• Ignore selection prototypes when typing type applications #​24489
• Fix #​24571: Handling nullable types in convertTo for adapting number constants to target number types #​24580
• Tweak type for tryParameterless #​24716

Union types

• Discard scala.caps.Pure in the erasure of union and intersection types #​24151
• Modify rule for nullable union types in generic signatures #​24129
• Modify type erasure logic of nullable unions for Scala 2 pseudo-unions #​24130

Contributors

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

According to git shortlog -sn --no-merges 3.7.4..3.8.0 these are:

   174 Hamza Remmal
   167 Martin Odersky
    94 noti0na1
    95 Wojciech Mazur
    77 Som Snytt
    39 Eugene Flesselle
    19 Jan Chyb
    19 Oliver Bračevac
    17 Sébastien Doeraene
    16 Natsu Kagami
    14 Li Haoyi
    12 Yichen Xu
    11 HarrisL2
    10 Matthias Berndt
     8 Kacper Korban
     8 Matt Bovel
     8 aherlihy
     7 EnzeXing
     7 Piotr Chabelski
     7 dependabot[bot]
     6 Kenji Yoshida
     6 Rikito Taniguchi
     5 Emil Ejbyfeldt
     5 Seyon Sivatharan
     5 Tomasz Godzik
     4 Lukas Rytz
     4 Zieliński Patryk
     3 Jamie Thompson
     3 Jeon Yoonjae
     3 Yoonjae Jeon
     3 rjolly
     2 Katarzyna Marek
     2 Raphael Jolly
     2 katrinafyi
     1 Aleksey Troitskiy
     1 Alex1005a
     1 Evgeny Vereshchagin
     1 Florian3k
     1 Guillaume Martres
     1 Jędrzej Rochala
     1 Kalin-Rudnicki
     1 Martin Duhem
     1 Martynas Mickevičius
     1 Max Smirnov
     1 Mirco Dotta
     1 Patryk Zieliński
     1 Paweł Perłakowski
     1 Seth Tisue
     1 Vadim Chelyshov
     1 vder
     1 zielinsky
     1 虎鸣

v3.7.4

Compare Source

Highlights of the release

• Bump Scala CLI to v1.9.1 (was v1.9.0) #​23962
• Make coverage more similar to the one in Scala 2 #​23722

Deprecations for removal

• Deprecate scala_legacy/MainGenericRunner/scalac -run/scalac -repl for removal #​24267

Other changes and fixes

Context Functions

• Explain no expansion of ContextFunction0 #​23844

Experimental: Capture Checking

• Fix #​23737: Update superCallContext to include dummy capture parameters in scope #​23740
• Fix separation checking for function results #​23927
• Simple enhancement for pattern matching with capturing types #​23524
• Don't check bounds in match type cases at CC #​23738

Experimental: Explicit Nulls

• Add warnings for inferred flexible types in public methods and fields #​23880

Exports

• Refine isEffectivelyFinal to avoid no-owner crash #​23675

Implicits

• Fix LiftToAnchors for higher-kinded type applications #​23672
• Fix implicit scope liftToAnchors for parameter lower bounds #​23679

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