Highlights of the release

• Warn if interpolator uses toString #20578
• Fixes #15736 blocking Scala 3 on Android #22632
• Implement :jar (deprecate :require) #22343
• In selector check, prefix of reference must match import qualifier #20894
• Fix #21242: Add REPL flag to quit after evaluating init script #22636
• Warn if implicit default shadows given #23559

Other changes and fixes

Annotations

• Approximate annotated types in wildApprox #22893
• Fix copy of annotation on @main methods #22582

CI

• Disable Cats flaky tests #23007

Developer Experience

• Add support for running the test sub-command with the bisect script #22796

Documentation

• Improve the usage of inclusive language #22360
• Update indentation.md to fix a typo #23505

Enums

• Make hashcode of enum items stable #23218

Erasure

• Add regression test for #23616 #23623
• Disallow context function types as value-class parameters #23015
• Handle type aliases in contextFunctionResultTypeAfter #21517
• Align erasure of Array[Nothing] and Array[Null] with Scala 2 #22517

Experimental: Erased definitions

• Erased fields are not nullable #23311

Implicits

• Refine implicit search fallbacks for better ClassTag handling #23532
• Fix #20335: Try extensions for arguments with type mismatch error #23212

Inline

• Fix Symbol.info remapping in TreeTypeMap #23432

Lambda Lift

• Fix: treat static vals as enclosures in lambdalift #22452
• Fix: record calls to constructors in lambdaLift #22487

Linting

• Check OrType in interpolated toString lint #23365
• Consider setter of effectively private var #23211
• Nowarn receiver of extension taking params #23351
• Dealias when looking into imports #22889
• Revert unconditional lint of Inlined expansion #22815
• Warn unused member of anonymous class #22729
• No warning for parameter of overriding method #22757
• Lazy val def member is pattern var #22750
• Ignore params to default arg getters #22749
• Restore resolving prefixes of implicit Ident #22751
• Exclude synthetic this.m, Any.m from import lookup #22695
• Nowarn public implicit val class params #22664
• Don't warn retainedBody #22510
• Suppress spurious Suppression #22383
• Handle Typeable #22663
• CheckUnused checks span.exists before testing its parts #22504
• Process Export for unused check #22984
• Enclosing package p.q not visible as q #23069
• Remove premature caching of lookups for unused lint #22982
• Improve checking LHS of Assign #22977
• Improve Unit ascription escape hatch #23147
• Mention extension in unused param warning #23132
• Dealias for unused param check #23256
• Take inferred or explicit refinement result for unused check #23325
• Add accessible check for import usage #23348
• Use result of lambda type of implicit in CheckUnused #23497

Match Types

• Handle NoType in TypeComparer.disjointnessBoundary #21520
• Fix: #23261 Distinguish 0.0 and -0.0 in ConstantType match types #23265

Metaprogramming

• Add a check for correct Array shape in quotes.reflect.ClassOfConstant #22033

Opaque Types

• Fix stack overflow errors when generating opaque type proxies #22479

Optional Braces

• Correctly detect colon lambda eol indent for optional brace of argument #22477

Overloading

• Fail compilation if multiple conflicting top-level private defs/vals are in the same package #22759

Parser

• Allow observing an indent after conditional #22611
• No outdent at eof #22435
• Fix annotations being not expected in the middle of an array type by java parser #22391
• Fix incorrect warning with -no-indent #23216

Pattern Matching

• Fix issue in lazy symbol completion or bug in nested classfile parser #23634
• Fix existing GADT constraints with introduced pattern-bound symbols #22928
• Avoid crash in uninhab check in Space #22601

Pickling

• Try to handle SkolemTypes in SingletonTypeTree during pickling #23236

Positions

• Compare span points in pathTo to determine best span #23581

Presentation Compiler

• Fix: Fix extracting refinements from intersection types in dynamic select hovers #23640
• Completions for requests just before string #22894
• Add enum type param support in sourceSymbol #18603
• Use untpd.Tree instead of tpd.Tree for SelectionRangeProvider #22702
• Fix: handle multiple params lists in for infer type #23197
• Fix completion mode filtering + optimize scopeCompletions #23172
• Add selection ranges for more names #23257
• Add inlay hints for by-name parameters #23283
• Add jpath to VirtualFile (for pc) #23203

Quotes

• Fix issue with static this references erroring in quoted code #22618
• Skip splice level checking for symbols #22782
• Fix stale top level synthetic package object being used in later runs #23464

REPL

• REPL: JLine 3.29.0 (was 3.27.1) #22679
• Repl: emit warning for the :sh command #22694

Reflection

• Fix regression: do not approximate prefixes when using memberType in reflect API #22448
• Forbid StringConstant(null) #23064
• Quotes reflect: sort the typeMembers output list and filter out non-members #22876

Reporting

• Register nowarn when inlining #22682
• Filter help renders box border #22434
• Fix incorrect warning on type ascription for backquoted identifiers #23088
• Add an explainer to the DoubleDefinition error #23470

Scaladoc

• Encode path of class #23503

Settings

• Chore: filter allowed source versions by import and by settings #23215

Testing framework

• Revert dubious retry in vulpix #21801

Transform

• Check only stable qual for import prefix #22633
• Warn trivial recursion with module prefix #23278

Tuples

• Normalize tuple types in var args seq literals and classOf instances #23465

Typer

• Generalize "Don't approximate a type using Nothing as prefix" #23628
• Don't approximate a type using Nothing as prefix #23531
• Tighten condition to preserve denotation in IntegrateMap #23060
• Disallow context bounds in type lambdas #22659
• Fix #22724: Revert the PolyType case in #21744 #22820
• Fix isGenericArrayElement for higher-kinded types #22938
• Revert lambda cleanup #22697
• Constructor companion gets privateWithin #22627
• Add regression test for #22076 #22602
• Constructor proxy is restricted if class is protected #22563
• Check if a prefix is valid before selecting from a type #22368
• Preserve hard unions in widenSingletons #22369
• Revert recent changes to opaque type proxy generation #23059
• Compare TypeVar and TypeParamRef in mergeRefinedOrApplied #23045
• Only keep denotation for methods in IntegrateMap #23226
• Tighten condition when to do SAM type conversion #23246
• Revert "Make overload pruning based on result types less aggressive (#21744)" in main #23331
• Fix #22922: Add TypeParamRef handling in isSingletonBounded #23501
• Fix this references everywhere in dependent function types #23514
• More careful ClassTag instantiation #23659
• Use more context for implicit search only if no default argument #23664

JDK

• Check path of module prefix for tailrec #23491

Releases

• [CI] Switch releasing to Sontype Central instead of legacy Sonatype OSS #23290