Release highlights

• Warn if implicit default shadows given #23559
• Standardize on -Vprint:... (still support -Xprint:... as alias) #22828

Other changes and fixes

Desugaring

• Optimize simple tuple extraction #23373

Enums

• Make hashcode of enum items stable #23218

Erasure

• Replace erased class modifiers with Erased base traits #23447
• Bring back part of PruneErasedDefs #23466

Experimental: Capture Checking

• Fix parsing crash for update in later phases #23390
• Implement boxing for singleton type arguments #23418
• Expand Capability types also in arguments of Capability classes #23427
• Adjustments to the capability trilogy #23428
• Set context owner to the method for paramsToCap #23436
• Flatten nested capture sets in retainedElementsRaw #23571
• Fix well-formed test for capabilities #23393
• Add restricted capabilities x.only[C] #23485
• Rely on hidden sets for use checking #23580

Experimental: Separation Checking

• Make separation checking controlled by language import #23560

Experimental: Erased Definitions

• Refactorings and fixes to erased definition handling #23404

Experimental: Explicit Nulls

• Add quick fix to remove unnecessary .nn #23461
• Add stableNull annotation to force tracking mutable fields #23528

Experimental: Global Initialization

• Rewrite resolveThis in global init checker #23282
• Fix errors in the global initialization checker when compiling bootstrapped dotty #23429
• Fix error in product-sequence match in global init checker #23480

Experimental: Into

• Fix isConversionTargetType test #23401

Experimental: Modularity

• Refinements to skolemizaton #23513

Experimental: Unroll

• Enable UnrollDefinitions phase in REPL frontend phases #23433

Extension Methods

• Avoid forcing extension on check of local select #23439

Implicits

• Refine implicit search fallbacks for better ClassTag handling #23532

Inline

• Fix Symbol.info remapping in TreeTypeMap #23432
• Fail not inlined inline method calls early #22925
• Fix inline export forwarder generation regression #23126

Linting

• Consider setter of effectively private var #23211
• Add accessible check for import usage #23348
• Check OrType in interpolated toString lint #23365
• Use result of lambda type of implicit in CheckUnused #23497
• Add suppression if nowarn differs #23652

Match Types

• Fix: #23261 Distinguish 0.0 and -0.0 in ConstantType match types #23265

Named Tuples

• Skip bypassing unapply for scala 2 case classes to allow for single-element named tuple in unapply #23603

Parser

• Enforce -new-syntax under -language:future #23443
• Disallow Scala 2 implicits under -source:future #23472

Pattern Matching

• Fix problems in checking that a constructor is uninhabited for exhaustive match checking #23403

Pickling

• Don't force annotation unpickling when testing for SilentIntoAnnot #23506
• Drop invalid assumption from TastyUnpickler #23353

Printer

• Print update modifier when printing update method definitions #23392

Positions

• Compare span points in pathTo to determine best span #23581
• Add line number magic comment support #23549

Presentation Compiler

• Port Inlay hints for name parameters #23375
• Fix: Simplify infer type for apply #23434
• Fix: Inconsistent annotation tooltips #23454
• Fix adjust type when already exists #23455
• Exclude named parameters inlay hints for java defined #23462
• Fix: StringIndexOutOfBoundsException in presentation compiler's hasColon method #23498
• Add InferredMethodProvider for automatic method signature generation #23563
• Fix completions for Quotes #23619
• Handle default arguments in named parameters for inlay hints #23641
• Fix issue with pc breaking in requiredMethod on newly overloaded valueOf #23708
• Handle default arguments in named parameters for inlay hints #23641
• Fix extracting refinements from intersection types in dynamic select hovers #23640

Quotes

• Skip splice level checking for <refinement> symbols #22782
• Fix stale top level synthetic package object being used in later runs #23464
• Emit an error for quoted pattern type variable after new #23618
• Fix issue with certain polyfunctions not properly matching in macros #23614
• Check PCP of constructor calls on the type #7531

Reflection

• Quotes reflect: sort the typeMembers output list and filter out non-members #22876

Reporting

• Add an explainer to the DoubleDefinition error #23470
• Suppress warnings in comprehensions with 22+ binds #23590
• Unhelpful error message when trying to use named extraction, when not matching case class or named tuple #23354
• Improve error message for conflicting definitions #23453
• -Yprofile-trace properly report macro splicing source #23488
• -Yprofile-trace profiles all inline calls #23490

Rewrites

• Patch empty implicit parens on error recovery #22835
• Rewrite underscore with optional space #23525

Runner

• Bump Scala CLI to v1.9.0 (was v1.8.4) #23702

Scaladoc

• Scaladoc: fixes and improvements to context bounds and extension methods #22156
• Encode path of class #23503

SemanticDB

• Bugfix: Also save infos in semanticdb #23587

Transform

• Handle multiple type parameter lists in value class methods #23516
• Check path of module prefix for tailrec #23491

Tuples

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

Typer

• Fix #22922: Add TypeParamRef handling in isSingletonBounded #23501
• Fix this references everywhere in dependent function types #23514
• Don't approximate a type using Nothing as prefix #23531
• Support cleanup actions in class completers #23515
• Fix regressions in asSeenFrom introduced in 3.7 #23438
• Use correct owner in eta expansion #7564
• Fix irrefutability checking in for with untupling #23273
• Fix missing members reporting for var setters #23476
• Guard against invalid prefixes in argForParam #23508
• Add missing case to TypeComparer #23550
• Fix match type bounds checking problem #23695
• Generalize "Don't approximate a type using Nothing as prefix" #23628
• More careful ClassTag instantiation #23659
• Use more context for implicit search only if no default argument #23664

Contributors

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

According to git shortlog -sn --no-merges 3.7.2..3.7.3 these are:

 85 Martin Odersky
 56 Hamza Remmal
 29 Wojciech Mazur
 20 Som Snytt
 20 noti0na1
 18 Yichen Xu
 15 Jan Chyb
 9 Matt Bovel
 7 EnzeXing
 7 Guillaume Martres
 6 aherlihy
 5 Sébastien Doeraene
 4 Zieliński Patryk
 3 Oliver Bračevac
 3 Piotr Chabelski
 3 Tomasz Godzik
 2 Alexander
 2 Mikołaj Fornal
 2 Seyon Sivatharan
 1 Alex1005a
 1 HarrisL2
 1 Jan
 1 Jentsch
 1 Jędrzej Rochala
 1 Kacper Korban
 1 Katarzyna Marek
 1 Marc GRIS
 1 Martin Duhem
 1 Patryk Zieliński
 1 Przemysław Sajnóg
 1 Seth Tisue
 1 Wessel W. Bakker
 1 bingchen-li
 1 kijuky