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