Notable Changes

Language & syntax

• Don't insert semicolons in conditions unless indented #12801
• Add escape hatch Selectable.WithoutPreciseParameterTypes #12268
• Add Matchable to the parents of Null in explicit nulls #12697

Scaladoc

• Add no links warning setting to scaladoc #12936
• Search for methods also by type signature #12375

Metaprogramming

• Map opaque types in arguments of inlined calls to proxies #12922
• Don't forget side effects in prefixes of inlined function calls #12842
• Drop "no inlines with opaques" implementation restriction #12815
• Detect abstract inline method calls after inlining #12777
• Fix implicit ValueOf synthesis #12615

Other improvements

• Add Scala 3 batch commands for Windows #13006
• Fix #12981: show diagnostics levels (warn | error) in REPL #13000
• Use WeakHashSet instead of HashSet for hash-consing types #12935
• Balance And/Or types when forming lubs and glbs #12928
• Restricts isInstanceOf[Null] checks #12905
• Add support for shallow capture sets #12875
• Drop implementation restriction for polymorphic functions #12863
• Preserve hard unions in more situations #12654
• Better support type-heavy pattern matches #12549

Other bug fixes

• Fix #13046: override is a valid identifier in Java, not a keyword #13048
• Don't emit Java generic signatures for constructors #13047
• Exhaustivity warnings on nested case classes #13030
• Refine overriding pairs in RefChecks #12982
• Let annotations on parameters see preceding type parameters #12980
• Retain transparent flag on exports #12978
• Widen unions before finding members #12925
• ProtoTypes#normalizedCompatible: keep more constraints #12924
• Detect provisional superclasses and recompute them in Typer #12912
• Properly handle self-types in reflection member lookup #12893
• Use Java rules for member lookup in .java sources #12884
• Hide problematic static forwarders #12860
• When checking tp1 <:< tycon2[args2], widen tp1 to reveal application #12846
• Skip contexts for implicit search when resolving imports #12816
• Insert conversions also on selections wrapped in type applications #12719
• Emit generic signature for static forwarders to nullary methods #12710
• Always generate a partial function from a lambda #12670
• Fix #12572: Ignore default accessor bridges in non-native JS classes. #12657

Contributors

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

According to git shortlog -sn --no-merges 3.0.1..3.0.2-RC1 these are:

    85 Martin Odersky
    60 Liu Fengyun
    47 Kacper Korban
    28 Filip Zybała
    17	Andrzej Ratajczak
    16 Guillaume Martres
    15 Jamie Thompson
    10 bjornregnell
     9	tanishiking
     8	Dylan Halperin
     8	Anatolii Kmetiuk
     7	Tom Grigg
     5	Som Snytt
     5	changvvb
     4	Nicolas Stucki
     4	Aleksander Boruch-Gruszecki
     4	Sébastien Doeraene
     4	Michał Pałka
     3	Magnolia.K
     3	Phil
     3	Krzysztof Romanowski
     3	Paweł Marks
     2	xuwei-k
     2	Ben Plommer
     2	Florian Schmaus
     2	Lukas Rytz
     2	Maciej Gorywoda
     2	Markus Sutter
     2	Roman Kotelnikov
     2	Stéphane Micheloud
     2	noti0na1
     2	vincenzobaz
     1	Ondrej Lhotak
     1	KazuyaMiayshita
     1	odersky
     1	Julian Mendez
     1	Anton Sviridov
     1	GavinRay97
     1	EnzeXing
     1	Tomas Mikula
     1	Tomasz Godzik
     1	Vaastav Arora
     1	Vadim Chelyshov
     1	Will Sargent
     1	Zofia Bartyzel
     1	Dale Wijnand
     1	Bjorn Regnell
     1	dmitrii.naumenko
     1	Adrien Piquerez
     1	Meriam Lachkar
     1	Martin
     1	Olivier Blanvillain
     1	Lorenzo Gabriele

Reporting Bugs

If you encounter a bug, please open an issue! 🙏