Highlights of the release

• Bump Scala CLI to 1.18.0 (was 1.17.1) #27255
• Implement SIP-77: Method Block End Markers #24251

Other changes and fixes

Annotations

• Avoid crashing for an inlined Java annot with a default value #27095
• Support Symbol name in @deprecatedName #27048
• Reject @throws on non-methods and constructors #27064
• Check whether annotation constructors are deprecated #27049

JVM Backend

• Optimize and simplify ScalaPrimitives #27142
• Stop capturing a Context in PostProcessor #26328
• Use the right context when loading symbols during gensig #27031
• Encapsulate CallGraph and Inliner #26320

Coverage

• Coverage: unescape when deserializing #27127

Documentation

• Tweak doc warnings #26855
• Fix typo in -> ScalaDoc #26979
• Doc: clarify behavior of line-related functions #27047

Exports

• Fix generic signature of exported module accessors #27046
• Improve error messages for export statements #27186

Implicits

• Reset typer state on issueErrors #23556

Incremental Compilation

• Fix Symbol.copy ignoring its compilation unit argument #27162

Inline

• Error out when primaryConstructor params are used out of scope in macros #27100
• Fix #26958 recover call skolem nested in a sibling inline proxy's type #26966
• In inlined code, try to preserve SkolemTypes generated from outer inline calls #26915
• Also call avoidingType when using the custom unpackProxiesFromResultType during inlining #26893

JDK

• ClassfileParser: Compute permitted symbols lazily to avoid cyclic refs #27129

Parser

• Parser: do not create empty integer literals #27126

Pattern Matching

• Fix pattern matching on sealed Java classes with unavailable member types #27069
• Avoid trivially true branch for the last arm of an exhaustive match #27070

Performance

• Use String as the SourceFile content type #26846
• Micro-optimizations, mostly focused on allocations #27077
• Avoid some instances of boxing #26939

Presentation Compiler

• Add small performance improvements to the presentation compiler #27083
• Fix version completion detection after a trailing colon #27035

Quotes

• Fix macro typecheck when source content is not available #27195
• Fix crash pickling a quote as an inline argument (in different source) #27039
• Also dealias transparent types when dealiasing opaques in typedSplice #26984
• Fix stale symbol error caused by currentSymbol.isStaticOwner call #26962
• Fix how DefDef references are recorded when checking macros #27263

REPL

• Parser: allow incomplete files when return type is missing #27175
• Feat(repl): add resource directives and a :resource command #27073
• Fix(repl): keep session state when using :jar and :dep #27072
• Don't try to flexify type lambdas in FlexibleType.make #27057
• Don't warn about flexible types in REPL wrapper objects #27058
• Fix(repl): do not reuse a resN name that is still in use #26974
• Fix(repl): -Xrepl-interrupt-instrumentation:local instrumenting nothing #26960
• Remove uses of unsafeNulls from the REPL #26954
• Update JLine patch version #27059

Reporting

• Warn when catching Errors #26794
• Make coverage skip message an info #27028
• Improve message for ambiguous negative literal #27037
• Warn on synchronized for Java value classes #27128
• Add forgotten stripNull to #27128 #27147

SBT Bridge

• Signal dependencyPhaseCompleted after dependencies are sent #27135
• Send dependencies of Java sources to zinc under -Xjava-tasty #27137
• Pipelining: wait for queued early TASTy before ending a run #27141
• Report JDK classes under -release as binary dependencies #27132
• Omit the empty package from names of Java classes reported to zinc #27136

Scala JS

• Fix crash boxing Scala.js (+ Scala2) value class to Object #27082
• Scala.js: Prepare for minimal Wasm modules. #26990

Scaladoc

• Scaladoc: pass classpath to tasty inspector via ctx #27167
• Fix Javadoc anchors built from flexible types #27060

Scripting

• Close the Source used to validate target scripts #27188

Settings

• Fix MainGenericCompiler -D property parsing #27025

Standard Library

• Type Fix in StreamExtensions #27075
• Add into modifier to the Factory and BuildFrom traits #26326

Transform

• LambdaLift: look for outer params in all owners #27029

Tuples

• Restore TupleXXL generic signatures for tuples longer than 22 #27120

Typeclass Derivation

• Support derivation for self-based type classes #26719

Typer

• Fixes for Java inherited statics #27178
• Don't lose type aliases under annotations in suppressInto #27085

Experimental: Capture Checking

• Make levelOK look at core capabilities #27170

Experimental: Explicit Nulls

• Drop null pattern warning #26967
• Fix isNullableClassAfterErasure for Null under AnyVal #26971
• Fix Java record unapply crash under explicit nulls #26975
• Fix #26994 : make isNotNull true for this and super #26996
• Represent FlexibleType using AppliedType #27004
• Cast pattern matcher throwaway plan to type check under explicit nulls #27052
• Add missing stripNulls to overload resolution of wildcard arguments #27053

Experimentals

• Expected type of literal is behind feature flag #27124

Contributors

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

According to git shortlog -sn --no-merges 3.10.0..3.10.1-RC1 these are:

    63	Solal Pirelli
    16	Wojciech Mazur
    12	Ondřej Lhoták
    11	dependabot[bot]
     9	Jan Chyb
     8	Jakub Warchoł
     8	Rikito Taniguchi
     6	Lukas Rytz
     6	Matt Bovel
     6	Piotr Chabelski
     5	Bartłomiej Kozak
     5	Martin Odersky
     5	Som Snytt
     4	Jamie Thompson
     4	Kenji Yoshida
     4	Mikołaj Fornal
     4	Sébastien Doeraene
     3	TATSUNO “Taz” Yasuhiro
     3	Tomasz Godzik
     3	Yao Xu
     2	Chua Chee Seng
     2	David Barri
     2	Guillaume Martres
     2	James You
     2	Oron Port
     2	cui fliter
     1	Anatolii Kmetiuk
     1	Jędrzej Rochala
     1	Natsu Kagami
     1	Oliver Bračevac
     1	Ondrej Lhotak
     1	Piotr Paradziński
     1	Puerco
     1	Zieliński Patryk
     1	myetcd
     1	noti0na1