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| 1 | +This is a fast-track release to replace a broken release 3.6.0 that occurred during the Scala 3.6.0-RC1 release. It might contain bugs that would be fixed during the Release Candidate bugfixes period. We recommend waiting for the stable Scala 3.6.2 release. |
| 2 | + |
| 3 | +Scala 3.6.0 should be never used to produce libraries. TASTy files produced by this version of compiler are produced in the experimental mode. These outputs are not compatible with consumers using stable versions of the compiler. |
| 4 | + |
| 5 | +# Highlights of the release |
| 6 | + |
| 7 | +- Stabilise SIP-47 (Adding Clause Interleaving to method definitions) [#20861](https://github.com/scala/scala3/pull/20861) |
| 8 | +- Implement SIP-57 - add runtimeChecked method and annotation [#20987](https://github.com/scala/scala3/pull/20987) |
| 9 | +- Implement SIP-62 - For comprehension improvements [#20522](https://github.com/scala/scala3/pull/20522) |
| 10 | +- Implement SIP-64 as non-experimental [#21668](https://github.com/scala/scala3/pull/21668) |
| 11 | +- Make named tuples a standard feature [#21680](https://github.com/scala/scala3/pull/21680) |
| 12 | +- Switch mapping of context bounds to using clauses in 3.6 [#21257](https://github.com/scala/scala3/pull/21257) |
| 13 | +- Require named arguments for java defined annotations [#21329](https://github.com/scala/scala3/pull/21329) |
| 14 | + |
| 15 | +# Other changes and fixes |
| 16 | + |
| 17 | +## Annotations |
| 18 | + |
| 19 | +- Tighten java annot value parsing [#21650](https://github.com/scala/scala3/pull/21650) |
| 20 | + |
| 21 | +## Dependencies |
| 22 | + |
| 23 | +- REPL: JLine 3.27.0 (was 3.25.1) [#21752](https://github.com/scala/scala3/pull/21752) |
| 24 | +- Scala 2.13.15 (was .14) [#21648](https://github.com/scala/scala3/pull/21648) |
| 25 | + |
| 26 | +## Erasure |
| 27 | + |
| 28 | +- Fixes IllegalAccessError with Java package protected class [#21362](https://github.com/scala/scala3/pull/21362) |
| 29 | + |
| 30 | +## Experimental: Capture Checking |
| 31 | + |
| 32 | +- Existential Capabilities [#20566](https://github.com/scala/scala3/pull/20566) |
| 33 | +- Fix setup of CapSet arguments. [#21309](https://github.com/scala/scala3/pull/21309) |
| 34 | +- Check all top-level covariant capture sets in checkNotUniversal [#21428](https://github.com/scala/scala3/pull/21428) |
| 35 | +- Charge also dcs of local reaches to capture set of enclosing method [#21443](https://github.com/scala/scala3/pull/21443) |
| 36 | +- No need to unbox if expected type is LhsProto [#21508](https://github.com/scala/scala3/pull/21508) |
| 37 | +- Treat more closure parameter types as inferred [#21583](https://github.com/scala/scala3/pull/21583) |
| 38 | +- Fixes for cleanup retains scheme [#21350](https://github.com/scala/scala3/pull/21350) |
| 39 | +- Improve Contains handling [#21361](https://github.com/scala/scala3/pull/21361) |
| 40 | +- Expand Capability types T to T^ only if no explicit capture set is given [#21375](https://github.com/scala/scala3/pull/21375) |
| 41 | +- Tighten closure extractor in TreeInfo [#21621](https://github.com/scala/scala3/pull/21621) |
| 42 | + |
| 43 | +## Experimental: Strict Equality |
| 44 | + |
| 45 | +- Fix #21392: Adjust `canComparePredefined(Nothing, T)` in explicit nulls [#21504](https://github.com/scala/scala3/pull/21504) |
| 46 | +- Add tracking of NotNullInfo for Match, Case, Try trees (fix #21380) [#21389](https://github.com/scala/scala3/pull/21389) |
| 47 | + |
| 48 | +## Experimental: Modularity |
| 49 | + |
| 50 | +- Revised given syntax [#21208](https://github.com/scala/scala3/pull/21208) |
| 51 | + |
| 52 | +## Experimental: Global Initialization |
| 53 | + |
| 54 | +- Analyze object when selecting from package [#21511](https://github.com/scala/scala3/pull/21511) |
| 55 | +- Fix bug in init checker while compiling scodec-bits community project [#21574](https://github.com/scala/scala3/pull/21574) |
| 56 | + |
| 57 | +## Experimentals |
| 58 | + |
| 59 | +- [experimental feature] Support HOAS pattern with type variables for quote pattern matching [#18271](https://github.com/scala/scala3/pull/18271) |
| 60 | + |
| 61 | +## Exports |
| 62 | + |
| 63 | +- Re-use attachment in exportForwarders to handle ambiguous overloads [#21518](https://github.com/scala/scala3/pull/21518) |
| 64 | +- Allow export statements in AnyVal [#21653](https://github.com/scala/scala3/pull/21653) |
| 65 | + |
| 66 | +## Extension Methods |
| 67 | + |
| 68 | +- Make right assoc ext method fwd refs error [#21641](https://github.com/scala/scala3/pull/21641) |
| 69 | + |
| 70 | +## Inline |
| 71 | + |
| 72 | +- Fix: throw an error before assigning ErrorType when expanding constValue [#21364](https://github.com/scala/scala3/pull/21364) |
| 73 | + |
| 74 | +## Implicits |
| 75 | + |
| 76 | +- Fix prioritization of `given`s over `implicit`s [#21226](https://github.com/scala/scala3/pull/21226) |
| 77 | + |
| 78 | +## JVM backend |
| 79 | + |
| 80 | +- Backend computes line number from source of position [#21763](https://github.com/scala/scala3/pull/21763) |
| 81 | + |
| 82 | +## Linting |
| 83 | + |
| 84 | +- CheckUnused checks type param annotations [#20549](https://github.com/scala/scala3/pull/20549) |
| 85 | + |
| 86 | +## Library |
| 87 | + |
| 88 | +- Finalize named tuples [#21710](https://github.com/scala/scala3/pull/21710) |
| 89 | + |
| 90 | +## Match Types |
| 91 | + |
| 92 | +- Enable betterMatchTypeExtractors in >= 3.6 [#21198](https://github.com/scala/scala3/pull/21198) |
| 93 | +- Do not propagate `TypeError`s of ops from `TypeComparer#tryAlso` [#21070](https://github.com/scala/scala3/pull/21070) |
| 94 | +- Fix #21402: Always allow type member extraction for stable scrutinees in match types. [#21700](https://github.com/scala/scala3/pull/21700) |
| 95 | +- Add a 3.6-migration warning for MT lubbing [#21336](https://github.com/scala/scala3/pull/21336) |
| 96 | +- Always interpret underscores inside patterns as type bounds [#21718](https://github.com/scala/scala3/pull/21718) |
| 97 | + |
| 98 | +## Opaque Types |
| 99 | + |
| 100 | +- Capture the kse3 issue in test cases and close it [#21260](https://github.com/scala/scala3/pull/21260) |
| 101 | + |
| 102 | +## Parser |
| 103 | + |
| 104 | +- Guard against recursive lower bounds in constraints [#21587](https://github.com/scala/scala3/pull/21587) |
| 105 | + |
| 106 | +## Pattern Matching |
| 107 | + |
| 108 | +- Fix a bundle of patmat issues [#21000](https://github.com/scala/scala3/pull/21000) |
| 109 | + |
| 110 | +## Pickling |
| 111 | + |
| 112 | +- Some fixes for AnnotatedTypes mapping [#19957](https://github.com/scala/scala3/pull/19957) |
| 113 | + |
| 114 | +## Polyfunctions |
| 115 | + |
| 116 | +- Fix: Check if a PolyFunction TypeTree has no ByName parameters [#21671](https://github.com/scala/scala3/pull/21671) |
| 117 | + |
| 118 | +## Presentation Compiler |
| 119 | + |
| 120 | +- Add regression test for issue 18726 [#20318](https://github.com/scala/scala3/pull/20318) |
| 121 | +- Remove artificial `CURSOR` added to code in the completions [#20899](https://github.com/scala/scala3/pull/20899) |
| 122 | +- Fix autoimports with using directives [#21590](https://github.com/scala/scala3/pull/21590) |
| 123 | + |
| 124 | +## Quotes |
| 125 | + |
| 126 | +- Handle suspension due to macro call in arbitrary phases [#21651](https://github.com/scala/scala3/pull/21651) |
| 127 | +- Have a better error message when healing types [#21711](https://github.com/scala/scala3/pull/21711) |
| 128 | +- Bound TypeRepr by Matchable in Quotes [#21377](https://github.com/scala/scala3/pull/21377) |
| 129 | +- Expr#show: Don't crash when the expression contains an unsupported type (like a SkolemType) [#20494](https://github.com/scala/scala3/pull/20494) |
| 130 | + |
| 131 | +## Reflection |
| 132 | + |
| 133 | +- Add the possibility to create a typeSymbol in the Quotes API [#20347](https://github.com/scala/scala3/pull/20347) |
| 134 | +- Fix stale symbols connected to lazy vals in macros [#21559](https://github.com/scala/scala3/pull/21559) |
| 135 | + |
| 136 | +## Reporting |
| 137 | + |
| 138 | +- Add better error reporting for inlined non-immutable paths [#21639](https://github.com/scala/scala3/pull/21639) |
| 139 | +- Only replace *new* errors by warnings under `-migration` [#21289](https://github.com/scala/scala3/pull/21289) |
| 140 | + |
| 141 | +## REPL |
| 142 | + |
| 143 | +- Ignore best effort settings in repl and update docs [#21540](https://github.com/scala/scala3/pull/21540) |
| 144 | + |
| 145 | +## Rewrites |
| 146 | + |
| 147 | +- Remove empty argument lists for classes with only context bounds [#21513](https://github.com/scala/scala3/pull/21513) |
| 148 | +- Fix rewrite logic for old `<function> _` syntax [#21715](https://github.com/scala/scala3/pull/21715) |
| 149 | +- Remove the `-rewrite` option for `typechecks` methods in Quotes [#21547](https://github.com/scala/scala3/pull/21547) |
| 150 | +- Add migration rewrite for non-named arguments in Java annotations [#21397](https://github.com/scala/scala3/pull/21397) |
| 151 | + |
| 152 | +## Scaladoc |
| 153 | + |
| 154 | +- Only trim one newline when preprocessing the content of a markdown code snippet [#21519](https://github.com/scala/scala3/pull/21519) |
| 155 | +- Filter opaque modifier from object documentation [#21640](https://github.com/scala/scala3/pull/21640) |
| 156 | +- Bump Inkuire version to fix it for the new Scala versions [#21611](https://github.com/scala/scala3/pull/21611) |
| 157 | + |
| 158 | +## Standard Library |
| 159 | + |
| 160 | +- Move `NamedTuple.head` to `NamedTupleDecomposition` [#21308](https://github.com/scala/scala3/pull/21308) |
| 161 | +- Define binary symbolic compiletime ops as `infix` [#21683](https://github.com/scala/scala3/pull/21683) |
| 162 | + |
| 163 | +## Transform |
| 164 | + |
| 165 | +- Fix treatment of separately compiled @native methods in FirstTransform [#21593](https://github.com/scala/scala3/pull/21593) |
| 166 | +- Three fixes to SAM type handling [#21596](https://github.com/scala/scala3/pull/21596) |
| 167 | +- Always rewrite empty List() to Nil [#21689](https://github.com/scala/scala3/pull/21689) |
| 168 | +- Add support for clauseInterleaving in JVM generic signatures [#21709](https://github.com/scala/scala3/pull/21709) |
| 169 | + |
| 170 | +## Typeclass Derivation |
| 171 | + |
| 172 | +- Nicer error message in case a `derived` method has an explicit term param [#21332](https://github.com/scala/scala3/pull/21332) |
| 173 | + |
| 174 | +## Typer |
| 175 | + |
| 176 | +- Calm param autotupling for overloads [#21552](https://github.com/scala/scala3/pull/21552) |
| 177 | +- Survive inaccessible types when computing implicit scope [#21589](https://github.com/scala/scala3/pull/21589) |
| 178 | +- Avoid cyclic errors forcing default arg types [#21597](https://github.com/scala/scala3/pull/21597) |
| 179 | +- Fix incorrect caching with dependent method parameters [#21699](https://github.com/scala/scala3/pull/21699) |
| 180 | + |
| 181 | +# Contributors |
| 182 | + |
| 183 | +Thank you to all the contributors who made this release possible 🎉 |
| 184 | + |
| 185 | +According to `git shortlog -sn --no-merges 3.5.2..3.6.1` these are: |
| 186 | + |
| 187 | +``` |
| 188 | + 129 Martin Odersky |
| 189 | + 35 Hamza REMMAL |
| 190 | + 34 Dale Wijnand |
| 191 | + 31 Eugene Flesselle |
| 192 | + 31 Hamza Remmal |
| 193 | + 30 Wojciech Mazur |
| 194 | + 15 Kacper Korban |
| 195 | + 12 Jamie Thompson |
| 196 | + 11 Jan Chyb |
| 197 | + 11 Katarzyna Marek |
| 198 | + 9 noti0na1 |
| 199 | + 9 rochala |
| 200 | + 8 Adrien Piquerez |
| 201 | + 8 Matt Bovel |
| 202 | + 7 Som Snytt |
| 203 | + 7 dependabot[bot] |
| 204 | + 6 Yichen Xu |
| 205 | + 5 EnzeXing |
| 206 | + 5 Fengyun Liu |
| 207 | + 5 Guillaume Martres |
| 208 | + 5 Sébastien Doeraene |
| 209 | + 4 Tomasz Godzik |
| 210 | + 4 kasiaMarek |
| 211 | + 3 Martin Duhem |
| 212 | + 3 Oliver Bracevac |
| 213 | + 3 Piotr Chabelski |
| 214 | + 2 Aleksander Rainko |
| 215 | + 2 David Hua |
| 216 | + 2 Florian3k |
| 217 | + 2 Friendseeker |
| 218 | + 2 HarrisL2 |
| 219 | + 2 Joel Wilsson |
| 220 | + 2 Jędrzej Rochala |
| 221 | + 2 Kenji Yoshida |
| 222 | + 2 Seth Tisue |
| 223 | + 1 Eugene Yokota |
| 224 | + 1 Georgi Krastev |
| 225 | + 1 Kavin Satheeskumar |
| 226 | + 1 Lorenzo Gabriele |
| 227 | + 1 Michał Pałka |
| 228 | + 1 Michel Charpentier |
| 229 | + 1 Ondrej Lhotak |
| 230 | + 1 Raphael Jolly |
| 231 | + 1 Yuito Murase |
| 232 | + 1 crunchyfrog |
| 233 | + 1 friendseeker |
| 234 | + 1 philippus |
| 235 | +``` |
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