Logs - typelevel/fs2 - Community Build Dashboard

1##################################

2Clonning https://github.com/typelevel/fs2.git into /build/repo using revision v2.5.13

3##################################

4Note: switching to 'edf0c4f2e660360d1c1a8c5377ce32294de89238'.

5

6You are in 'detached HEAD' state. You can look around, make experimental

7changes and commit them, and you can discard any commits you make in this

8state without impacting any branches by switching back to a branch.

9

10If you want to create a new branch to retain commits you create, you may

11do so (now or later) by using -c with the switch command. Example:

12

13 git switch -c <new-branch-name>

14

15Or undo this operation with:

16

17 git switch -

18

19Turn off this advice by setting config variable advice.detachedHead to false

20

21Using target Scala version for migration: 3.7.4

22Migrating project for -source:3.4 using Scala 3.7.4

23----

24Preparing build for 3.7.4

25Would try to apply common scalacOption (best-effort, sbt/mill only):

26Append: -rewrite,REQUIRE:-source:3.4-migration

27Remove: -indent,-no-indent,-new-syntax,,-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e

28----

29Starting build for 3.7.4

30Execute tests: false

31sbt project found:

32No prepare script found for project typelevel/fs2

33##################################

34Scala version: 3.7.4

35Targets: co.fs2%fs2-core co.fs2%fs2-experimental co.fs2%fs2-io co.fs2%fs2-reactive-streams

36Project projectConfig: {"projects":{"exclude":[],"overrides":{}},"java":{"version":"17"},"sbt":{"commands":[],"options":[]},"mill":{"options":[]},"tests":"compile-only","migrationVersions":["3.4","3.7"],"sourcePatches":[]}

37##################################

38Using extra scalacOptions: -rewrite,REQUIRE:-source:3.4-migration

39Filtering out scalacOptions: -indent,-no-indent,-new-syntax,,-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e

40[sbt_options] declare -a sbt_options=()

41[process_args] java_version = '17'

42[copyRt] java9_rt = '/root/.sbt/1.0/java9-rt-ext-eclipse_adoptium_17_0_8/rt.jar'

43# Executing command line:

44java

45-Dfile.encoding=UTF-8

46-Xms2g

47-Xmx4g

48-XX:MaxMetaspaceSize=512m

49-Dcommunitybuild.scala=3.7.4

50-Dcommunitybuild.project.dependencies.add=

51-Xmx7G

52-Xms4G

53-Xss8M

54-Dsbt.script=/root/.sdkman/candidates/sbt/current/bin/sbt

55-Dscala.ext.dirs=/root/.sbt/1.0/java9-rt-ext-eclipse_adoptium_17_0_8

56-jar

57/root/.sdkman/candidates/sbt/1.11.5/bin/sbt-launch.jar

58"setCrossScalaVersions 3.7.4"

59"++3.7.4 -v"

60"mapScalacOptions "-rewrite,REQUIRE:-source:3.4-migration,-Wconf:msg=can be rewritten automatically under:s" "-indent,-no-indent,-new-syntax,,-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e""

61"set every credentials := Nil"

62"excludeLibraryDependency com.github.ghik:zerowaste_{scalaVersion} com.olegpy:better-monadic-for_3 org.polyvariant:better-tostring_{scalaVersion} org.wartremover:wartremover_{scalaVersion}"

63"removeScalacOptionsStartingWith -P:wartremover"

64

65moduleMappings

66"runBuild 3.7.4 """{"projects":{"exclude":[],"overrides":{}},"java":{"version":"17"},"sbt":{"commands":[],"options":[]},"mill":{"options":[]},"tests":"compile-only","migrationVersions":["3.4","3.7"],"sourcePatches":[]}""" co.fs2%fs2-core co.fs2%fs2-experimental co.fs2%fs2-io co.fs2%fs2-reactive-streams"

67

68[info] [launcher] getting org.scala-sbt sbt 1.11.6 (this may take some time)...

69[info] welcome to sbt 1.11.6 (Eclipse Adoptium Java 17.0.8)

70[info] loading settings for project repo-build from akka.sbt, plugins.sbt...

71[info] loading project definition from /build/repo/project

72[info] compiling 2 Scala sources to /build/repo/project/target/scala-2.12/sbt-1.0/classes ...

73[info] Non-compiled module 'compiler-bridge_2.12' for Scala 2.12.20. Compiling...

74[info] Compilation completed in 9.069s.

75[info] done compiling

76[info] loading settings for project root from build.sbt...

77[info] set current project to root (in build file:/build/repo/)

78Execute setCrossScalaVersions: 3.7.4

79OpenCB::Limitting incorrect crossVersions List() -> List(2.13.16) in root/crossScalaVersions

80OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in rootJS/crossScalaVersions

81OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in rootJVM/crossScalaVersions

82OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in rootNative/crossScalaVersions

83OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in benchmark/crossScalaVersions

84OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in coreJVM/crossScalaVersions

85OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in experimental/crossScalaVersions

86OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in reactiveStreams/crossScalaVersions

87OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in io/crossScalaVersions

88OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in coreJS/crossScalaVersions

89[info] set current project to root (in build file:/build/repo/)

90[info] Setting Scala version to 3.7.4 on 9 projects.

91[info] Switching Scala version on:

92[info] experimental (3.7.4, 2.12.20, 2.13.16)

93[info] rootJS (3.7.4, 2.12.20, 2.13.16)

94[info] coreJS (3.7.4, 2.12.20, 2.13.16)

95[info] coreJVM (3.7.4, 2.12.20, 2.13.16)

96[info] rootJVM (3.7.4, 2.12.20, 2.13.16)

97[info] rootNative (3.7.4, 2.12.20, 2.13.16)

98[info] io (3.7.4, 2.12.20, 2.13.16)

99[info] reactiveStreams (3.7.4, 2.12.20, 2.13.16)

100[info] benchmark (3.7.4, 2.12.20, 2.13.16)

101[info] Excluding projects:

102[info] * root (2.13.16)

103[info] Reapplying settings...

104[info] set current project to root (in build file:/build/repo/)

105Execute mapScalacOptions: -rewrite,REQUIRE:-source:3.4-migration,-Wconf:msg=can be rewritten automatically under:s -indent,-no-indent,-new-syntax,,-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e

106[info] Reapplying settings...

107[info] set current project to root (in build file:/build/repo/)

108[info] Defining Global / credentials, benchmark / credentials and 8 others.

109[info] The new values will be used by allCredentials, benchmark / allCredentials and 57 others.

110[info] Run `last` for details.

111[info] Reapplying settings...

112[info] set current project to root (in build file:/build/repo/)

113Execute excludeLibraryDependency: com.github.ghik:zerowaste_{scalaVersion} com.olegpy:better-monadic-for_3 org.polyvariant:better-tostring_{scalaVersion} org.wartremover:wartremover_{scalaVersion}

114[info] Reapplying settings...

115OpenCB::Failed to reapply settings in excludeLibraryDependency: Reference to undefined setting:

116

117 Global / allExcludeDependencies from Global / allExcludeDependencies (CommunityBuildPlugin.scala:331)

118 Did you mean allExcludeDependencies ?

119 , retry without global scopes

120[info] Reapplying settings...

121[info] set current project to root (in build file:/build/repo/)

122Execute removeScalacOptionsStartingWith: -P:wartremover

123[info] Reapplying settings...

124[info] set current project to root (in build file:/build/repo/)

125[success] Total time: 0 s, completed Jan 3, 2026, 12:46:46 AM

126Build config: {"projects":{"exclude":[],"overrides":{}},"java":{"version":"17"},"sbt":{"commands":[],"options":[]},"mill":{"options":[]},"tests":"compile-only","migrationVersions":["3.4","3.7"],"sourcePatches":[]}

127Parsed config: Success(ProjectBuildConfig(ProjectsConfig(List(),Map()),CompileOnly,List()))

128Starting build...

129Projects: Set(coreJVM, experimental, io, reactiveStreams)

130Starting build for ProjectRef(file:/build/repo/,coreJVM) (fs2-core)... [0/4]

131OpenCB::Exclude Scala3 specific scalacOption `-rewrite` in Scala 2.12.20 module Global

132OpenCB::Exclude Scala3 specific scalacOption `REQUIRE:-source:3.4-migration` in Scala 2.12.20 module Global

133OpenCB::Filter out '-source:3.0-migration', matches setting pattern '^-?-source(:.*)?'

134Compile scalacOptions: -language:implicitConversions, -Ykind-projector, -rewrite, -Wconf:msg=can be rewritten automatically under:s, -source:3.4-migration

135[info] compiling 35 Scala sources to /build/repo/core/jvm/target/scala-3.7.4/classes ...

136[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

137[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Pull.scala:177:10 -------

138[warn] 177 | @nowarn("cat=unused-params")

139[warn] | ^^^^^^^^^^^^^^^^^^^

140[warn] | Invalid message filter

141[warn] | unknown category: unused-params

142[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1060:10 ----

143[warn] 1060 | @nowarn("cat=unused-params")

144[warn] | ^^^^^^^^^^^^^^^^^^^

145[warn] | Invalid message filter

146[warn] | unknown category: unused-params

147[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1098:10 ----

148[warn] 1098 | @nowarn("cat=unused-params")

149[warn] | ^^^^^^^^^^^^^^^^^^^

150[warn] | Invalid message filter

151[warn] | unknown category: unused-params

152[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1117:10 ----

153[warn] 1117 | @nowarn("cat=unused-params")

154[warn] | ^^^^^^^^^^^^^^^^^^^

155[warn] | Invalid message filter

156[warn] | unknown category: unused-params

157[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:2343:10 ----

158[warn] 2343 | @nowarn("cat=unused-params")

159[warn] | ^^^^^^^^^^^^^^^^^^^

160[warn] | Invalid message filter

161[warn] | unknown category: unused-params

162[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:3450:10 ----

163[warn] 3450 | @nowarn("cat=unused-params")

164[warn] | ^^^^^^^^^^^^^^^^^^^

165[warn] | Invalid message filter

166[warn] | unknown category: unused-params

167[warn] -- [E029] Pattern Match Exhaustivity Warning: /build/repo/core/shared/src/main/scala/fs2/internal/Algebra.scala:98:9

168[warn] 98 | ViewL(this) match {

169[warn] | ^^^^^^^^^^^

170[warn] | match may not be exhaustive.

171[warn] |

172[warn] | It would fail on pattern case: fs2.internal.FreeC.ViewL.View(_)

173[warn] |

174[warn] | longer explanation available when compiling with `-explain`

175[warn] -- [E092] Pattern Match Unchecked Warning: /build/repo/core/shared/src/main/scala/fs2/internal/Algebra.scala:697:17

176[warn] 697 | case output: Output[X] =>

177[warn] | ^

178[warn] |the type test for fs2.internal.FreeC.Output[X] cannot be checked at runtime because its type arguments can't be determined from fs2.internal.FreeC.Action[F, X, y]

179[warn] |

180[warn] | longer explanation available when compiling with `-explain`

181[info] [patched file /build/repo/core/shared/src/main/scala/fs2/internal/Algebra.scala]

182[info] [patched file /build/repo/core/shared/src/main/scala/fs2/Stream.scala]

183[info] [patched file /build/repo/core/shared/src/main/scala/fs2/internal/CompileScope.scala]

184[info] [patched file /build/repo/core/shared/src/main/scala/fs2/Chunk.scala]

185[info] [patched file /build/repo/core/shared/src/main/scala/fs2/internal/ScopedResource.scala]

186[info] [patched file /build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala]

187[info] [patched file /build/repo/core/shared/src/main/scala/fs2/text.scala]

188[info] [patched file /build/repo/core/shared/src/main/scala/fs2/Collector.scala]

189[info] [patched file /build/repo/core/jvm/src/main/scala/fs2/internal/AsyncByteArrayInputStream.scala]

190[warn] 9 warnings found

191[info] done compiling

192[info] compiling 9 Scala sources to /build/repo/core/jvm/target/scala-3.7.4/classes ...

193[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

194/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

195 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

196 ^

197[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1060:10 ----

198[warn] 1060 | @nowarn("cat=unused-params")

199[warn] | ^^^^^^^^^^^^^^^^^^^

200[warn] | Invalid message filter

201[warn] | unknown category: unused-params

202[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1098:10 ----

203[warn] 1098 | @nowarn("cat=unused-params")

204[warn] | ^^^^^^^^^^^^^^^^^^^

205[warn] | Invalid message filter

206[warn] | unknown category: unused-params

207[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1117:10 ----

208[warn] 1117 | @nowarn("cat=unused-params")

209[warn] | ^^^^^^^^^^^^^^^^^^^

210[warn] | Invalid message filter

211[warn] | unknown category: unused-params

212[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:2343:10 ----

213[warn] 2343 | @nowarn("cat=unused-params")

214[warn] | ^^^^^^^^^^^^^^^^^^^

215[warn] | Invalid message filter

216[warn] | unknown category: unused-params

217[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:3450:10 ----

218[warn] 3450 | @nowarn("cat=unused-params")

219[warn] | ^^^^^^^^^^^^^^^^^^^

220[warn] | Invalid message filter

221[warn] | unknown category: unused-params

222[warn] -- [E029] Pattern Match Exhaustivity Warning: /build/repo/core/shared/src/main/scala/fs2/internal/Algebra.scala:98:9

223[warn] 98 | ViewL(this) match {

224[warn] | ^^^^^^^^^^^

225[warn] | match may not be exhaustive.

226[warn] |

227[warn] | It would fail on pattern case: fs2.internal.FreeC.ViewL.View(_)

228[warn] |

229[warn] | longer explanation available when compiling with `-explain`

230[warn] -- [E092] Pattern Match Unchecked Warning: /build/repo/core/shared/src/main/scala/fs2/internal/Algebra.scala:697:17

231[warn] 697 | case output: Output[X] =>

232[warn] | ^

233[warn] |the type test for fs2.internal.FreeC.Output[X] cannot be checked at runtime because its type arguments can't be determined from fs2.internal.FreeC.Action[F, X, y]

234[warn] |

235[warn] | longer explanation available when compiling with `-explain`

236[warn] 8 warnings found

237[info] done compiling

238[info] compiling 14 Scala sources to /build/repo/core/jvm/target/scala-3.7.4/classes ...

239[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

240[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Pull.scala:177:10 -------

241[warn] 177 | @nowarn("cat=unused-params")

242[warn] | ^^^^^^^^^^^^^^^^^^^

243[warn] | Invalid message filter

244[warn] | unknown category: unused-params

245[warn] 10 warnings found

246[info] done compiling

247[info] compiling 42 Scala sources to /build/repo/core/jvm/target/scala-3.7.4/test-classes ...

248[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

249[info] [patched file /build/repo/core/shared/src/test/scala/fs2/ChunkQueueSuite.scala]

250[info] [patched file /build/repo/core/shared/src/test/scala/fs2/concurrent/BroadcastSuite.scala]

251[info] [patched file /build/repo/core/shared/src/test/scala/fs2/TextSuite.scala]

252[info] [patched file /build/repo/core/shared/src/test/scala/fs2/ChunkSuite.scala]

253[info] [patched file /build/repo/core/shared/src/test/scala/fs2/ChunkGenerators.scala]

254[info] [patched file /build/repo/core/jvm/target/scala-3.7.4/src_managed/test/fs2/StreamDoctest.scala]

255[warn] one warning found

256[info] done compiling

257/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

258 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

259 ^

260[info] compiling 5 Scala sources to /build/repo/core/jvm/target/scala-3.7.4/test-classes ...

261[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

262[warn] one warning found

263[info] done compiling

264[info] compiling 42 Scala sources to /build/repo/core/jvm/target/scala-3.7.4/test-classes ...

265[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

266[info] [patched file /build/repo/core/jvm/target/scala-3.7.4/src_managed/test/fs2/StreamDoctest.scala]

267[warn] two warnings found

268[info] done compiling

269/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

270 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

271 ^

272Starting build for ProjectRef(file:/build/repo/,experimental) (fs2-experimental)... [1/4]

273Compile scalacOptions: -language:implicitConversions, -Ykind-projector, -rewrite, -Wconf:msg=can be rewritten automatically under:s, -source:3.4-migration

274[info] compiling 2 Scala sources to /build/repo/experimental/target/scala-3.7.4/classes ...

275[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

276[warn] one warning found

277[info] done compiling

278/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

279 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

280 ^

281/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

282 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

283 ^

284/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

285 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

286 ^

287Starting build for ProjectRef(file:/build/repo/,io) (fs2-io)... [2/4]

288Compile scalacOptions: -language:implicitConversions, -Ykind-projector, -rewrite, -Wconf:msg=can be rewritten automatically under:s, -source:3.4-migration

289[info] compiling 27 Scala sources to /build/repo/io/target/scala-3.7.4/classes ...

290[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

291[warn] -- Warning: /build/repo/io/src/main/scala/fs2/io/file/WriteCursor.scala:96:10 --

292[warn] 96 | @nowarn("cat=unused-params")

293[warn] | ^^^^^^^^^^^^^^^^^^^

294[warn] | Invalid message filter

295[warn] | unknown category: unused-params

296[info] [patched file /build/repo/io/src/main/scala/fs2/io/file/Watcher.scala]

297[info] [patched file /build/repo/io/src/main/scala/fs2/io/internal/Synchronizer.scala]

298[info] [patched file /build/repo/io/src/main/scala/fs2/io/file/FileHandle.scala]

299[info] [patched file /build/repo/io/src/main/scala/fs2/io/tcp/SocketGroup.scala]

300[info] [patched file /build/repo/io/src/main/scala/fs2/io/internal/PipedStreamBuffer.scala]

301[info] [patched file /build/repo/io/src/main/scala/fs2/io/file/file.scala]

302[warn] two warnings found

303[info] done compiling

304[info] compiling 6 Scala sources to /build/repo/io/target/scala-3.7.4/classes ...

305[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

306/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

307 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

308 ^

309[warn] one warning found

310[info] done compiling

311[info] compiling 12 Scala sources to /build/repo/io/target/scala-3.7.4/test-classes ...

312[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

313[warn] one warning found

314[info] done compiling

315/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

316 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

317 ^

318/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

319 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

320 ^

321Starting build for ProjectRef(file:/build/repo/,reactiveStreams) (fs2-reactive-streams)... [3/4]

322Compile scalacOptions: -language:implicitConversions, -Ykind-projector, -rewrite, -Wconf:msg=can be rewritten automatically under:s, -source:3.4-migration

323[info] compiling 4 Scala sources to /build/repo/reactive-streams/target/scala-3.7.4/classes ...

324[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

325[info] [patched file /build/repo/reactive-streams/src/main/scala/fs2/interop/reactivestreams/StreamUnicastPublisher.scala]

326[warn] one warning found

327[info] done compiling

328/build/repo/reactive-streams/src/main/scala/fs2/interop/reactivestreams/StreamUnicastPublisher.scala:39: error: ] expected but >: found

329 def subscribe(subscriber: Subscriber[? >: A]): Unit = {

330 ^

331[info] compiling 1 Scala source to /build/repo/reactive-streams/target/scala-3.7.4/classes ...

332[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

333[warn] one warning found

334[info] done compiling

335/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

336 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

337 ^

338[info] compiling 6 Scala sources to /build/repo/reactive-streams/target/scala-3.7.4/test-classes ...

339[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

340[info] [patched file /build/repo/reactive-streams/src/test/scala/fs2/interop/reactivestreams/StreamUnicastPublisherSpec.scala]

341[info] [patched file /build/repo/reactive-streams/src/test/scala/fs2/interop/reactivestreams/SubscriberStabilitySpec.scala]

342[info] [patched file /build/repo/reactive-streams/src/test/scala/fs2/interop/reactivestreams/SubscriberSpec.scala]

343[warn] one warning found

344[info] done compiling

345/build/repo/reactive-streams/src/main/scala/fs2/interop/reactivestreams/StreamUnicastPublisher.scala:39: error: ] expected but >: found

346 def subscribe(subscriber: Subscriber[? >: A]): Unit = {

347 ^

348/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

349 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

350 ^

351[info] compiling 3 Scala sources to /build/repo/reactive-streams/target/scala-3.7.4/test-classes ...

352[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

353[warn] one warning found

354[info] done compiling

355/build/repo/reactive-streams/src/main/scala/fs2/interop/reactivestreams/StreamUnicastPublisher.scala:39: error: ] expected but >: found

356 def subscribe(subscriber: Subscriber[? >: A]): Unit = {

357 ^

358/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

359 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

360 ^

361

362************************

363Build summary:

364[{

365 "module": "fs2-core",

366 "compile": {"status": "ok", "tookMs": 28281, "warnings": 8, "errors": 0, "sourceVersion": "3.4-migration"},

367 "doc": {"status": "skipped", "tookMs": 0, "files": 0, "totalSizeKb": 0},

368 "test-compile": {"status": "ok", "tookMs": 37711, "warnings": 0, "errors": 0, "sourceVersion": "3.4-migration"},

369 "test": {"status": "skipped", "tookMs": 0, "passed": 0, "failed": 0, "ignored": 0, "skipped": 0, "total": 0, "byFramework": []},

370 "publish": {"status": "skipped", "tookMs": 0},

371 "metadata": {

372 "crossScalaVersions": ["3.0.2", "2.12.20", "2.13.16"]

373}

374},{

375 "module": "fs2-experimental",

376 "compile": {"status": "ok", "tookMs": 732, "warnings": 0, "errors": 0, "sourceVersion": "3.4-migration"},

377 "doc": {"status": "skipped", "tookMs": 0, "files": 0, "totalSizeKb": 0},

378 "test-compile": {"status": "ok", "tookMs": 1130, "warnings": 0, "errors": 0, "sourceVersion": "3.4-migration"},

379 "test": {"status": "skipped", "tookMs": 0, "passed": 0, "failed": 0, "ignored": 0, "skipped": 0, "total": 0, "byFramework": []},

380 "publish": {"status": "skipped", "tookMs": 0},

381 "metadata": {

382 "crossScalaVersions": ["3.0.2", "2.12.20", "2.13.16"]

383}

384},{

385 "module": "fs2-io",

386 "compile": {"status": "ok", "tookMs": 2390, "warnings": 1, "errors": 0, "sourceVersion": "3.4-migration"},

387 "doc": {"status": "skipped", "tookMs": 0, "files": 0, "totalSizeKb": 0},

388 "test-compile": {"status": "ok", "tookMs": 3577, "warnings": 0, "errors": 0, "sourceVersion": "3.4-migration"},

389 "test": {"status": "skipped", "tookMs": 0, "passed": 0, "failed": 0, "ignored": 0, "skipped": 0, "total": 0, "byFramework": []},

390 "publish": {"status": "skipped", "tookMs": 0},

391 "metadata": {

392 "crossScalaVersions": ["3.0.2", "2.12.20", "2.13.16"]

393}

394},{

395 "module": "fs2-reactive-streams",

396 "compile": {"status": "ok", "tookMs": 1055, "warnings": 0, "errors": 0, "sourceVersion": "3.4-migration"},

397 "doc": {"status": "skipped", "tookMs": 0, "files": 0, "totalSizeKb": 0},

398 "test-compile": {"status": "ok", "tookMs": 2190, "warnings": 0, "errors": 0, "sourceVersion": "3.4-migration"},

399 "test": {"status": "skipped", "tookMs": 0, "passed": 0, "failed": 0, "ignored": 0, "skipped": 0, "total": 0, "byFramework": []},

400 "publish": {"status": "skipped", "tookMs": 0},

401 "metadata": {

402 "crossScalaVersions": ["3.0.2", "2.12.20", "2.13.16"]

403}

404}]

405************************

406[success] Total time: 101 s (0:01:41.0), completed Jan 3, 2026, 12:48:27 AM

407[0JChecking patch project/plugins.sbt...

408Checking patch build.sbt...

409Applied patch project/plugins.sbt cleanly.

410Applied patch build.sbt cleanly.

411Commit migration rewrites

412Switched to a new branch 'opencb/migrate-source-3.4'

413[opencb/migrate-source-3.4 ce0544805] Apply Scala compiler rewrites using -source:3.4-migration using Scala 3.7.4

414 24 files changed, 111 insertions(+), 111 deletions(-)

415Using target Scala version for migration: 3.7.4

416Migrating project for -source:3.7 using Scala 3.7.4

417----

418Preparing build for 3.7.4

419Would try to apply common scalacOption (best-effort, sbt/mill only):

420Append: -rewrite,REQUIRE:-source:3.7-migration

421Remove: -indent,-no-indent,-new-syntax,,-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e

422----

423Starting build for 3.7.4

424Execute tests: false

425sbt project found:

426No prepare script found for project typelevel/fs2

427##################################

428Scala version: 3.7.4

429Targets: co.fs2%fs2-core co.fs2%fs2-experimental co.fs2%fs2-io co.fs2%fs2-reactive-streams

430Project projectConfig: {"projects":{"exclude":[],"overrides":{}},"java":{"version":"17"},"sbt":{"commands":[],"options":[]},"mill":{"options":[]},"tests":"compile-only","migrationVersions":["3.4","3.7"],"sourcePatches":[]}

431##################################

432Using extra scalacOptions: -rewrite,REQUIRE:-source:3.7-migration

433Filtering out scalacOptions: -indent,-no-indent,-new-syntax,,-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e

434[sbt_options] declare -a sbt_options=()

435[process_args] java_version = '17'

436[copyRt] java9_rt = '/root/.sbt/1.0/java9-rt-ext-eclipse_adoptium_17_0_8/rt.jar'

437# Executing command line:

438java

439-Dfile.encoding=UTF-8

440-Xms2g

441-Xmx4g

442-XX:MaxMetaspaceSize=512m

443-Dcommunitybuild.scala=3.7.4

444-Dcommunitybuild.project.dependencies.add=

445-Xmx7G

446-Xms4G

447-Xss8M

448-Dsbt.script=/root/.sdkman/candidates/sbt/current/bin/sbt

449-Dscala.ext.dirs=/root/.sbt/1.0/java9-rt-ext-eclipse_adoptium_17_0_8

450-jar

451/root/.sdkman/candidates/sbt/1.11.5/bin/sbt-launch.jar

452"setCrossScalaVersions 3.7.4"

453"++3.7.4 -v"

454"mapScalacOptions "-rewrite,REQUIRE:-source:3.7-migration,-Wconf:msg=can be rewritten automatically under:s" "-indent,-no-indent,-new-syntax,,-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e""

455"set every credentials := Nil"

456"excludeLibraryDependency com.github.ghik:zerowaste_{scalaVersion} com.olegpy:better-monadic-for_3 org.polyvariant:better-tostring_{scalaVersion} org.wartremover:wartremover_{scalaVersion}"

457"removeScalacOptionsStartingWith -P:wartremover"

458

459moduleMappings

460"runBuild 3.7.4 """{"projects":{"exclude":[],"overrides":{}},"java":{"version":"17"},"sbt":{"commands":[],"options":[]},"mill":{"options":[]},"tests":"compile-only","migrationVersions":["3.4","3.7"],"sourcePatches":[]}""" co.fs2%fs2-core co.fs2%fs2-experimental co.fs2%fs2-io co.fs2%fs2-reactive-streams"

461

462[info] welcome to sbt 1.11.6 (Eclipse Adoptium Java 17.0.8)

463[info] loading settings for project repo-build from akka.sbt, plugins.sbt...

464[info] loading project definition from /build/repo/project

465[info] loading settings for project root from build.sbt...

466[info] set current project to root (in build file:/build/repo/)

467Execute setCrossScalaVersions: 3.7.4

468OpenCB::Limitting incorrect crossVersions List() -> List(2.13.16) in root/crossScalaVersions

469OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in rootJVM/crossScalaVersions

470OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in rootJS/crossScalaVersions

471OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in benchmark/crossScalaVersions

472OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in experimental/crossScalaVersions

473OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in coreJVM/crossScalaVersions

474OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in reactiveStreams/crossScalaVersions

475OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in coreJS/crossScalaVersions

476OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in io/crossScalaVersions

477OpenCB::Changing crossVersion 3.0.2 -> 3.7.4 in rootNative/crossScalaVersions

478[info] set current project to root (in build file:/build/repo/)

479[info] Setting Scala version to 3.7.4 on 9 projects.

480[info] Switching Scala version on:

481[info] experimental (3.7.4, 2.12.20, 2.13.16)

482[info] rootJS (3.7.4, 2.12.20, 2.13.16)

483[info] coreJS (3.7.4, 2.12.20, 2.13.16)

484[info] coreJVM (3.7.4, 2.12.20, 2.13.16)

485[info] rootJVM (3.7.4, 2.12.20, 2.13.16)

486[info] rootNative (3.7.4, 2.12.20, 2.13.16)

487[info] io (3.7.4, 2.12.20, 2.13.16)

488[info] reactiveStreams (3.7.4, 2.12.20, 2.13.16)

489[info] benchmark (3.7.4, 2.12.20, 2.13.16)

490[info] Excluding projects:

491[info] * root (2.13.16)

492[info] Reapplying settings...

493[info] set current project to root (in build file:/build/repo/)

494Execute mapScalacOptions: -rewrite,REQUIRE:-source:3.7-migration,-Wconf:msg=can be rewritten automatically under:s -indent,-no-indent,-new-syntax,,-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e

495[info] Reapplying settings...

496[info] set current project to root (in build file:/build/repo/)

497[info] Defining Global / credentials, benchmark / credentials and 8 others.

498[info] The new values will be used by allCredentials, benchmark / allCredentials and 57 others.

499[info] Run `last` for details.

500[info] Reapplying settings...

501[info] set current project to root (in build file:/build/repo/)

502Execute excludeLibraryDependency: com.github.ghik:zerowaste_{scalaVersion} com.olegpy:better-monadic-for_3 org.polyvariant:better-tostring_{scalaVersion} org.wartremover:wartremover_{scalaVersion}

503[info] Reapplying settings...

504OpenCB::Failed to reapply settings in excludeLibraryDependency: Reference to undefined setting:

505

506 Global / allExcludeDependencies from Global / allExcludeDependencies (CommunityBuildPlugin.scala:331)

507 Did you mean allExcludeDependencies ?

508 , retry without global scopes

509[info] Reapplying settings...

510[info] set current project to root (in build file:/build/repo/)

511Execute removeScalacOptionsStartingWith: -P:wartremover

512[info] Reapplying settings...

513[info] set current project to root (in build file:/build/repo/)

514[success] Total time: 0 s, completed Jan 3, 2026, 12:48:43 AM

515Build config: {"projects":{"exclude":[],"overrides":{}},"java":{"version":"17"},"sbt":{"commands":[],"options":[]},"mill":{"options":[]},"tests":"compile-only","migrationVersions":["3.4","3.7"],"sourcePatches":[]}

516Parsed config: Success(ProjectBuildConfig(ProjectsConfig(List(),Map()),CompileOnly,List()))

517Starting build...

518Projects: Set(coreJVM, experimental, io, reactiveStreams)

519Starting build for ProjectRef(file:/build/repo/,coreJVM) (fs2-core)... [0/4]

520OpenCB::Exclude Scala3 specific scalacOption `-rewrite` in Scala 2.12.20 module Global

521OpenCB::Exclude Scala3 specific scalacOption `REQUIRE:-source:3.7-migration` in Scala 2.12.20 module Global

522OpenCB::Filter out '-source:3.0-migration', matches setting pattern '^-?-source(:.*)?'

523Compile scalacOptions: -language:implicitConversions, -Ykind-projector, -rewrite, -Wconf:msg=can be rewritten automatically under:s, -source:3.7-migration

524[info] compiling 35 Scala sources to /build/repo/core/jvm/target/scala-3.7.4/classes ...

525[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

526[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Pull.scala:177:10 -------

527[warn] 177 | @nowarn("cat=unused-params")

528[warn] | ^^^^^^^^^^^^^^^^^^^

529[warn] | Invalid message filter

530[warn] | unknown category: unused-params

531[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1060:10 ----

532[warn] 1060 | @nowarn("cat=unused-params")

533[warn] | ^^^^^^^^^^^^^^^^^^^

534[warn] | Invalid message filter

535[warn] | unknown category: unused-params

536[warn] -- [E205] Potential Issue Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1062:26

537[warn] 1062 | evalMapChunk(o => f(o).as(o))

538[warn] | ^

539[warn] | Given search preference for cats.Functor[F2] between alternatives

540[warn] | (evidence$2 : cats.Applicative[F2])

541[warn] | and

542[warn] | (evidence$1 : cats.Functor[F2])

543[warn] | has changed.

544[warn] | Previous choice : the first alternative

545[warn] | Choice from Scala 3.7 : the second alternative

546[warn] |

547[warn] | Suppress this warning by choosing -source 3.5, -source 3.7, or

548[warn] | by using @annotation.nowarn("id=205")

549[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1098:10 ----

550[warn] 1098 | @nowarn("cat=unused-params")

551[warn] | ^^^^^^^^^^^^^^^^^^^

552[warn] | Invalid message filter

553[warn] | unknown category: unused-params

554[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1117:10 ----

555[warn] 1117 | @nowarn("cat=unused-params")

556[warn] | ^^^^^^^^^^^^^^^^^^^

557[warn] | Invalid message filter

558[warn] | unknown category: unused-params

559[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:2343:10 ----

560[warn] 2343 | @nowarn("cat=unused-params")

561[warn] | ^^^^^^^^^^^^^^^^^^^

562[warn] | Invalid message filter

563[warn] | unknown category: unused-params

564[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:3450:10 ----

565[warn] 3450 | @nowarn("cat=unused-params")

566[warn] | ^^^^^^^^^^^^^^^^^^^

567[warn] | Invalid message filter

568[warn] | unknown category: unused-params

569[warn] -- [E029] Pattern Match Exhaustivity Warning: /build/repo/core/shared/src/main/scala/fs2/internal/Algebra.scala:98:9

570[warn] 98 | ViewL(this) match {

571[warn] | ^^^^^^^^^^^

572[warn] | match may not be exhaustive.

573[warn] |

574[warn] | It would fail on pattern case: fs2.internal.FreeC.ViewL.View(_)

575[warn] |

576[warn] | longer explanation available when compiling with `-explain`

577[warn] -- [E092] Pattern Match Unchecked Warning: /build/repo/core/shared/src/main/scala/fs2/internal/Algebra.scala:697:17

578[warn] 697 | case output: Output[X] =>

579[warn] | ^

580[warn] |the type test for fs2.internal.FreeC.Output[X] cannot be checked at runtime because its type arguments can't be determined from fs2.internal.FreeC.Action[F, X, y]

581[warn] |

582[warn] | longer explanation available when compiling with `-explain`

583[info] [patched file /build/repo/core/shared/src/main/scala/fs2/Stream.scala]

584[info] [patched file /build/repo/core/jvm/src/main/scala/fs2/compress.scala]

585[info] [patched file /build/repo/core/jvm/src/main/scala/fs2/compression.scala]

586[warn] 10 warnings found

587[info] done compiling

588[info] compiling 3 Scala sources to /build/repo/core/jvm/target/scala-3.7.4/classes ...

589[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

590/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

591 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

592 ^

593/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

594 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

595 ^

596[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1060:10 ----

597[warn] 1060 | @nowarn("cat=unused-params")

598[warn] | ^^^^^^^^^^^^^^^^^^^

599[warn] | Invalid message filter

600[warn] | unknown category: unused-params

601[warn] -- [E205] Potential Issue Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1062:26

602[warn] 1062 | evalMapChunk(o => f(o).as(o))

603[warn] | ^

604[warn] | Given search preference for cats.Functor[F2] between alternatives

605[warn] | (evidence$2 : cats.Applicative[F2])

606[warn] | and

607[warn] | (evidence$1 : cats.Functor[F2])

608[warn] | has changed.

609[warn] | Previous choice : the first alternative

610[warn] | Choice from Scala 3.7 : the second alternative

611[warn] |

612[warn] | Suppress this warning by choosing -source 3.5, -source 3.7, or

613[warn] | by using @annotation.nowarn("id=205")

614[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1098:10 ----

615[warn] 1098 | @nowarn("cat=unused-params")

616[warn] | ^^^^^^^^^^^^^^^^^^^

617[warn] | Invalid message filter

618[warn] | unknown category: unused-params

619[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1117:10 ----

620[warn] 1117 | @nowarn("cat=unused-params")

621[warn] | ^^^^^^^^^^^^^^^^^^^

622[warn] | Invalid message filter

623[warn] | unknown category: unused-params

624[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:2343:10 ----

625[warn] 2343 | @nowarn("cat=unused-params")

626[warn] | ^^^^^^^^^^^^^^^^^^^

627[warn] | Invalid message filter

628[warn] | unknown category: unused-params

629[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:3450:10 ----

630[warn] 3450 | @nowarn("cat=unused-params")

631[warn] | ^^^^^^^^^^^^^^^^^^^

632[warn] | Invalid message filter

633[warn] | unknown category: unused-params

634[warn] 7 warnings found

635[info] done compiling

636[info] compiling 41 Scala sources to /build/repo/core/jvm/target/scala-3.7.4/test-classes ...

637[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

638[info] [patched file /build/repo/core/shared/src/test/scala/fs2/StreamZipSuite.scala]

639[info] [patched file /build/repo/core/shared/src/test/scala/fs2/Fs2Suite.scala]

640[warn] one warning found

641[info] done compiling

642/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

643 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

644 ^

645/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

646 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

647 ^

648[info] compiling 2 Scala sources to /build/repo/core/jvm/target/scala-3.7.4/test-classes ...

649[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

650[warn] one warning found

651[info] done compiling

652/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

653 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

654 ^

655/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

656 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

657 ^

658Starting build for ProjectRef(file:/build/repo/,experimental) (fs2-experimental)... [1/4]

659Compile scalacOptions: -language:implicitConversions, -Ykind-projector, -rewrite, -Wconf:msg=can be rewritten automatically under:s, -source:3.7-migration

660[info] compiling 2 Scala sources to /build/repo/experimental/target/scala-3.7.4/classes ...

661[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

662[warn] one warning found

663[info] done compiling

664/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

665 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

666 ^

667/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

668 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

669 ^

670/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

671 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

672 ^

673/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

674 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

675 ^

676/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

677 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

678 ^

679/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

680 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

681 ^

682Starting build for ProjectRef(file:/build/repo/,io) (fs2-io)... [2/4]

683Compile scalacOptions: -language:implicitConversions, -Ykind-projector, -rewrite, -Wconf:msg=can be rewritten automatically under:s, -source:3.7-migration

684[info] compiling 27 Scala sources to /build/repo/io/target/scala-3.7.4/classes ...

685[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

686[warn] -- Warning: /build/repo/io/src/main/scala/fs2/io/file/WriteCursor.scala:96:10 --

687[warn] 96 | @nowarn("cat=unused-params")

688[warn] | ^^^^^^^^^^^^^^^^^^^

689[warn] | Invalid message filter

690[warn] | unknown category: unused-params

691[warn] two warnings found

692[info] done compiling

693/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

694 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

695 ^

696/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

697 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

698 ^

699[info] compiling 12 Scala sources to /build/repo/io/target/scala-3.7.4/test-classes ...

700[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

701[warn] -- Warning: /build/repo/io/src/test/scala/fs2/io/IoSuite.scala:152:59 ----------

702[warn] 152 | Shrink.xmap[Int, ChunkSize](ChunkSize(_), _.value) {

703[warn] | ^

704[warn] |Implicit parameters should be provided with a `using` clause.

705[warn] |To disable the warning, please use the following option:

706[warn] | "-Wconf:msg=Implicit parameters should be provided with a `using` clause:s"

707[warn] 153 | Shrink.shrinkIntegral[Int].suchThat(_ > defaultPipedInputStreamBufferSize)

708[warn] 154 | }

709[warn] two warnings found

710[info] done compiling

711/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

712 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

713 ^

714/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

715 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

716 ^

717/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

718 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

719 ^

720/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

721 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

722 ^

723Starting build for ProjectRef(file:/build/repo/,reactiveStreams) (fs2-reactive-streams)... [3/4]

724Compile scalacOptions: -language:implicitConversions, -Ykind-projector, -rewrite, -Wconf:msg=can be rewritten automatically under:s, -source:3.7-migration

725[info] compiling 4 Scala sources to /build/repo/reactive-streams/target/scala-3.7.4/classes ...

726[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

727[warn] one warning found

728[info] done compiling

729/build/repo/reactive-streams/src/main/scala/fs2/interop/reactivestreams/StreamUnicastPublisher.scala:39: error: ] expected but >: found

730 def subscribe(subscriber: Subscriber[? >: A]): Unit = {

731 ^

732/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

733 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

734 ^

735/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

736 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

737 ^

738[info] compiling 6 Scala sources to /build/repo/reactive-streams/target/scala-3.7.4/test-classes ...

739[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

740[warn] one warning found

741[info] done compiling

742/build/repo/reactive-streams/src/main/scala/fs2/interop/reactivestreams/StreamUnicastPublisher.scala:39: error: ] expected but >: found

743 def subscribe(subscriber: Subscriber[? >: A]): Unit = {

744 ^

745/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

746 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

747 ^

748/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

749 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

750 ^

751/build/repo/reactive-streams/src/main/scala/fs2/interop/reactivestreams/StreamUnicastPublisher.scala:39: error: ] expected but >: found

752 def subscribe(subscriber: Subscriber[? >: A]): Unit = {

753 ^

754/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

755 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

756 ^

757/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

758 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

759 ^

760

761************************

762Build summary:

763[{

764 "module": "fs2-core",

765 "compile": {"status": "ok", "tookMs": 27820, "warnings": 9, "errors": 0, "sourceVersion": "3.7-migration"},

766 "doc": {"status": "skipped", "tookMs": 0, "files": 0, "totalSizeKb": 0},

767 "test-compile": {"status": "ok", "tookMs": 25664, "warnings": 0, "errors": 0, "sourceVersion": "3.7-migration"},

768 "test": {"status": "skipped", "tookMs": 0, "passed": 0, "failed": 0, "ignored": 0, "skipped": 0, "total": 0, "byFramework": []},

769 "publish": {"status": "skipped", "tookMs": 0},

770 "metadata": {

771 "crossScalaVersions": ["3.0.2", "2.12.20", "2.13.16"]

772}

773},{

774 "module": "fs2-experimental",

775 "compile": {"status": "ok", "tookMs": 845, "warnings": 0, "errors": 0, "sourceVersion": "3.7-migration"},

776 "doc": {"status": "skipped", "tookMs": 0, "files": 0, "totalSizeKb": 0},

777 "test-compile": {"status": "ok", "tookMs": 1147, "warnings": 0, "errors": 0, "sourceVersion": "3.7-migration"},

778 "test": {"status": "skipped", "tookMs": 0, "passed": 0, "failed": 0, "ignored": 0, "skipped": 0, "total": 0, "byFramework": []},

779 "publish": {"status": "skipped", "tookMs": 0},

780 "metadata": {

781 "crossScalaVersions": ["3.0.2", "2.12.20", "2.13.16"]

782}

783},{

784 "module": "fs2-io",

785 "compile": {"status": "ok", "tookMs": 3167, "warnings": 1, "errors": 0, "sourceVersion": "3.7-migration"},

786 "doc": {"status": "skipped", "tookMs": 0, "files": 0, "totalSizeKb": 0},

787 "test-compile": {"status": "ok", "tookMs": 3491, "warnings": 1, "errors": 0, "sourceVersion": "3.7-migration"},

788 "test": {"status": "skipped", "tookMs": 0, "passed": 0, "failed": 0, "ignored": 0, "skipped": 0, "total": 0, "byFramework": []},

789 "publish": {"status": "skipped", "tookMs": 0},

790 "metadata": {

791 "crossScalaVersions": ["3.0.2", "2.12.20", "2.13.16"]

792}

793},{

794 "module": "fs2-reactive-streams",

795 "compile": {"status": "ok", "tookMs": 1339, "warnings": 0, "errors": 0, "sourceVersion": "3.7-migration"},

796 "doc": {"status": "skipped", "tookMs": 0, "files": 0, "totalSizeKb": 0},

797 "test-compile": {"status": "ok", "tookMs": 2003, "warnings": 0, "errors": 0, "sourceVersion": "3.7-migration"},

798 "test": {"status": "skipped", "tookMs": 0, "passed": 0, "failed": 0, "ignored": 0, "skipped": 0, "total": 0, "byFramework": []},

799 "publish": {"status": "skipped", "tookMs": 0},

800 "metadata": {

801 "crossScalaVersions": ["3.0.2", "2.12.20", "2.13.16"]

802}

803}]

804************************

805[success] Total time: 77 s (0:01:17.0), completed Jan 3, 2026, 12:50:00 AM

806[0JChecking patch project/plugins.sbt...

807Checking patch build.sbt...

808Applied patch project/plugins.sbt cleanly.

809Applied patch build.sbt cleanly.

810Commit migration rewrites

811Switched to a new branch 'opencb/migrate-source-3.7'

812[opencb/migrate-source-3.7 29e9b4749] Apply Scala compiler rewrites using -source:3.7-migration using Scala 3.7.4

813 5 files changed, 10 insertions(+), 10 deletions(-)

814----

815Preparing build for 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY

816Scala binary version found: 3.8

817Implicitly using source version 3.8

818Scala binary version found: 3.8

819Implicitly using source version 3.8

820Would try to apply common scalacOption (best-effort, sbt/mill only):

821Append: ,REQUIRE:-source:3.8

822Remove: ,-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e

823----

824Starting build for 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY

825Execute tests: false

826sbt project found:

827No prepare script found for project typelevel/fs2

828##################################

829Scala version: 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY

830Targets: co.fs2%fs2-core co.fs2%fs2-experimental co.fs2%fs2-io co.fs2%fs2-reactive-streams

831Project projectConfig: {"projects":{"exclude":[],"overrides":{}},"java":{"version":"17"},"sbt":{"commands":[],"options":[]},"mill":{"options":[]},"tests":"compile-only","migrationVersions":["3.4","3.7"],"sourcePatches":[]}

832##################################

833Using extra scalacOptions: ,REQUIRE:-source:3.8

834Filtering out scalacOptions: ,-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e

835[sbt_options] declare -a sbt_options=()

836[process_args] java_version = '17'

837[copyRt] java9_rt = '/root/.sbt/1.0/java9-rt-ext-eclipse_adoptium_17_0_8/rt.jar'

838# Executing command line:

839java

840-Dfile.encoding=UTF-8

841-Xms2g

842-Xmx4g

843-XX:MaxMetaspaceSize=512m

844-Dcommunitybuild.scala=3.8.1-RC1-bin-20260102-32e416e-NIGHTLY

845-Dcommunitybuild.project.dependencies.add=

846-Xmx7G

847-Xms4G

848-Xss8M

849-Dsbt.script=/root/.sdkman/candidates/sbt/current/bin/sbt

850-Dscala.ext.dirs=/root/.sbt/1.0/java9-rt-ext-eclipse_adoptium_17_0_8

851-jar

852/root/.sdkman/candidates/sbt/1.11.5/bin/sbt-launch.jar

853"setCrossScalaVersions 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY"

854"++3.8.1-RC1-bin-20260102-32e416e-NIGHTLY -v"

855"mapScalacOptions ",REQUIRE:-source:3.8,-Wconf:msg=can be rewritten automatically under:s" ",-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e""

856"set every credentials := Nil"

857"excludeLibraryDependency com.github.ghik:zerowaste_{scalaVersion} com.olegpy:better-monadic-for_3 org.polyvariant:better-tostring_{scalaVersion} org.wartremover:wartremover_{scalaVersion}"

858"removeScalacOptionsStartingWith -P:wartremover"

859

860moduleMappings

861"runBuild 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY """{"projects":{"exclude":[],"overrides":{}},"java":{"version":"17"},"sbt":{"commands":[],"options":[]},"mill":{"options":[]},"tests":"compile-only","migrationVersions":["3.4","3.7"],"sourcePatches":[]}""" co.fs2%fs2-core co.fs2%fs2-experimental co.fs2%fs2-io co.fs2%fs2-reactive-streams"

862

863[info] welcome to sbt 1.11.6 (Eclipse Adoptium Java 17.0.8)

864[info] loading settings for project repo-build from akka.sbt, plugins.sbt...

865[info] loading project definition from /build/repo/project

866[info] loading settings for project root from build.sbt...

867[info] set current project to root (in build file:/build/repo/)

868Execute setCrossScalaVersions: 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY

869OpenCB::Limitting incorrect crossVersions List() -> List(2.13.16) in root/crossScalaVersions

870OpenCB::Changing crossVersion 3.0.2 -> 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY in rootNative/crossScalaVersions

871OpenCB::Changing crossVersion 3.0.2 -> 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY in rootJVM/crossScalaVersions

872OpenCB::Changing crossVersion 3.0.2 -> 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY in benchmark/crossScalaVersions

873OpenCB::Changing crossVersion 3.0.2 -> 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY in rootJS/crossScalaVersions

874OpenCB::Changing crossVersion 3.0.2 -> 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY in experimental/crossScalaVersions

875OpenCB::Changing crossVersion 3.0.2 -> 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY in coreJVM/crossScalaVersions

876OpenCB::Changing crossVersion 3.0.2 -> 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY in reactiveStreams/crossScalaVersions

877OpenCB::Changing crossVersion 3.0.2 -> 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY in coreJS/crossScalaVersions

878OpenCB::Changing crossVersion 3.0.2 -> 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY in io/crossScalaVersions

879[info] set current project to root (in build file:/build/repo/)

880[info] Setting Scala version to 3.8.1-RC1-bin-20260102-32e416e-NIGHTLY on 9 projects.

881[info] Switching Scala version on:

882[info] experimental (3.8.1-RC1-bin-20260102-32e416e-NIGHTLY, 2.12.20, 2.13.16)

883[info] rootJS (3.8.1-RC1-bin-20260102-32e416e-NIGHTLY, 2.12.20, 2.13.16)

884[info] coreJS (3.8.1-RC1-bin-20260102-32e416e-NIGHTLY, 2.12.20, 2.13.16)

885[info] coreJVM (3.8.1-RC1-bin-20260102-32e416e-NIGHTLY, 2.12.20, 2.13.16)

886[info] rootJVM (3.8.1-RC1-bin-20260102-32e416e-NIGHTLY, 2.12.20, 2.13.16)

887[info] rootNative (3.8.1-RC1-bin-20260102-32e416e-NIGHTLY, 2.12.20, 2.13.16)

888[info] io (3.8.1-RC1-bin-20260102-32e416e-NIGHTLY, 2.12.20, 2.13.16)

889[info] reactiveStreams (3.8.1-RC1-bin-20260102-32e416e-NIGHTLY, 2.12.20, 2.13.16)

890[info] benchmark (3.8.1-RC1-bin-20260102-32e416e-NIGHTLY, 2.12.20, 2.13.16)

891[info] Excluding projects:

892[info] * root (2.13.16)

893[info] Reapplying settings...

894[info] set current project to root (in build file:/build/repo/)

895Execute mapScalacOptions: ,REQUIRE:-source:3.8,-Wconf:msg=can be rewritten automatically under:s ,-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e

896[info] Reapplying settings...

897[info] set current project to root (in build file:/build/repo/)

898[info] Defining Global / credentials, benchmark / credentials and 8 others.

899[info] The new values will be used by allCredentials, benchmark / allCredentials and 57 others.

900[info] Run `last` for details.

901[info] Reapplying settings...

902[info] set current project to root (in build file:/build/repo/)

903Execute excludeLibraryDependency: com.github.ghik:zerowaste_{scalaVersion} com.olegpy:better-monadic-for_3 org.polyvariant:better-tostring_{scalaVersion} org.wartremover:wartremover_{scalaVersion}

904[info] Reapplying settings...

905OpenCB::Failed to reapply settings in excludeLibraryDependency: Reference to undefined setting:

906

907 Global / allExcludeDependencies from Global / allExcludeDependencies (CommunityBuildPlugin.scala:331)

908 Did you mean allExcludeDependencies ?

909 , retry without global scopes

910[info] Reapplying settings...

911[info] set current project to root (in build file:/build/repo/)

912Execute removeScalacOptionsStartingWith: -P:wartremover

913[info] Reapplying settings...

914[info] set current project to root (in build file:/build/repo/)

915[success] Total time: 0 s, completed Jan 3, 2026, 12:50:15 AM

916Build config: {"projects":{"exclude":[],"overrides":{}},"java":{"version":"17"},"sbt":{"commands":[],"options":[]},"mill":{"options":[]},"tests":"compile-only","migrationVersions":["3.4","3.7"],"sourcePatches":[]}

917Parsed config: Success(ProjectBuildConfig(ProjectsConfig(List(),Map()),CompileOnly,List()))

918Starting build...

919Projects: Set(coreJVM, experimental, io, reactiveStreams)

920Starting build for ProjectRef(file:/build/repo/,coreJVM) (fs2-core)... [0/4]

921OpenCB::Exclude Scala3 specific scalacOption `REQUIRE:-source:3.8` in Scala 2.12.20 module Global

922OpenCB::Filter out '-source:3.0-migration', matches setting pattern '^-?-source(:.*)?'

923Compile scalacOptions: -language:implicitConversions, -Ykind-projector, -Wconf:msg=can be rewritten automatically under:s, -source:3.8

924[info] compiling 35 Scala sources to /build/repo/core/jvm/target/scala-3.8.1-RC1-bin-20260102-32e416e-NIGHTLY/classes ...

925[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

926[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Pull.scala:177:10 -------

927[warn] 177 | @nowarn("cat=unused-params")

928[warn] | ^^^^^^^^^^^^^^^^^^^

929[warn] | Invalid message filter

930[warn] | unknown category: unused-params

931[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1060:10 ----

932[warn] 1060 | @nowarn("cat=unused-params")

933[warn] | ^^^^^^^^^^^^^^^^^^^

934[warn] | Invalid message filter

935[warn] | unknown category: unused-params

936[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1098:10 ----

937[warn] 1098 | @nowarn("cat=unused-params")

938[warn] | ^^^^^^^^^^^^^^^^^^^

939[warn] | Invalid message filter

940[warn] | unknown category: unused-params

941[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:1117:10 ----

942[warn] 1117 | @nowarn("cat=unused-params")

943[warn] | ^^^^^^^^^^^^^^^^^^^

944[warn] | Invalid message filter

945[warn] | unknown category: unused-params

946[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:2343:10 ----

947[warn] 2343 | @nowarn("cat=unused-params")

948[warn] | ^^^^^^^^^^^^^^^^^^^

949[warn] | Invalid message filter

950[warn] | unknown category: unused-params

951[warn] -- Warning: /build/repo/core/shared/src/main/scala/fs2/Stream.scala:3450:10 ----

952[warn] 3450 | @nowarn("cat=unused-params")

953[warn] | ^^^^^^^^^^^^^^^^^^^

954[warn] | Invalid message filter

955[warn] | unknown category: unused-params

956[warn] -- [E029] Pattern Match Exhaustivity Warning: /build/repo/core/shared/src/main/scala/fs2/internal/Algebra.scala:98:9

957[warn] 98 | ViewL(this) match {

958[warn] | ^^^^^^^^^^^

959[warn] | match may not be exhaustive.

960[warn] |

961[warn] | It would fail on pattern case: fs2.internal.FreeC.ViewL.View(_)

962[warn] |

963[warn] | longer explanation available when compiling with `-explain`

964[warn] -- [E092] Pattern Match Unchecked Warning: /build/repo/core/shared/src/main/scala/fs2/internal/Algebra.scala:697:17

965[warn] 697 | case output: Output[X] =>

966[warn] | ^

967[warn] |the type test for fs2.internal.FreeC.Output[X] cannot be checked at runtime because its type arguments can't be determined from fs2.internal.FreeC.Action[F, X, y]

968[warn] |

969[warn] | longer explanation available when compiling with `-explain`

970[warn] 9 warnings found

971[info] done compiling

972/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

973 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

974 ^

975/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

976 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

977 ^

978[info] compiling 41 Scala sources to /build/repo/core/jvm/target/scala-3.8.1-RC1-bin-20260102-32e416e-NIGHTLY/test-classes ...

979[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

980[warn] one warning found

981[info] done compiling

982/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

983 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

984 ^

985/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

986 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

987 ^

988/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

989 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

990 ^

991/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

992 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

993 ^

994Starting build for ProjectRef(file:/build/repo/,experimental) (fs2-experimental)... [1/4]

995Compile scalacOptions: -language:implicitConversions, -Ykind-projector, -Wconf:msg=can be rewritten automatically under:s, -source:3.8

996[info] compiling 2 Scala sources to /build/repo/experimental/target/scala-3.8.1-RC1-bin-20260102-32e416e-NIGHTLY/classes ...

997[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

998[warn] one warning found

999[info] done compiling

1000/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

1001 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

1002 ^

1003/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

1004 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

1005 ^

1006/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

1007 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

1008 ^

1009/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

1010 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

1011 ^

1012/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

1013 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

1014 ^

1015/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

1016 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

1017 ^

1018Starting build for ProjectRef(file:/build/repo/,io) (fs2-io)... [2/4]

1019Compile scalacOptions: -language:implicitConversions, -Ykind-projector, -Wconf:msg=can be rewritten automatically under:s, -source:3.8

1020[info] compiling 27 Scala sources to /build/repo/io/target/scala-3.8.1-RC1-bin-20260102-32e416e-NIGHTLY/classes ...

1021[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

1022[warn] -- Warning: /build/repo/io/src/main/scala/fs2/io/file/WriteCursor.scala:96:10 --

1023[warn] 96 | @nowarn("cat=unused-params")

1024[warn] | ^^^^^^^^^^^^^^^^^^^

1025[warn] | Invalid message filter

1026[warn] | unknown category: unused-params

1027[warn] two warnings found

1028[info] done compiling

1029/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

1030 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

1031 ^

1032/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

1033 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

1034 ^

1035[info] compiling 12 Scala sources to /build/repo/io/target/scala-3.8.1-RC1-bin-20260102-32e416e-NIGHTLY/test-classes ...

1036[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

1037[warn] -- Warning: /build/repo/io/src/test/scala/fs2/io/IoSuite.scala:152:59 ----------

1038[warn] 152 | Shrink.xmap[Int, ChunkSize](ChunkSize(_), _.value) {

1039[warn] | ^

1040[warn] |Implicit parameters should be provided with a `using` clause.

1041[warn] |To disable the warning, please use the following option:

1042[warn] | "-Wconf:msg=Implicit parameters should be provided with a `using` clause:s"

1043[warn] |

1044[warn] 153 | Shrink.shrinkIntegral[Int].suchThat(_ > defaultPipedInputStreamBufferSize)

1045[warn] 154 | }

1046[warn] two warnings found

1047[info] done compiling

1048/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

1049 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

1050 ^

1051/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

1052 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

1053 ^

1054/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

1055 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

1056 ^

1057/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

1058 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

1059 ^

1060Starting build for ProjectRef(file:/build/repo/,reactiveStreams) (fs2-reactive-streams)... [3/4]

1061Compile scalacOptions: -language:implicitConversions, -Ykind-projector, -Wconf:msg=can be rewritten automatically under:s, -source:3.8

1062[info] compiling 4 Scala sources to /build/repo/reactive-streams/target/scala-3.8.1-RC1-bin-20260102-32e416e-NIGHTLY/classes ...

1063[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

1064[warn] one warning found

1065[info] done compiling

1066/build/repo/reactive-streams/src/main/scala/fs2/interop/reactivestreams/StreamUnicastPublisher.scala:39: error: ] expected but >: found

1067 def subscribe(subscriber: Subscriber[? >: A]): Unit = {

1068 ^

1069/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

1070 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

1071 ^

1072/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

1073 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

1074 ^

1075[info] compiling 6 Scala sources to /build/repo/reactive-streams/target/scala-3.8.1-RC1-bin-20260102-32e416e-NIGHTLY/test-classes ...

1076[warn] Option -Ykind-projector is deprecated: Use -Xkind-projector instead.

1077[warn] one warning found

1078[info] done compiling

1079/build/repo/reactive-streams/src/main/scala/fs2/interop/reactivestreams/StreamUnicastPublisher.scala:39: error: ] expected but >: found

1080 def subscribe(subscriber: Subscriber[? >: A]): Unit = {

1081 ^

1082/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

1083 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

1084 ^

1085/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

1086 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

1087 ^

1088/build/repo/reactive-streams/src/main/scala/fs2/interop/reactivestreams/StreamUnicastPublisher.scala:39: error: ] expected but >: found

1089 def subscribe(subscriber: Subscriber[? >: A]): Unit = {

1090 ^

1091/build/repo/core/shared/src/main/scala/fs2/Stream.scala:2741: error: ) expected but . found

1092 FreeC.translate[F2, G, O](free, u)(using TranslateInterrupt.interruptibleInstance[G])

1093 ^

1094/build/repo/core/shared/src/main/scala-3/fs2/ChunkPlatform.scala:40: error: ) expected but . found

1095 .toArraySeq(using knownType.elementClassTag.asInstanceOf[reflect.ClassTag[O]])

1096 ^

1097

1098************************

1099Build summary:

1100[{

1101 "module": "fs2-core",

1102 "compile": {"status": "ok", "tookMs": 29282, "warnings": 8, "errors": 0, "sourceVersion": "3.8"},

1103 "doc": {"status": "skipped", "tookMs": 0, "files": 0, "totalSizeKb": 0},

1104 "test-compile": {"status": "ok", "tookMs": 18524, "warnings": 0, "errors": 0, "sourceVersion": "3.8"},

1105 "test": {"status": "skipped", "tookMs": 0, "passed": 0, "failed": 0, "ignored": 0, "skipped": 0, "total": 0, "byFramework": []},

1106 "publish": {"status": "skipped", "tookMs": 0},

1107 "metadata": {

1108 "crossScalaVersions": ["3.0.2", "2.12.20", "2.13.16"]

1109}

1110},{

1111 "module": "fs2-experimental",

1112 "compile": {"status": "ok", "tookMs": 850, "warnings": 0, "errors": 0, "sourceVersion": "3.8"},

1113 "doc": {"status": "skipped", "tookMs": 0, "files": 0, "totalSizeKb": 0},

1114 "test-compile": {"status": "ok", "tookMs": 994, "warnings": 0, "errors": 0, "sourceVersion": "3.8"},

1115 "test": {"status": "skipped", "tookMs": 0, "passed": 0, "failed": 0, "ignored": 0, "skipped": 0, "total": 0, "byFramework": []},

1116 "publish": {"status": "skipped", "tookMs": 0},

1117 "metadata": {

1118 "crossScalaVersions": ["3.0.2", "2.12.20", "2.13.16"]

1119}

1120},{

1121 "module": "fs2-io",

1122 "compile": {"status": "ok", "tookMs": 3369, "warnings": 1, "errors": 0, "sourceVersion": "3.8"},

1123 "doc": {"status": "skipped", "tookMs": 0, "files": 0, "totalSizeKb": 0},

1124 "test-compile": {"status": "ok", "tookMs": 2800, "warnings": 1, "errors": 0, "sourceVersion": "3.8"},

1125 "test": {"status": "skipped", "tookMs": 0, "passed": 0, "failed": 0, "ignored": 0, "skipped": 0, "total": 0, "byFramework": []},

1126 "publish": {"status": "skipped", "tookMs": 0},

1127 "metadata": {

1128 "crossScalaVersions": ["3.0.2", "2.12.20", "2.13.16"]

1129}

1130},{

1131 "module": "fs2-reactive-streams",

1132 "compile": {"status": "ok", "tookMs": 1025, "warnings": 0, "errors": 0, "sourceVersion": "3.8"},

1133 "doc": {"status": "skipped", "tookMs": 0, "files": 0, "totalSizeKb": 0},

1134 "test-compile": {"status": "ok", "tookMs": 2370, "warnings": 0, "errors": 0, "sourceVersion": "3.8"},

1135 "test": {"status": "skipped", "tookMs": 0, "passed": 0, "failed": 0, "ignored": 0, "skipped": 0, "total": 0, "byFramework": []},

1136 "publish": {"status": "skipped", "tookMs": 0},

1137 "metadata": {

1138 "crossScalaVersions": ["3.0.2", "2.12.20", "2.13.16"]

1139}

1140}]

1141************************

1142[success] Total time: 76 s (0:01:16.0), completed Jan 3, 2026, 12:51:32 AM

1143[0JChecking patch project/plugins.sbt...

1144Checking patch build.sbt...

1145Applied patch project/plugins.sbt cleanly.

1146Applied patch build.sbt cleanly.

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