Build Logs

lampepfl/gears • 3.8.1-RC1:2026-01-13

Errors

Warnings

Total Lines

306

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

2Clonning https://github.com/lampepfl/gears.git into /build/repo using revision v0.2.0

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

4Note: switching to 'a4a6b721442ce1ad964376b759766d7846947daf'.

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.

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:

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

15Or undo this operation with:

17 git switch -

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

21----

22Preparing build for 3.8.1-RC1

23Scala binary version found: 3.8

24Implicitly using source version 3.8

25Scala binary version found: 3.8

26Implicitly using source version 3.8

27Would try to apply common scalacOption (best-effort, sbt/mill only):

28Append: ,REQUIRE:-source:3.8

29Remove: ,-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e

30----

31Starting build for 3.8.1-RC1

32Execute tests: true

33sbt project found:

34Sbt version 1.10.0 is not supported, minimal supported version is 1.11.5

35Enforcing usage of sbt in version 1.11.5

36No prepare script found for project lampepfl/gears

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

38Scala version: 3.8.1-RC1

39Targets: ch.epfl.lamp%gears

40Project projectConfig: {"projects":{"exclude":[],"overrides":{}},"java":{"version":"21"},"sbt":{"commands":[],"options":[]},"mill":{"options":[]},"tests":"full","migrationVersions":[],"sourcePatches":[]}

41##################################

42Using extra scalacOptions: ,REQUIRE:-source:3.8

43Filtering out scalacOptions: ,-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e

44[sbt_options] declare -a sbt_options=()

45[process_args] java_version = '21'

46[copyRt] java9_rt = '/root/.sbt/1.0/java9-rt-ext-eclipse_adoptium_21/rt.jar'

47# Executing command line:

48java

49-Dfile.encoding=UTF-8

50-Dcommunitybuild.scala=3.8.1-RC1

51-Dcommunitybuild.project.dependencies.add=

52-Xmx7G

53-Xms4G

54-Xss8M

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

56-Dscala.ext.dirs=/root/.sbt/1.0/java9-rt-ext-eclipse_adoptium_21

57-jar

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

59"setCrossScalaVersions 3.8.1-RC1"

60"++3.8.1-RC1 -v"

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

62"set every credentials := Nil"

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

64"removeScalacOptionsStartingWith -P:wartremover"

66moduleMappings

67"runBuild 3.8.1-RC1 """{"projects":{"exclude":[],"overrides":{}},"java":{"version":"21"},"sbt":{"commands":[],"options":[]},"mill":{"options":[]},"tests":"full","migrationVersions":[],"sourcePatches":[]}""" ch.epfl.lamp%gears"

69[info] welcome to sbt 1.11.5 (Eclipse Adoptium Java 21)

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 8.214s.

75[info] done compiling

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

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

78Execute setCrossScalaVersions: 3.8.1-RC1

79OpenCB::Changing crossVersion 3.3.3 -> 3.8.1-RC1 in rootJVM/crossScalaVersions

80OpenCB::Changing crossVersion 3.3.3 -> 3.8.1-RC1 in rootNative/crossScalaVersions

81OpenCB::Changing crossVersion 3.3.3 -> 3.8.1-RC1 in repo/crossScalaVersions

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

83[info] Setting Scala version to 3.8.1-RC1 on 3 projects.

84[info] Switching Scala version on:

85[info] * repo (3.8.1-RC1)

86[info] rootJVM (3.8.1-RC1)

87[info] rootNative (3.8.1-RC1)

88[info] Excluding projects:

89[info] Reapplying settings...

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

91Execute mapScalacOptions: ,REQUIRE:-source:3.8,-Wconf:msg=can be rewritten automatically under:s ,-deprecation,-feature,-Xfatal-warnings,-Werror,MATCH:.*-Wconf.*any:e

92[info] Reapplying settings...

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

94[info] Defining Global / credentials, credentials and 1 others.

95[info] The new values will be used by Global / pgpSelectPassphrase, Global / pgpSigningKey and 14 others.

96[info] Run `last` for details.

97[info] Reapplying settings...

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

99Execute excludeLibraryDependency: com.github.ghik:zerowaste_{scalaVersion} com.olegpy:better-monadic-for_3 org.polyvariant:better-tostring_{scalaVersion} org.wartremover:wartremover_{scalaVersion}

100[info] Reapplying settings...

101OpenCB::Failed to reapply settings in excludeLibraryDependency: Reference to undefined setting:

102

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

104 Did you mean rootJVM / allExcludeDependencies ?

105 , retry without global scopes

106[info] Reapplying settings...

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

108Execute removeScalacOptionsStartingWith: -P:wartremover

109[info] Reapplying settings...

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

111[success] Total time: 0 s, completed Jan 13, 2026, 8:23:58 PM

112Build config: {"projects":{"exclude":[],"overrides":{}},"java":{"version":"21"},"sbt":{"commands":[],"options":[]},"mill":{"options":[]},"tests":"full","migrationVersions":[],"sourcePatches":[]}

113Parsed config: Success(ProjectBuildConfig(ProjectsConfig(List(),Map()),Full,List()))

114Starting build...

115Projects: Set(rootJVM)

116Starting build for ProjectRef(file:/build/repo/,rootJVM) (gears)... [0/1]

117OpenCB::Exclude Scala3 specific scalacOption `REQUIRE:-source:3.8` in Scala 2.12.20 module Global

118Compile scalacOptions: -Wconf:msg=can be rewritten automatically under:s, -source:3.8

119[info] compiling 21 Scala sources to /build/repo/jvm/target/scala-3.8.1-RC1/classes ...

120[warn] -- [E197] Potential Issue Warning: /build/repo/shared/src/main/scala/async/Listener.scala:53:8

121[warn] 53 | new Listener[T]:

122[warn] | ^

123[warn] | New anonymous class definition will be duplicated at each inline site

124[warn] |

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

126[warn] there were 17 deprecation warnings; re-run with -deprecation for details

127[warn] two warnings found

128[info] done compiling

129[info] compiling 11 Scala sources to /build/repo/jvm/target/scala-3.8.1-RC1/test-classes ...

130[warn] -- [E029] Pattern Match Exhaustivity Warning: /build/repo/shared/src/test/scala/ChannelBehavior.scala:309:32

131[warn] 309 | a.readSource handle { case Right(v) =>

132[warn] | ^

133[warn] | match may not be exhaustive.

134[warn] |

135[warn] | It would fail on pattern case: Left(_)

136[warn] |

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

138[warn] -- [E029] Pattern Match Exhaustivity Warning: /build/repo/shared/src/test/scala/ChannelBehavior.scala:312:36

139[warn] 312 | b.sendSource(10) handle { case Right(_) =>

140[warn] | ^

141[warn] | match may not be exhaustive.

142[warn] |

143[warn] | It would fail on pattern case: Left(_)

144[warn] |

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

146[warn] -- [E029] Pattern Match Exhaustivity Warning: /build/repo/shared/src/test/scala/SourceBehavior.scala:134:43

147[warn] 134 | assertEquals(f.transformValuesWith({ case Success(i) => i + 1 }).awaitResult, 11)

148[warn] | ^

149[warn] | match may not be exhaustive.

150[warn] |

151[warn] | It would fail on pattern case: scala.util.Failure(_)

152[warn] |

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

154[warn] -- [E029] Pattern Match Exhaustivity Warning: /build/repo/shared/src/test/scala/SourceBehavior.scala:136:43

155[warn] 136 | assertEquals(g.transformValuesWith({ case Failure(_) => 17 }).awaitResult, 17)

156[warn] | ^

157[warn] | match may not be exhaustive.

158[warn] |

159[warn] | It would fail on pattern case: scala.util.Success(_)

160[warn] |

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

162[warn] -- [E092] Pattern Match Unchecked Warning: /build/repo/shared/src/test/scala/FutureBehavior.scala:184:13

163[warn] 184 | case _: Failure[CancellationException] => ()

164[warn] | ^

165[warn] |the type test for scala.util.Failure[java.util².concurrent.CancellationException] cannot be checked at runtime because its type arguments can't be determined from scala.util.Try[Int]

166[warn] |

167[warn] |where: util is a package in package scala

168[warn] | util² is a package in package java

169[warn] |

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

171[warn] there were 33 deprecation warnings; re-run with -deprecation for details

172[warn] 6 warnings found

173[info] done compiling

174[warn] javaOptions will be ignored, fork is set to false

175CancellationBehavior:

176 + no cancel 0.43s

177 + group cancel 0.002s

178 + link group 0.003s

179 + nested link group 0.004s

180 + link to already cancelled 0.502s

181 + link to already cancelled awaited 0.001s

182RetryBehavior:

183 + Exponential backoff(2) 50ms, 5 times total schedule 0.78s

184 + UntilSuccess 150ms 0.602s

185 + UntilFailure 150ms 0.603s

186 + delay policies 0.006s

187SchedulerBehavior:

188 + schedule cancellation works 1.027s

189 + schedule cancellation doesn't abort inner code 1.052s

190 + execute works 0.001s

191SourceBehavior:

192 + onComplete register after completion runs immediately 0.001s

193 + poll is asynchronous 0.001s

194 + onComplete is asynchronous 0.001s

195 + await is synchronous 0.352s

196 + sources wait on children sources when they block 0.143s

197 + sources do not wait on zombie sources (which are killed at the end of Async.Blocking) 0.002s

198 + poll() 0.101s

199 + onComplete() fires 0.202s

200 + dropped onComplete() listener does not fire 0.202s

201 + transform values with 0.003s

202 + all listeners in chain fire 0.164s

203 + either 0.402s

204 + source values 0.207s

205 + transformValuesWith unsubscribes 0.002s

206JVMCancellationBehavior:

207 + no cancel -> timeout 5.029s

208TaskScheduleBehavior:

209 + Every 100ms, 3 times total schedule 0.204s

210 + Exponential backoff(2) 50ms, 5 times total schedule 0.753s

211 + Fibonacci backoff 10ms, 6 times total schedule 0.124s

212 + UntilSuccess 150ms 0.603s

213 + UntilFailure 150ms 0.603s

214true false

215ListenerBehavior:

216 + race two futures 0.002s

217 + lock two listeners 0.002s

218 + lock two listeners where one fails 0.002s

219 + lock two races 0.001s

220 + lock two races in reverse order 0.001s

221 + lock two nested races 0.002s

222 + lock two nested races in reverse order 0.001s

223 + race successful without wait 0.002s

224 + race successful with wait 0.003s

225 + race polling 0.001s

226 + race failed without wait 0.001s

227 + lockBoth of race with competing lock 0.001s

228 + conflicting locks 0.001s

229 + failing downstream listener is dropped in race 0.002s

230 + succeeding downstream listener is dropped in race 0.002s

231TimerBehavior:

232 + sleeping does sleep 0.201s

233 + timer does sleep 1.004s

234 + racing with a sleeping future 2.253s

235ChannelBehavior:

236 + sending is blocking in SyncChannel 0.509s

237 + sending is nonblocking in empty BufferedChannel 0.503s

238 + sending is blocking in full BufferedChannel 0.503s

239 + read blocks until value is available in SyncChannel 1.001s

240 + read blocks until value is available in BufferedChannel 1.004s

241 + values arrive in order 0.086s

242 + reading a closed channel returns Failure(ChannelClosedException) 0.004s

243 + writing to a closed channel throws ChannelClosedException 0.001s

244 + send a lot of values via a channel and check their sum 0.126s

245 + multiple writers, multiple readers 6.002s

246 + race reads 0.059s

247 + unbounded channels with sync sending 0.001s

248 + race sends 0.116s

249 + race syntax 0.002s

250 + ChannelMultiplexer multiplexes - all subscribers read the same stream 0.006s

251 + ChannelMultiplexer multiple readers and writers 1.006s

2521

253FutureBehavior:

254 + Old test 0.003s

255 + Constant returns 0.003s

256 + Future.now returning 0.001s

257 + Constant future with timeout 0.051s

258 + or 0.003s

259 + orWithCancel of 2 futures 0.603s

260 + zip 0.001s

261 + result wraps exceptions 0.002s

262 + result wraps values 0.002s

263 + value propagates exceptions exceptions through futures 0.002s

264 + futures can be nested 0.027s

265 + future are cancelled via .interrupt() and not checking the flag in async 0.003s

266 + future should cancel its group when the main body is completed 1.502s

267 + zombie threads exist and run to completion after the Async.blocking barrier 0.302s

268==> i FutureBehavior.cancelled futures return the same constant CancellationException with no stack attached ignored 0.0s

269 + noninterruptible future immediate return 0.001s

270 + Noninterruptible future cannot be interrupted immediately but throws later 0.301s

271 + Promise can be cancelled 0.001s

272 + Promise can't be cancelled after completion 0.0s

273 + Future.withResolver cancel handler is run once 0.003s

274 + Future.withResolver cancel handler is not run after being completed 0.001s

275 + Future.withResolver is only completed after handler decides 0.002s

276 + Nesting of cancellations 0.402s

277 + future collector 1.002s

278 + mutable collector 2.002s

279 + future collection: awaitAll* 1.004s

280 + future collection: awaitFirst* 1.005s

281 + uninterruptible should continue even when Future is cancelled 0.001s

282StressTest:

283 + survives a stress test that hammers on creating futures 11.11s

284 + survives a stress test that hammers on suspending 20.086s

285

286************************

287Build summary:

288[{

289 "module": "gears",

290 "compile": {"status": "ok", "tookMs": 10016, "warnings": 1, "errors": 0, "sourceVersion": "3.8"},

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

292 "test-compile": {"status": "ok", "tookMs": 4488, "warnings": 5, "errors": 0, "sourceVersion": "3.8"},

293 "test": {"status": "ok", "tookMs": 33659, "passed": 96, "failed": 0, "ignored": 1, "skipped": 0, "total": 97, "byFramework": [{"framework": "munit", "stats": {"passed": 96, "failed": 0, "ignored": 1, "skipped": 0, "total": 97}}]},

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

295 "metadata": {

296 "crossScalaVersions": ["3.3.3"]

297}

298}]

299************************

300[success] Total time: 50 s, completed Jan 13, 2026, 8:24:48 PM

301[0JChecking patch project/plugins.sbt...

302Checking patch project/build.properties...

303Checking patch build.sbt...

304Applied patch project/plugins.sbt cleanly.

305Applied patch project/build.properties cleanly.

306Applied patch build.sbt cleanly.