Build Logs

lampepfl/gears • 3.8.0-RC6:2026-01-08

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 3.8.0-RC6

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 3.8.0-RC6

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: 3.8.0-RC6

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=3.8.0-RC6

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 3.8.0-RC6"

60"++3.8.0-RC6 -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 3.8.0-RC6 """{"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 8.123s.

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: 3.8.0-RC6

79OpenCB::Changing crossVersion 3.3.3 -> 3.8.0-RC6 in rootNative/crossScalaVersions

80OpenCB::Changing crossVersion 3.3.3 -> 3.8.0-RC6 in repo/crossScalaVersions

81OpenCB::Changing crossVersion 3.3.3 -> 3.8.0-RC6 in rootJVM/crossScalaVersions

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

83[info] Setting Scala version to 3.8.0-RC6 on 3 projects.

84[info] Switching Scala version on:

85[info] * repo (3.8.0-RC6)

86[info] rootJVM (3.8.0-RC6)

87[info] rootNative (3.8.0-RC6)

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 8, 2026, 2:29:05 AM

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-3.8.0-RC6/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-3.8.0-RC6/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

175SourceBehavior:

176 + onComplete register after completion runs immediately 0.015s

177 + poll is asynchronous 0.022s

178 + onComplete is asynchronous 0.011s

179 + await is synchronous 0.352s

180 + sources wait on children sources when they block 0.145s

181 + sources do not wait on zombie sources (which are killed at the end of Async.Blocking) 0.003s

182 + poll() 0.102s

183 + onComplete() fires 0.202s

184 + dropped onComplete() listener does not fire 0.201s

185 + transform values with 0.002s

186 + all listeners in chain fire 0.152s

187 + either 0.401s

188 + source values 0.202s

189 + transformValuesWith unsubscribes 0.002s

190RetryBehavior:

191 + Exponential backoff(2) 50ms, 5 times total schedule 0.785s

192 + UntilSuccess 150ms 0.602s

193 + UntilFailure 150ms 0.602s

194 + delay policies 0.006s

195true false

196ListenerBehavior:

197 + race two futures 0.003s

198 + lock two listeners 0.002s

199 + lock two listeners where one fails 0.006s

200 + lock two races 0.002s

201 + lock two races in reverse order 0.001s

202 + lock two nested races 0.002s

203 + lock two nested races in reverse order 0.001s

204 + race successful without wait 0.002s

205 + race successful with wait 0.005s

206 + race polling 0.002s

207 + race failed without wait 0.001s

208 + lockBoth of race with competing lock 0.002s

209 + conflicting locks 0.002s

210 + failing downstream listener is dropped in race 0.003s

211 + succeeding downstream listener is dropped in race 0.002s

212SchedulerBehavior:

213 + schedule cancellation works 1.002s

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

215 + execute works 0.0s

216TaskScheduleBehavior:

217 + Every 100ms, 3 times total schedule 0.21s

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

219 + Fibonacci backoff 10ms, 6 times total schedule 0.123s

220 + UntilSuccess 150ms 0.602s

221 + UntilFailure 150ms 0.603s

222CancellationBehavior:

223 + no cancel 0.403s

224 + group cancel 0.001s

225 + link group 0.002s

226 + nested link group 0.002s

227 + link to already cancelled 0.502s

228 + link to already cancelled awaited 0.001s

229TimerBehavior:

230 + sleeping does sleep 0.201s

231 + timer does sleep 1.003s

232 + racing with a sleeping future 2.253s

2331

234FutureBehavior:

235 + Old test 0.06s

236 + Constant returns 0.005s

237 + Future.now returning 0.001s

238 + Constant future with timeout 0.051s

239 + or 0.008s

240 + orWithCancel of 2 futures 0.606s

241 + zip 0.001s

242 + result wraps exceptions 0.003s

243 + result wraps values 0.003s

244 + value propagates exceptions exceptions through futures 0.003s

245 + futures can be nested 0.033s

246 + future are cancelled via .interrupt() and not checking the flag in async 0.002s

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

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

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

250 + noninterruptible future immediate return 0.002s

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

252 + Promise can be cancelled 0.001s

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

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

255 + Future.withResolver cancel handler is not run after being completed 0.0s

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

257 + Nesting of cancellations 0.402s

258 + future collector 1.001s

259 + mutable collector 2.002s

260 + future collection: awaitAll* 1.003s

261 + future collection: awaitFirst* 1.005s

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

263JVMCancellationBehavior:

264 + no cancel -> timeout 5.001s

265ChannelBehavior:

266 + sending is blocking in SyncChannel 0.512s

267 + sending is nonblocking in empty BufferedChannel 0.502s

268 + sending is blocking in full BufferedChannel 0.501s

269 + read blocks until value is available in SyncChannel 1.002s

270 + read blocks until value is available in BufferedChannel 1.001s

271 + values arrive in order 0.071s

272 + reading a closed channel returns Failure(ChannelClosedException) 0.003s

273 + writing to a closed channel throws ChannelClosedException 0.001s

274 + send a lot of values via a channel and check their sum 0.137s

275 + multiple writers, multiple readers 6.003s

276 + race reads 0.045s

277 + unbounded channels with sync sending 0.001s

278 + race sends 0.115s

279 + race syntax 0.002s

280 + ChannelMultiplexer multiplexes - all subscribers read the same stream 0.005s

281 + ChannelMultiplexer multiple readers and writers 1.006s

282StressTest:

283 + survives a stress test that hammers on creating futures 11.365s

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

285

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

287Build summary:

288[{

289 "module": "gears",

290 "compile": {"status": "ok", "tookMs": 9241, "warnings": 1, "errors": 0, "sourceVersion": "3.8"},

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

292 "test-compile": {"status": "ok", "tookMs": 4456, "warnings": 5, "errors": 0, "sourceVersion": "3.8"},

293 "test": {"status": "ok", "tookMs": 31846, "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: 47 s, completed Jan 8, 2026, 2:29:52 AM

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.