Open
Description
When migrating one of Scala2 projects into Scala I ended up in infinite compilation loop. I was not yet able to minimize it, but I'm providing a thread dump of a compiler.
Compiler version
3.2.1
Minimized code
No minimization yet
Subsequent thread dump pointed to the same last method, so probably it's impossible to leave dotty.tools.dotc.core.Types$ThisType.underlying(Types.scala:2938) function call
Thread dump (click arrow to expand)
"pool-11-thread-13" #356 prio=5 os_prio=0 cpu=6580194,19ms elapsed=6618,22s tid=0x00007f081cfc4800 nid=0x77889 runnable [0x00007f07e19c6000]
java.lang.Thread.State: RUNNABLE
at dotty.tools.dotc.core.Types$ThisType.underlying(Types.scala:2938)
at dotty.tools.dotc.core.Types$TypeProxy.superType(Types.scala:1987)
at dotty.tools.dotc.core.Types$Type.showPrefixSafely$1(Types.scala:887)
at dotty.tools.dotc.core.Types$Type.findMember$$anonfun$1(Types.scala:891)
at dotty.tools.dotc.core.Types$Type$$Lambda$8774/0x0000000102213c40.apply(Unknown Source)
at dotty.tools.dotc.core.RecursionOverflow.explanation(TypeErrors.scala:47)
at dotty.tools.dotc.core.RecursionOverflow.opsString$$anonfun$1(TypeErrors.scala:69)
at dotty.tools.dotc.core.RecursionOverflow$$Lambda$8779/0x0000000102241840.apply(Unknown Source)
at scala.collection.immutable.List.map(List.scala:246)
at dotty.tools.dotc.core.RecursionOverflow.opsString(TypeErrors.scala:69)
at dotty.tools.dotc.core.RecursionOverflow.produceMessage$$anonfun$4(TypeErrors.scala:79)
at dotty.tools.dotc.core.RecursionOverflow$$Lambda$8775/0x0000000102210c40.apply(Unknown Source)
at dotty.tools.dotc.reporting.NoExplanation.msg(Message.scala:154)
at dotty.tools.dotc.reporting.Message.message(Message.scala:102)
at dotty.tools.dotc.reporting.Message.isNonSensical(Message.scala:114)
at dotty.tools.dotc.reporting.HideNonSensicalMessages.isHidden(HideNonSensicalMessages.scala:16)
at dotty.tools.dotc.reporting.HideNonSensicalMessages.isHidden$(HideNonSensicalMessages.scala:10)
at dotty.tools.dotc.reporting.AbstractReporter.isHidden(AbstractReporter.scala:8)
at dotty.tools.dotc.reporting.Reporter.issueUnconfigured(Reporter.scala:155)
at dotty.tools.dotc.reporting.Reporter.go$1(Reporter.scala:180)
at dotty.tools.dotc.reporting.Reporter.issueIfNotSuppressed(Reporter.scala:199)
at dotty.tools.dotc.reporting.Reporter.report(Reporter.scala:202)
at dotty.tools.dotc.report$.error(report.scala:63)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:662)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$3(TreePickler.scala:432)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$adapted$3(TreePickler.scala:434)
at dotty.tools.dotc.core.tasty.TreePickler$$Lambda$6751/0x0000000101beb040.apply(Unknown Source)
at scala.Function0.apply$mcV$sp(Function0.scala:42)
at dotty.tools.dotc.core.tasty.TreePickler.withLength(TreePickler.scala:58)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:434)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTreeUnlessEmpty(TreePickler.scala:321)
at dotty.tools.dotc.core.tasty.TreePickler.pickleDef$$anonfun$1(TreePickler.scala:338)
at dotty.tools.dotc.core.tasty.TreePickler.pickleDef$$anonfun$adapted$1(TreePickler.scala:340)
at dotty.tools.dotc.core.tasty.TreePickler$$Lambda$6749/0x0000000101bea840.apply(Unknown Source)
at scala.Function0.apply$mcV$sp(Function0.scala:42)
at dotty.tools.dotc.core.tasty.TreePickler.withLength(TreePickler.scala:58)
at dotty.tools.dotc.core.tasty.TreePickler.pickleDef(TreePickler.scala:340)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:550)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$9$$anonfun$1(TreePickler.scala:474)
at dotty.tools.dotc.core.tasty.TreePickler$$Lambda$6779/0x0000000101bf9840.applyVoid(Unknown Source)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.immutable.List.foreach(List.scala:333)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$9(TreePickler.scala:474)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$adapted$8(TreePickler.scala:474)
at dotty.tools.dotc.core.tasty.TreePickler$$Lambda$6778/0x0000000101bf8440.apply(Unknown Source)
at scala.Function0.apply$mcV$sp(Function0.scala:42)
at dotty.tools.dotc.core.tasty.TreePickler.withLength(TreePickler.scala:58)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:474)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTreeUnlessEmpty(TreePickler.scala:321)
at dotty.tools.dotc.core.tasty.TreePickler.pickleDef$$anonfun$1(TreePickler.scala:338)
at dotty.tools.dotc.core.tasty.TreePickler.pickleDef$$anonfun$adapted$1(TreePickler.scala:340)
at dotty.tools.dotc.core.tasty.TreePickler$$Lambda$6749/0x0000000101bea840.apply(Unknown Source)
at scala.Function0.apply$mcV$sp(Function0.scala:42)
at dotty.tools.dotc.core.tasty.TreePickler.withLength(TreePickler.scala:58)
at dotty.tools.dotc.core.tasty.TreePickler.pickleDef(TreePickler.scala:340)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:565)
at dotty.tools.dotc.core.tasty.TreePickler.pickleStats$$anonfun$2(TreePickler.scala:365)
at dotty.tools.dotc.core.tasty.TreePickler$$Lambda$6745/0x0000000101be9040.applyVoid(Unknown Source)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.immutable.List.foreach(List.scala:333)
at dotty.tools.dotc.core.tasty.TreePickler.pickleStats(TreePickler.scala:365)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$26(TreePickler.scala:591)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$adapted$24(TreePickler.scala:592)
at dotty.tools.dotc.core.tasty.TreePickler$$Lambda$6761/0x0000000101bf1040.apply(Unknown Source)
at scala.Function0.apply$mcV$sp(Function0.scala:42)
at dotty.tools.dotc.core.tasty.TreePickler.withLength(TreePickler.scala:58)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:592)
at dotty.tools.dotc.core.tasty.TreePickler.pickleDef$$anonfun$1(TreePickler.scala:335)
at dotty.tools.dotc.core.tasty.TreePickler.pickleDef$$anonfun$adapted$1(TreePickler.scala:340)
at dotty.tools.dotc.core.tasty.TreePickler$$Lambda$6749/0x0000000101bea840.apply(Unknown Source)
at scala.Function0.apply$mcV$sp(Function0.scala:42)
at dotty.tools.dotc.core.tasty.TreePickler.withLength(TreePickler.scala:58)
at dotty.tools.dotc.core.tasty.TreePickler.pickleDef(TreePickler.scala:340)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:567)
at dotty.tools.dotc.core.tasty.TreePickler.pickleStats$$anonfun$2(TreePickler.scala:365)
at dotty.tools.dotc.core.tasty.TreePickler$$Lambda$6745/0x0000000101be9040.applyVoid(Unknown Source)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.immutable.List.foreach(List.scala:333)
at dotty.tools.dotc.core.tasty.TreePickler.pickleStats(TreePickler.scala:365)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$29(TreePickler.scala:607)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$adapted$27(TreePickler.scala:607)
at dotty.tools.dotc.core.tasty.TreePickler$$Lambda$6743/0x0000000101be7840.apply(Unknown Source)
at scala.Function0.apply$mcV$sp(Function0.scala:42)
at dotty.tools.dotc.core.tasty.TreePickler.withLength(TreePickler.scala:58)
at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:607)
at dotty.tools.dotc.core.tasty.TreePickler.pickle$$anonfun$1(TreePickler.scala:779)
at dotty.tools.dotc.core.tasty.TreePickler$$Lambda$6742/0x0000000101be7040.applyVoid(Unknown Source)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.immutable.List.foreach(List.scala:333)
at dotty.tools.dotc.core.tasty.TreePickler.pickle(TreePickler.scala:779)
at dotty.tools.dotc.transform.Pickler.run$$anonfun$1$$anonfun$1(Pickler.scala:72)
at dotty.tools.dotc.transform.Pickler$$Lambda$6741/0x0000000101be6840.applyVoid(Unknown Source)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.immutable.List.foreach(List.scala:333)
at dotty.tools.dotc.transform.Pickler.run$$anonfun$1(Pickler.scala:110)
at dotty.tools.dotc.transform.Pickler$$Lambda$6738/0x0000000101be4040.applyVoid(Unknown Source)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.immutable.List.foreach(List.scala:333)
at dotty.tools.dotc.transform.Pickler.run(Pickler.scala:110)
at dotty.tools.dotc.core.Phases$Phase.runOn$$anonfun$1(Phases.scala:316)
at dotty.tools.dotc.core.Phases$Phase$$Lambda$6574/0x0000000100ff4040.apply(Unknown Source)
at scala.collection.immutable.List.map(List.scala:250)
at dotty.tools.dotc.core.Phases$Phase.runOn(Phases.scala:320)
at dotty.tools.dotc.transform.Pickler.runOn(Pickler.scala:115)
at dotty.tools.dotc.Run.runPhases$1$$anonfun$1(Run.scala:233)
at dotty.tools.dotc.Run$$Lambda$5632/0x00000001018f1840.applyVoid(Unknown Source)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1321)
at dotty.tools.dotc.Run.runPhases$1(Run.scala:244)
at dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:252)
at dotty.tools.dotc.Run.compileUnits$$anonfun$adapted$1(Run.scala:261)
at dotty.tools.dotc.Run$$Lambda$5594/0x00000001018c3440.apply(Unknown Source)
at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:68)
at dotty.tools.dotc.Run.compileUnits(Run.scala:261)
at dotty.tools.dotc.Run.compileSources(Run.scala:185)
at dotty.tools.dotc.Run.compile(Run.scala:169)
at dotty.tools.dotc.Driver.doCompile(Driver.scala:35)
at dotty.tools.xsbt.CompilerBridgeDriver.run(CompilerBridgeDriver.java:88)
- locked <0x00000000e036d438> (a dotty.tools.xsbt.CompilerBridgeDriver)
at dotty.tools.xsbt.CompilerBridge.run(CompilerBridge.java:22)
at sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:91)
at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$7(MixedAnalyzingCompiler.scala:193)
at sbt.internal.inc.MixedAnalyzingCompiler$$Lambda$5325/0x00000001015f0c40.apply$mcV$sp(Unknown Source)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
at sbt.internal.inc.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:248)
at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4(MixedAnalyzingCompiler.scala:183)
at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4$adapted(MixedAnalyzingCompiler.scala:163)
at sbt.internal.inc.MixedAnalyzingCompiler$$Lambda$5321/0x00000001015ed040.apply(Unknown Source)
at sbt.internal.inc.JarUtils$.withPreviousJar(JarUtils.scala:239)
at sbt.internal.inc.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:163)
at sbt.internal.inc.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:211)
at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1(IncrementalCompilerImpl.scala:534)
at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1$adapted(IncrementalCompilerImpl.scala:534)
at sbt.internal.inc.IncrementalCompilerImpl$$Lambda$3110/0x0000000100ee7c40.apply(Unknown Source)
at sbt.internal.inc.Incremental$.$anonfun$apply$5(Incremental.scala:179)
at sbt.internal.inc.Incremental$.$anonfun$apply$5$adapted(Incremental.scala:177)
at sbt.internal.inc.Incremental$$$Lambda$3117/0x0000000100ef7040.apply(Unknown Source)
at sbt.internal.inc.Incremental$$anon$2.run(Incremental.scala:463)
at sbt.internal.inc.IncrementalCommon$CycleState.next(IncrementalCommon.scala:116)
at sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:56)
at sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:52)
at sbt.internal.inc.IncrementalCommon.cycle(IncrementalCommon.scala:263)
at sbt.internal.inc.Incremental$.$anonfun$incrementalCompile$8(Incremental.scala:418)
at sbt.internal.inc.Incremental$$$Lambda$3153/0x0000000100f1a840.apply(Unknown Source)
at sbt.internal.inc.Incremental$.withClassfileManager(Incremental.scala:506)
at sbt.internal.inc.Incremental$.incrementalCompile(Incremental.scala:405)
at sbt.internal.inc.Incremental$.apply(Incremental.scala:171)
at sbt.internal.inc.IncrementalCompilerImpl.compileInternal(IncrementalCompilerImpl.scala:534)
at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileIncrementally$1(IncrementalCompilerImpl.scala:488)
at sbt.internal.inc.IncrementalCompilerImpl$$Lambda$3039/0x0000000100e84840.apply(Unknown Source)
at sbt.internal.inc.IncrementalCompilerImpl.handleCompilationError(IncrementalCompilerImpl.scala:332)
at sbt.internal.inc.IncrementalCompilerImpl.compileIncrementally(IncrementalCompilerImpl.scala:425)
at sbt.internal.inc.IncrementalCompilerImpl.compile(IncrementalCompilerImpl.scala:137)
at sbt.Defaults$.compileIncrementalTaskImpl(Defaults.scala:2363)
at sbt.Defaults$.$anonfun$compileIncrementalTask$2(Defaults.scala:2313)
at sbt.Defaults$$$Lambda$3032/0x0000000100e83040.apply(Unknown Source)
at sbt.internal.server.BspCompileTask$.$anonfun$compute$1(BspCompileTask.scala:30)
at sbt.internal.server.BspCompileTask$$$Lambda$3034/0x0000000100e87040.apply(Unknown Source)
at sbt.internal.io.Retry$.apply(Retry.scala:46)
at sbt.internal.io.Retry$.apply(Retry.scala:28)
at sbt.internal.io.Retry$.apply(Retry.scala:23)
at sbt.internal.server.BspCompileTask$.compute(BspCompileTask.scala:30)
at sbt.Defaults$.$anonfun$compileIncrementalTask$1(Defaults.scala:2311)
at sbt.Defaults$$$Lambda$892/0x00000001006d8040.apply(Unknown Source)
at scala.Function1.$anonfun$compose$1(Function1.scala:49)
at scala.Function1$$Lambda$291/0x0000000100461840.apply(Unknown Source)
at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
at sbt.internal.util.$tilde$greater$$Lambda$2610/0x0000000100d29840.apply(Unknown Source)
at sbt.std.Transform$$anon$4.work(Transform.scala:68)
at sbt.Execute.$anonfun$submit$2(Execute.scala:282)
at sbt.Execute$$Lambda$2640/0x0000000100d36c40.apply(Unknown Source)
at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
at sbt.Execute.work(Execute.scala:291)
at sbt.Execute.$anonfun$submit$1(Execute.scala:282)
at sbt.Execute$$Lambda$2620/0x0000000100d2f440.apply(Unknown Source)
at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
at sbt.ConcurrentRestrictions$$anon$4$$Lambda$2627/0x0000000100d32040.apply(Unknown Source)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:64)
at java.util.concurrent.FutureTask.run(java.base@11.0.9.1/FutureTask.java:264)
at java.util.concurrent.Executors$RunnableAdapter.call(java.base@11.0.9.1/Executors.java:515)
at java.util.concurrent.FutureTask.run(java.base@11.0.9.1/FutureTask.java:264)
at java.util.concurrent.ThreadPoolExecutor.runWorker(java.base@11.0.9.1/ThreadPoolExecutor.java:1128)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(java.base@11.0.9.1/ThreadPoolExecutor.java:628)
at java.lang.Thread.run(java.base@11.0.9.1/Thread.java:834)```
</details>