Closed
Description
Scala 3.1.2
trait Template[+T <: Template[T]]:
type Clone <: T { type Clone = Template.this.Clone }
val self :Clone
type Food = Template[_]
class Ham extends Template[Ham]:
type Clone = Ham
val self = this
def eat[F <: Template[F]](food :F) :F = food.self.self
val ham = new Ham
val food :Food = ham
eat(ham)
eat(food.self)Output
java.lang.Error: internal error: type of right-hand side Playground.Template[Playground.food.T] is not fully defined, pos = [929..933..952]
at dotty.tools.dotc.typer.Inferencing$.fullyDefinedType(Inferencing.scala:57)
at dotty.tools.dotc.typer.Namer.lhsType$1(Namer.scala:1717)
at dotty.tools.dotc.typer.Namer.inferredResultType(Namer.scala:1728)
at dotty.tools.dotc.typer.Namer.inferredType$1(Namer.scala:1468)
at dotty.tools.dotc.typer.Namer.valOrDefDefSig(Namer.scala:1475)
at dotty.tools.dotc.typer.Namer$Completer.typeSig(Namer.scala:751)
at dotty.tools.dotc.typer.Namer$Completer.completeInCreationContext(Namer.scala:887)
at dotty.tools.dotc.typer.Namer$Completer.complete(Namer.scala:779)
at dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:167)
at dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:188)
at dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:190)
at dotty.tools.dotc.core.SymDenotations$SymDenotation.ensureCompleted(SymDenotations.scala:369)
at dotty.tools.dotc.typer.Typer.retrieveSym(Typer.scala:2697)
at dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:2722)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2817)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2883)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2887)
at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2909)
at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2959)
at dotty.tools.dotc.typer.Typer.typedBlockStats(Typer.scala:1027)
at dotty.tools.dotc.typer.Typer.typedBlock(Typer.scala:1031)
at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2763)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2818)
at dotty.tools.dotc.typer.ProtoTypes$FunProto.$anonfun$5(ProtoTypes.scala:431)
at dotty.tools.dotc.typer.ProtoTypes$FunProto.cacheTypedArg(ProtoTypes.scala:359)
at dotty.tools.dotc.typer.ProtoTypes$FunProto.typedArg(ProtoTypes.scala:432)
at dotty.tools.dotc.typer.Applications$ApplyToUntyped.typedArg(Applications.scala:853)
at dotty.tools.dotc.typer.Applications$ApplyToUntyped.typedArg(Applications.scala:853)
at dotty.tools.dotc.typer.Applications$Application.addTyped$1(Applications.scala:544)
at dotty.tools.dotc.typer.Applications$Application.matchArgs(Applications.scala:609)
at dotty.tools.dotc.typer.Applications$Application.init(Applications.scala:447)
at dotty.tools.dotc.typer.Applications$TypedApply.<init>(Applications.scala:735)
at dotty.tools.dotc.typer.Applications$ApplyToUntyped.<init>(Applications.scala:852)
at dotty.tools.dotc.typer.Applications.ApplyTo(Applications.scala:1060)
at dotty.tools.dotc.typer.Applications.ApplyTo$(Applications.scala:317)
at dotty.tools.dotc.typer.Typer.ApplyTo(Typer.scala:107)
at dotty.tools.dotc.typer.Applications.simpleApply$1(Applications.scala:907)
at dotty.tools.dotc.typer.Applications.realApply$5$$anonfun$4(Applications.scala:986)
at dotty.tools.dotc.typer.Typer.tryEither(Typer.scala:3011)
at dotty.tools.dotc.typer.Applications.realApply$1(Applications.scala:997)
at dotty.tools.dotc.typer.Applications.typedApply(Applications.scala:1035)
at dotty.tools.dotc.typer.Applications.typedApply$(Applications.scala:317)
at dotty.tools.dotc.typer.Typer.typedApply(Typer.scala:107)
at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2755)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2818)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2883)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2887)
at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2936)
at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2959)
at dotty.tools.dotc.typer.Typer.typedClassDef(Typer.scala:2409)
at dotty.tools.dotc.typer.Typer.typedTypeOrClassDef$2(Typer.scala:2743)
at dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:2747)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2817)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2883)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2887)
at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2909)
at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2959)
at dotty.tools.dotc.typer.Typer.typedPackageDef(Typer.scala:2532)
at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2788)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2818)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2883)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2887)
at dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:3003)
at dotty.tools.dotc.typer.TyperPhase.liftedTree1$1(TyperPhase.scala:56)
at dotty.tools.dotc.typer.TyperPhase.typeCheck$$anonfun$1(TyperPhase.scala:62)
at dotty.tools.dotc.core.Phases$Phase.monitor(Phases.scala:411)
at dotty.tools.dotc.typer.TyperPhase.typeCheck(TyperPhase.scala:63)
at dotty.tools.dotc.typer.TyperPhase.runOn$$anonfun$1(TyperPhase.scala:105)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.immutable.List.foreach(List.scala:333)
at dotty.tools.dotc.typer.TyperPhase.runOn(TyperPhase.scala:105)
at dotty.tools.dotc.Run.runPhases$4$$anonfun$4(Run.scala:261)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1323)
at dotty.tools.dotc.Run.runPhases$5(Run.scala:272)
at dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:280)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:68)
at dotty.tools.dotc.Run.compileUnits(Run.scala:289)
at dotty.tools.dotc.Run.compileSources(Run.scala:222)
at dotty.tools.dotc.Run.compile(Run.scala:206)
at dotty.tools.dotc.Driver.doCompile(Driver.scala:39)
at dotty.tools.xsbt.CompilerBridgeDriver.run(CompilerBridgeDriver.java:88)
at dotty.tools.xsbt.CompilerBridge.run(CompilerBridge.java:22)
at sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:91)
at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$7(MixedAnalyzingCompiler.scala:192)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
at sbt.internal.inc.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:247)
at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4(MixedAnalyzingCompiler.scala:182)
at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4$adapted(MixedAnalyzingCompiler.scala:163)
at sbt.internal.inc.JarUtils$.withPreviousJar(JarUtils.scala:239)
at sbt.internal.inc.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:163)
at sbt.internal.inc.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:210)
at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1(IncrementalCompilerImpl.scala:528)
at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1$adapted(IncrementalCompilerImpl.scala:528)
at sbt.internal.inc.Incremental$.$anonfun$apply$5(Incremental.scala:177)
at sbt.internal.inc.Incremental$.$anonfun$apply$5$adapted(Incremental.scala:175)
at sbt.internal.inc.Incremental$$anon$2.run(Incremental.scala:461)
at sbt.internal.inc.IncrementalCommon$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$8(Incremental.scala:416)
at sbt.internal.inc.Incremental$.withClassfileManager(Incremental.scala:503)
at sbt.internal.inc.Incremental$.incrementalCompile(Incremental.scala:403)
at sbt.internal.inc.Incremental$.apply(Incremental.scala:169)
at sbt.internal.inc.IncrementalCompilerImpl.compileInternal(IncrementalCompilerImpl.scala:528)
at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileIncrementally$1(IncrementalCompilerImpl.scala:482)
at sbt.internal.inc.IncrementalCompilerImpl.handleCompilationError(IncrementalCompilerImpl.scala:332)
at sbt.internal.inc.IncrementalCompilerImpl.compileIncrementally(IncrementalCompilerImpl.scala:420)
at sbt.internal.inc.IncrementalCompilerImpl.compile(IncrementalCompilerImpl.scala:137)
at sbt.Defaults$.compileIncrementalTaskImpl(Defaults.scala:2366)
at sbt.Defaults$.$anonfun$compileIncrementalTask$2(Defaults.scala:2316)
at sbt.internal.server.BspCompileTask$.$anonfun$compute$1(BspCompileTask.scala:30)
at sbt.internal.io.Retry$.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$1(Defaults.scala:2314)
at scala.Function1.$anonfun$compose$1(Function1.scala:49)
at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
at sbt.std.Transform$$anon$4.work(Transform.scala:68)
at sbt.Execute.$anonfun$submit$2(Execute.scala:282)
at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
at sbt.Execute.work(Execute.scala:291)
at sbt.Execute.$anonfun$submit$1(Execute.scala:282)
at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:64)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:831)
The problem is the last line.
Expectation
Should compile? Hopefully