Closed
Description
The following program crashes the current dotty nightly 0.18.1-bin-20190825-6960f8d-NIGHTLY.
minimized code
trait F[T] { type X }
object Rec extends F[Rec.X]Stack trace
[error] assertion failed
[error] dotty.DottyPredef$.assertFail(DottyPredef.scala:15)
[error] dotty.tools.dotc.core.Types$Type.parents(Types.scala:1366)
[error] dotty.tools.dotc.typer.ImplicitRunInfo.collectCompanions$5(Implicits.scala:591)
[error] dotty.tools.dotc.typer.ImplicitRunInfo.computeIScope$1(Implicits.scala:612)
[error] dotty.tools.dotc.typer.ImplicitRunInfo.iscope$2$$anonfun$1(Implicits.scala:620)
[error] scala.collection.mutable.AnyRefMap.getOrElse(AnyRefMap.scala:156)
[error] dotty.tools.dotc.typer.ImplicitRunInfo.iscope$1(Implicits.scala:620)
[error] dotty.tools.dotc.typer.ImplicitRunInfo.iscopeRefs$1(Implicits.scala:553)
[error] dotty.tools.dotc.typer.ImplicitRunInfo.collectCompanions$4$$anonfun$4(Implicits.scala:594)
[error] dotty.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error] dotty.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error] scala.collection.mutable.LinkedHashSet.foreach(LinkedHashSet.scala:130)
[error] dotty.tools.dotc.typer.ImplicitRunInfo.collectCompanions$5(Implicits.scala:594)
[error] dotty.tools.dotc.typer.ImplicitRunInfo.computeIScope$1(Implicits.scala:612)
[error] dotty.tools.dotc.typer.ImplicitRunInfo.iscope$1(Implicits.scala:621)
[error] dotty.tools.dotc.typer.ImplicitRunInfo.implicitScope(Implicits.scala:624)
[error] dotty.tools.dotc.Run.implicitScope(Run.scala:32)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.implicitScope(Implicits.scala:1635)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.bestImplicit(Implicits.scala:1610)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.bestImplicit(Implicits.scala:1619)
[error] dotty.tools.dotc.typer.Implicits.inferImplicit(Implicits.scala:1302)
[error] dotty.tools.dotc.typer.Typer.inferImplicit(Typer.scala:83)
[error] dotty.tools.dotc.typer.Implicits.inferView(Implicits.scala:669)
[error] dotty.tools.dotc.typer.Typer.inferView(Typer.scala:83)
[error] dotty.tools.dotc.typer.Typer.adaptToSubType$1(Typer.scala:2916)
[error] dotty.tools.dotc.typer.Typer.adaptNoArgsOther$6(Typer.scala:2742)
[error] dotty.tools.dotc.typer.Typer.adaptNoArgs$1(Typer.scala:2798)
[error] dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:3005)
[error] dotty.tools.dotc.typer.Typer.adapt(Typer.scala:2407)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:2108)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:2120)
[error] dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:2196)
[error] dotty.tools.dotc.typer.Typer.typeSelectOnTerm$1(Typer.scala:464)
[error] dotty.tools.dotc.typer.Typer.typedSelect(Typer.scala:487)
[error] dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:1995)
[error] dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2069)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:2108)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:2120)
[error] dotty.tools.dotc.typer.Typer.typedArg$1(Typer.scala:1342)
[error] dotty.tools.dotc.typer.Typer.$anonfun$23(Typer.scala:1347)
[error] dotty.tools.dotc.core.Decorators$ListDecorator$.zipWithConserve$extension(Decorators.scala:109)
[error] dotty.tools.dotc.typer.Typer.typedAppliedTypeTree(Typer.scala:1347)
[error] dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2039)
[error] dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2070)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:2108)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:2120)
[error] dotty.tools.dotc.typer.Namer.typedAheadType$$anonfun$1(Namer.scala:1197)
[error] dotty.tools.dotc.typer.Namer.typedAhead(Namer.scala:1190)
[error] dotty.tools.dotc.typer.Namer.typedAheadType(Namer.scala:1197)
[error] dotty.tools.dotc.typer.Namer$ClassCompleter.parentType$1(Namer.scala:1098)
[error] dotty.tools.dotc.typer.Namer$ClassCompleter.checkedParentType$4(Namer.scala:1126)
[error] dotty.tools.dotc.typer.Namer$ClassCompleter.$anonfun$2(Namer.scala:1157)
[error] scala.collection.immutable.List.map(List.scala:222)
[error] dotty.tools.dotc.typer.Namer$ClassCompleter.completeInCreationContext(Namer.scala:1157)
[error] dotty.tools.dotc.typer.Namer$Completer.complete(Namer.scala:785)
[error] dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:255)
[error] dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:180)
[error] dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:182)
[error] dotty.tools.dotc.core.Types$NamedType.info(Types.scala:1878)
[error] dotty.tools.dotc.core.Types$NamedType.withDenot(Types.scala:2232)
[error] dotty.tools.dotc.core.Types$TypeRef$.apply(Types.scala:2422)
[error] dotty.tools.dotc.core.Types$NamedType$.apply(Types.scala:2396)
[error] dotty.tools.dotc.core.Types$Type.select(Types.scala:1328)
[error] dotty.tools.dotc.typer.Typer.loop$2(Typer.scala:306)
[error] dotty.tools.dotc.typer.Typer.findRefRecur$1(Typer.scala:353)
[error] dotty.tools.dotc.typer.Typer.findRef(Typer.scala:356)
[error] dotty.tools.dotc.typer.Typer.typedIdent(Typer.scala:389)
[error] dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:1994)
[error] dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2069)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:2108)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:2120)
[error] dotty.tools.dotc.typer.Typer.typedType(Typer.scala:2198)
[error] dotty.tools.dotc.typer.Typer.typedValDef(Typer.scala:1484)
[error] dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:1999)
[error] dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2069)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:2108)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:2120)
[error] dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2139)
[error] dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2183)
[error] dotty.tools.dotc.typer.Typer.typedPackageDef(Typer.scala:1806)
[error] dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2045)
[error] dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2070)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:2108)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:2120)
[error] dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:2196)
[error] dotty.tools.dotc.typer.FrontEnd.typeCheck$$anonfun$1(FrontEnd.scala:75)
[error] dotty.runtime.function.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
[error] dotty.tools.dotc.typer.FrontEnd.monitor(FrontEnd.scala:41)
[error] dotty.tools.dotc.typer.FrontEnd.typeCheck(FrontEnd.scala:79)
[error] dotty.tools.dotc.typer.FrontEnd.runOn$$anonfun$3(FrontEnd.scala:109)
[error] dotty.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error] dotty.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error] scala.collection.immutable.List.foreach(List.scala:312)
[error] dotty.tools.dotc.typer.FrontEnd.runOn(FrontEnd.scala:109)
[error] dotty.tools.dotc.Run.runPhases$4$$anonfun$4(Run.scala:158)
[error] dotty.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error] dotty.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error] scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1350)
[error] dotty.tools.dotc.Run.runPhases$5(Run.scala:170)
[error] dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:178)
[error] dotty.runtime.function.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
[error] dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:65)
[error] dotty.tools.dotc.Run.compileUnits(Run.scala:185)
[error] dotty.tools.dotc.Run.compileSources(Run.scala:120)
[error] dotty.tools.dotc.Run.compile(Run.scala:104)
[error] dotty.tools.dotc.Driver.doCompile(Driver.scala:35)
[error] dotty.tools.dotc.Driver.process(Driver.scala:180)
[error] dotty.tools.dotc.Main.process(Main.scala)
[error] xsbt.CachedCompilerImpl.run(CachedCompilerImpl.java:69)
[error] xsbt.CompilerInterface.run(CompilerInterface.java:41)
[error] sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[error] sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[error] sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[error] java.lang.reflect.Method.invoke(Method.java:498)
[error] sbt.internal.inc.AnalyzingCompiler.call(AnalyzingCompiler.scala:237)
[error] sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:111)
[error] sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:90)
[error] sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$3(MixedAnalyzingCompiler.scala:82)
[error] scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
[error] sbt.internal.inc.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:133)
[error] sbt.internal.inc.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:73)
[error] sbt.internal.inc.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:116)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1(IncrementalCompilerImpl.scala:307)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1$adapted(IncrementalCompilerImpl.scala:307)
[error] sbt.internal.inc.Incremental$.doCompile(Incremental.scala:106)
[error] sbt.internal.inc.Incremental$.$anonfun$compile$4(Incremental.scala:87)
[error] sbt.internal.inc.IncrementalCommon.recompileClasses(IncrementalCommon.scala:116)
[error] sbt.internal.inc.IncrementalCommon.cycle(IncrementalCommon.scala:63)
[error] sbt.internal.inc.Incremental$.$anonfun$compile$3(Incremental.scala:89)
[error] sbt.internal.inc.Incremental$.manageClassfiles(Incremental.scala:134)
[error] sbt.internal.inc.Incremental$.compile(Incremental.scala:80)
[error] sbt.internal.inc.IncrementalCompile$.apply(Compile.scala:67)
[error] sbt.internal.inc.IncrementalCompilerImpl.compileInternal(IncrementalCompilerImpl.scala:311)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileIncrementally$1(IncrementalCompilerImpl.scala:269)
[error] sbt.internal.inc.IncrementalCompilerImpl.handleCompilationError(IncrementalCompilerImpl.scala:159)
[error] sbt.internal.inc.IncrementalCompilerImpl.compileIncrementally(IncrementalCompilerImpl.scala:238)
[error] sbt.internal.inc.IncrementalCompilerImpl.compile(IncrementalCompilerImpl.scala:69)
[error] sbt.Defaults$.compileIncrementalTaskImpl(Defaults.scala:1549)
[error] sbt.Defaults$.$anonfun$compileIncrementalTask$1(Defaults.scala:1523)
[error] scala.Function1.$anonfun$compose$1(Function1.scala:44)
[error] sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:40)
[error] sbt.std.Transform$$anon$4.work(System.scala:67)
[error] sbt.Execute.$anonfun$submit$2(Execute.scala:269)
[error] sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:16)
[error] sbt.Execute.work(Execute.scala:278)
[error] sbt.Execute.$anonfun$submit$1(Execute.scala:269)
[error] sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:178)
[error] sbt.CompletionService$$anon$2.call(CompletionService.scala:37)
[error] java.util.concurrent.FutureTask.run(FutureTask.java:266)
[error] java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[error] java.util.concurrent.FutureTask.run(FutureTask.java:266)
[error] java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[error] java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[error] java.lang.Thread.run(Thread.java:748