Closed
Description
The following code crashes Dotty:
class A(a: Int) {
class X {
val x = a
}
trait Y {
val y = a
}
trait Z(val o: A) extends o.Y {
val z = a
}
class B extends X with Z(new A(4))
}error message
Exception in thread "main" java.lang.AssertionError: assertion failed: failure to construct path from method A$Y$$$outer/class B/class A/package /package to `this` of trait Z in class A; class A does not have an outer accessor at dotty.DottyPredef$.assertFail(DottyPredef.scala:36) at dotty.tools.dotc.transform.ExplicitOuter$OuterOps$.loop$1(ExplicitOuter.scala:388) at dotty.tools.dotc.transform.ExplicitOuter$OuterOps$.path$extension(ExplicitOuter.scala:394) at dotty.tools.dotc.transform.LambdaLift$Lifter.memberRef(LambdaLift.scala:400) at dotty.tools.dotc.transform.LambdaLift.transformIdent(LambdaLift.scala:519) at dotty.tools.dotc.transform.MegaPhase.goIdent(MegaPhase.scala:518) at dotty.tools.dotc.transform.MegaPhase.transformNamed$1(MegaPhase.scala:210) at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:366) at dotty.tools.dotc.transform.MegaPhase.transformUnnamed$1(MegaPhase.scala:250) at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:367) at dotty.tools.dotc.transform.MegaPhase.mapDefDef$1(MegaPhase.scala:230) at dotty.tools.dotc.transform.MegaPhase.transformNamed$1(MegaPhase.scala:233) at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:366) at dotty.tools.dotc.transform.MegaPhase.transformStat$2(MegaPhase.scala:375) at dotty.tools.dotc.transform.MegaPhase.$anonfun$1(MegaPhase.scala:380) at scala.collection.immutable.List.mapConserve(List.scala:176) at dotty.tools.dotc.transform.MegaPhase.transformStats(MegaPhase.scala:380) at dotty.tools.dotc.transform.MegaPhase.transformUnnamed$1(MegaPhase.scala:319) at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:367) at dotty.tools.dotc.transform.MegaPhase.transformNamed$1(MegaPhase.scala:236) at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:366) at dotty.tools.dotc.transform.MegaPhase.transformStat$2(MegaPhase.scala:375) at dotty.tools.dotc.transform.MegaPhase.$anonfun$1(MegaPhase.scala:380) at scala.collection.immutable.List.mapConserve(List.scala:176) at dotty.tools.dotc.transform.MegaPhase.transformStats(MegaPhase.scala:380) at dotty.tools.dotc.transform.MegaPhase.transformUnnamed$1(MegaPhase.scala:319) at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:367) at dotty.tools.dotc.transform.MegaPhase.transformNamed$1(MegaPhase.scala:236) at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:366) at dotty.tools.dotc.transform.MegaPhase.transformStat$2(MegaPhase.scala:375) at dotty.tools.dotc.transform.MegaPhase.$anonfun$1(MegaPhase.scala:380) at scala.collection.immutable.List.mapConserve(List.scala:176) at dotty.tools.dotc.transform.MegaPhase.transformStats(MegaPhase.scala:380) at dotty.tools.dotc.transform.MegaPhase.mapPackage$1(MegaPhase.scala:336) at dotty.tools.dotc.transform.MegaPhase.transformUnnamed$1(MegaPhase.scala:339) at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:367) at dotty.tools.dotc.transform.MegaPhase.transformUnit(MegaPhase.scala:386) at dotty.tools.dotc.transform.MegaPhase.run(MegaPhase.scala:398) at dotty.tools.dotc.core.Phases$Phase.runOn$$anonfun$1(Phases.scala:295) at scala.collection.immutable.List.map(List.scala:283) at dotty.tools.dotc.core.Phases$Phase.runOn(Phases.scala:297) at dotty.tools.dotc.Run.runPhases$4$$anonfun$4(Run.scala:171) at scala.compat.java8.JProcedure1.apply(JProcedure1.java:18) at scala.compat.java8.JProcedure1.apply(JProcedure1.java:10) at scala.collection.IndexedSeqOptimized.foreach(IndexedSeqOptimized.scala:32) at scala.collection.IndexedSeqOptimized.foreach$(IndexedSeqOptimized.scala:29) at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:191) at dotty.tools.dotc.Run.runPhases$5(Run.scala:186) at dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:194) at scala.compat.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12) at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:88) at dotty.tools.dotc.Run.compileUnits(Run.scala:201) at dotty.tools.dotc.Run.compileSources(Run.scala:136) at dotty.tools.dotc.Run.compile(Run.scala:120) at dotty.tools.dotc.Driver.doCompile(Driver.scala:29) at dotty.tools.dotc.Driver.process(Driver.scala:127) at dotty.tools.dotc.Driver.process(Driver.scala:96) at dotty.tools.dotc.Driver.process(Driver.scala:108) at dotty.tools.dotc.Driver.main(Driver.scala:135) at dotty.tools.dotc.Main.main(Main.scala)