Closed
Description
Minimized code
object ABug {
sealed trait Nat {
inline def ++ : Succ[this.type] = Succ(this)
transparent inline def +(inline that: Nat): Nat =
inline this match {
case Zero => that
case Succ(p) => p + that.++
}
}
case object Zero extends Nat
case class Succ[N <: Nat](p: N) extends Nat
transparent inline def toIntg(inline n: Nat): Int =
inline n match {
case Zero => 0
case Succ(p) => toIntg(p) + 1
}
val j31 = toIntg(Zero.++.++.++ + Zero.++)
}Output (click arrow to expand)
Command line to compile
```
/cygdrive/c/scala/dotty-0.24/bin/dotc -classpath ../../bin -extdirs ../../lib -indent -new-syntax -migration -d C:/cygwin64/tmp/tmp.LkNnaL4AKp -deprecation -feature -unchecked -Xfatal-warnings -Yexplicit-nulls -explain -explain-types ../../tst/metb/ABug.scala
```
Output of the compilation
exception occurred while typechecking ..\..\tst\metb\ABug.scala
exception occurred while compiling ..\..\tst\metb\ABug.scala
java.lang.AssertionError: assertion failed: position not set for ABug.Succ.apply[(Nat_this : ABug.Zero.type)](Nat_this):ABug.Succ[Nat_this.type] # 2239 of class dotty.tools.dotc.ast.Trees$Typed in ..\..\tst\metb\ABug.scala while compiling ../../tst/metb/ABug.scala
Exception in thread "main" java.lang.AssertionError: assertion failed: position not set for ABug.Succ.apply[(Nat_this : ABug.Zero.type)](Nat_this):ABug.Succ[Nat_this.type] # 2239 of class dotty.tools.dotc.ast.Trees$Typed in ..\..\tst\metb\ABug.scala
at dotty.DottyPredef$.assertFail(DottyPredef.scala:17)
at dotty.tools.dotc.typer.Typer$.assertPositioned(Typer.scala:62)
at dotty.tools.dotc.typer.Typer.op$1(Typer.scala:2437)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2452)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2455)
at dotty.tools.dotc.typer.Typer.typedInlined(Typer.scala:1524)
at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2366)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2404)
at dotty.tools.dotc.typer.ReTyper.typedUnadapted(ReTyper.scala:124)
at dotty.tools.dotc.typer.Typer.op$1(Typer.scala:2443)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2452)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2455)
at dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:2566)
at dotty.tools.dotc.typer.Typer.typedValDef(Typer.scala:1802)
at dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:2319)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2403)
at dotty.tools.dotc.typer.ReTyper.typedUnadapted(ReTyper.scala:124)
at dotty.tools.dotc.typer.Typer.op$1(Typer.scala:2443)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2452)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2455)
at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2477)
at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2522)
at dotty.tools.dotc.typer.Typer.typedBlockStats(Typer.scala:849)
at dotty.tools.dotc.typer.Typer.typedBlock(Typer.scala:853)
at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2353)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2404)
at dotty.tools.dotc.typer.ReTyper.typedUnadapted(ReTyper.scala:124)
at dotty.tools.dotc.typer.Typer.op$1(Typer.scala:2443)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2452)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2455)
at dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:2566)
at dotty.tools.dotc.typer.Typer.typedValDef(Typer.scala:1802)
at dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:2319)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2403)
at dotty.tools.dotc.typer.ReTyper.typedUnadapted(ReTyper.scala:124)
at dotty.tools.dotc.typer.Typer.op$1(Typer.scala:2443)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2452)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2455)
at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2477)
at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2522)
at dotty.tools.dotc.typer.Typer.typedBlockStats(Typer.scala:849)
at dotty.tools.dotc.typer.Typer.typedBlock(Typer.scala:853)
at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2353)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2404)
at dotty.tools.dotc.typer.ReTyper.typedUnadapted(ReTyper.scala:124)
at dotty.tools.dotc.typer.Typer.op$1(Typer.scala:2443)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2452)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2455)
at dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:2566)
at dotty.tools.dotc.typer.Inliner$InlineTyper.typedMatchFinish(Inliner.scala:1289)
at dotty.tools.dotc.typer.Typer.typedMatch(Typer.scala:1284)
at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2358)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2404)
at dotty.tools.dotc.typer.ReTyper.typedUnadapted(ReTyper.scala:124)
at dotty.tools.dotc.typer.Typer.op$1(Typer.scala:2443)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2452)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2455)
at dotty.tools.dotc.typer.Inliner.op$1(Inliner.scala:753)
at dotty.tools.dotc.typer.Inliner.inlined(Inliner.scala:772)
at dotty.tools.dotc.typer.Inliner$.inlineCall(Inliner.scala:115)
at dotty.tools.dotc.typer.Typer.adaptNoArgsOther$4(Typer.scala:3084)
at dotty.tools.dotc.typer.Typer.adaptNoArgs$1(Typer.scala:3181)
at dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:3389)
at dotty.tools.dotc.typer.Typer.op$3(Typer.scala:2777)
at dotty.tools.dotc.typer.Typer.adapt(Typer.scala:2778)
at dotty.tools.dotc.typer.Typer.op$1(Typer.scala:2443)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2452)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2455)
at dotty.tools.dotc.typer.Namer.typedAheadExpr$$anonfun$1(Namer.scala:1329)
at dotty.tools.dotc.typer.Namer.typedAhead(Namer.scala:1319)
at dotty.tools.dotc.typer.Namer.typedAheadExpr(Namer.scala:1329)
at dotty.tools.dotc.typer.Namer.rhsType$2(Namer.scala:1463)
at dotty.tools.dotc.typer.Namer.cookedRhsType$1(Namer.scala:1474)
at dotty.tools.dotc.typer.Namer.lhsType$1(Namer.scala:1475)
at dotty.tools.dotc.typer.Namer.inferredType$1(Namer.scala:1486)
at dotty.tools.dotc.typer.Namer.valOrDefDefSig(Namer.scala:1494)
at dotty.tools.dotc.typer.Namer$Completer.typeSig(Namer.scala:809)
at dotty.tools.dotc.typer.Namer$Completer.completeInCreationContext(Namer.scala:930)
at dotty.tools.dotc.typer.Namer$Completer.complete(Namer.scala:841)
at dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:259)
at dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:186)
at dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:188)
at dotty.tools.dotc.core.SymDenotations$SymDenotation.ensureCompleted(SymDenotations.scala:446)
at dotty.tools.dotc.typer.Typer.retrieveSym(Typer.scala:2287)
at dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:2312)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2403)
at dotty.tools.dotc.typer.Typer.op$1(Typer.scala:2443)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2452)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2455)
at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2477)
at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2522)
at dotty.tools.dotc.typer.Typer.typedClassDef(Typer.scala:2003)
at dotty.tools.dotc.typer.Typer.typedTypeOrClassDef$2(Typer.scala:2333)
at dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:2337)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2403)
at dotty.tools.dotc.typer.Typer.op$1(Typer.scala:2443)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2452)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2455)
at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2477)
at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2522)
at dotty.tools.dotc.typer.Typer.typedPackageDef(Typer.scala:2129)
at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2376)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2404)
at dotty.tools.dotc.typer.Typer.op$1(Typer.scala:2443)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2452)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2455)
at dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:2566)
at dotty.tools.dotc.typer.FrontEnd.liftedTree1$1(FrontEnd.scala:79)
at dotty.tools.dotc.typer.FrontEnd.typeCheck$$anonfun$1(FrontEnd.scala:84)
at dotty.runtime.function.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
at dotty.tools.dotc.typer.FrontEnd.monitor(FrontEnd.scala:42)
at dotty.tools.dotc.typer.FrontEnd.typeCheck(FrontEnd.scala:85)
at dotty.tools.dotc.typer.FrontEnd.runOn$$anonfun$3(FrontEnd.scala:114)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.immutable.List.foreach(List.scala:333)
at dotty.tools.dotc.typer.FrontEnd.runOn(FrontEnd.scala:114)
at dotty.tools.dotc.Run.runPhases$4$$anonfun$4(Run.scala:165)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1323)
at dotty.tools.dotc.Run.runPhases$5(Run.scala:175)
at dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:183)
at dotty.runtime.function.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:64)
at dotty.tools.dotc.Run.compileUnits(Run.scala:190)
at dotty.tools.dotc.Run.compileSources(Run.scala:127)
at dotty.tools.dotc.Run.compile(Run.scala:110)
at dotty.tools.dotc.Driver.doCompile(Driver.scala:38)
at dotty.tools.dotc.Driver.process(Driver.scala:194)
at dotty.tools.dotc.Driver.process(Driver.scala:163)
at dotty.tools.dotc.Driver.process(Driver.scala:175)
at dotty.tools.dotc.Driver.main(Driver.scala:202)
at dotty.tools.dotc.Main.main(Main.scala)