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minimized code
val a = implicitly[ValueOf[_]]Stack trace
exception occurred while typechecking testing/Test.scala
exception occurred while compiling testing/Test.scala
java.lang.AssertionError: no TypeBounds allowed while compiling testing/Test.scala
Exception in thread "main" java.lang.AssertionError: no TypeBounds allowed
at dotty.tools.dotc.core.TypeApplications$.noBounds(TypeApplications.scala:21)
at dotty.tools.dotc.core.TypeApplications$.argTypes$extension$$anonfun$1(TypeApplications.scala:483)
at scala.collection.immutable.List.mapConserve(List.scala:444)
at dotty.tools.dotc.core.TypeApplications$.argTypes$extension(TypeApplications.scala:483)
at dotty.tools.dotc.typer.Implicits.synthesizedValueOf$$anonfun$1$$anonfun$1(Implicits.scala:858)
at dotty.tools.dotc.typer.Implicits.trySpecialCases$1(Implicits.scala:1119)
at dotty.tools.dotc.typer.Implicits.trySpecialCases$2$$anonfun$1(Implicits.scala:1121)
at dotty.tools.dotc.ast.Trees$Tree.orElse(Trees.scala:185)
at dotty.tools.dotc.typer.Implicits.trySpecialCases$1(Implicits.scala:1121)
at dotty.tools.dotc.typer.Implicits.trySpecialCases$2$$anonfun$1(Implicits.scala:1121)
at dotty.tools.dotc.ast.Trees$Tree.orElse(Trees.scala:185)
at dotty.tools.dotc.typer.Implicits.trySpecialCases$1(Implicits.scala:1121)
at dotty.tools.dotc.typer.Implicits.trySpecialCases$2$$anonfun$1(Implicits.scala:1121)
at dotty.tools.dotc.ast.Trees$Tree.orElse(Trees.scala:185)
at dotty.tools.dotc.typer.Implicits.trySpecialCases$1(Implicits.scala:1121)
at dotty.tools.dotc.typer.Implicits.trySpecialCases$2$$anonfun$1(Implicits.scala:1121)
at dotty.tools.dotc.ast.Trees$Tree.orElse(Trees.scala:185)
at dotty.tools.dotc.typer.Implicits.trySpecialCases$1(Implicits.scala:1121)
at dotty.tools.dotc.typer.Implicits.inferImplicitArg(Implicits.scala:1126)
at dotty.tools.dotc.typer.Typer.inferImplicitArg(Typer.scala:83)
at dotty.tools.dotc.typer.Typer.implicitArgs$2(Typer.scala:2649)
at dotty.tools.dotc.typer.Typer.addImplicitArgs$4(Typer.scala:2672)
at dotty.tools.dotc.typer.Typer.adaptNoArgsImplicitMethod$2(Typer.scala:2739)
at dotty.tools.dotc.typer.Typer.adaptNoArgs$1(Typer.scala:2911)
at dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:3139)
at dotty.tools.dotc.typer.Typer.adapt(Typer.scala:2544)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2213)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2225)
at dotty.tools.dotc.typer.Namer.typedAheadExpr$$anonfun$1(Namer.scala:1263)
at dotty.tools.dotc.typer.Namer.typedAhead(Namer.scala:1253)
at dotty.tools.dotc.typer.Namer.typedAheadExpr(Namer.scala:1263)
at dotty.tools.dotc.typer.Namer.rhsType$2(Namer.scala:1397)
at dotty.tools.dotc.typer.Namer.cookedRhsType$1(Namer.scala:1408)
at dotty.tools.dotc.typer.Namer.lhsType$1(Namer.scala:1409)
at dotty.tools.dotc.typer.Namer.inferredType$1(Namer.scala:1420)
at dotty.tools.dotc.typer.Namer.valOrDefDefSig(Namer.scala:1428)
at dotty.tools.dotc.typer.Namer$Completer.typeSig(Namer.scala:811)
at dotty.tools.dotc.typer.Namer$Completer.completeInCreationContext(Namer.scala:935)
at dotty.tools.dotc.typer.Namer$Completer.complete(Namer.scala:843)
at dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:258)
at dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:185)
at dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:187)
at dotty.tools.dotc.core.SymDenotations$SymDenotation.ensureCompleted(SymDenotations.scala:398)
at dotty.tools.dotc.typer.Typer.retrieveSym(Typer.scala:2071)
at dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:2096)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2176)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2213)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2225)
at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2247)
at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2291)
at dotty.tools.dotc.typer.Typer.typedClassDef(Typer.scala:1784)
at dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:2109)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2176)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2213)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2225)
at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2247)
at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2291)
at dotty.tools.dotc.typer.Typer.typedPackageDef(Typer.scala:1910)
at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2150)
at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2177)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2213)
at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2225)
at dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:2333)
at dotty.tools.dotc.typer.FrontEnd.liftedTree1$2(FrontEnd.scala:78)
at dotty.tools.dotc.typer.FrontEnd.typeCheck$$anonfun$1(FrontEnd.scala:83)
at dotty.runtime.function.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
at dotty.tools.dotc.typer.FrontEnd.monitor(FrontEnd.scala:42)
at dotty.tools.dotc.typer.FrontEnd.typeCheck(FrontEnd.scala:84)
at dotty.tools.dotc.typer.FrontEnd.runOn$$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:305)
at dotty.tools.dotc.typer.FrontEnd.runOn(FrontEnd.scala:114)
at dotty.tools.dotc.Run.runPhases$4$$anonfun$4(Run.scala:161)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1323)
at dotty.tools.dotc.Run.runPhases$5(Run.scala:171)
at dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:179)
at dotty.runtime.function.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:65)
at dotty.tools.dotc.Run.compileUnits(Run.scala:186)
at dotty.tools.dotc.Run.compileSources(Run.scala:123)
at dotty.tools.dotc.Run.compile(Run.scala:106)
at dotty.tools.dotc.Driver.doCompile(Driver.scala:36)
at dotty.tools.dotc.Driver.process(Driver.scala:189)
at dotty.tools.dotc.Driver.process(Driver.scala:158)
at dotty.tools.dotc.Driver.process(Driver.scala:170)
at dotty.tools.dotc.Driver.main(Driver.scala:197)
at dotty.tools.dotc.Main.main(Main.scala)